/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-11 21:34:36,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-11 21:34:36,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-11 21:34:36,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-11 21:34:36,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-11 21:34:36,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-11 21:34:36,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-11 21:34:36,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-11 21:34:36,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-11 21:34:36,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-11 21:34:36,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-11 21:34:36,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-11 21:34:36,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-11 21:34:36,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-11 21:34:36,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-11 21:34:36,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-11 21:34:36,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-11 21:34:36,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-11 21:34:36,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-11 21:34:36,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-11 21:34:36,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-11 21:34:36,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-11 21:34:36,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-11 21:34:36,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-11 21:34:36,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-11 21:34:36,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-11 21:34:36,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-11 21:34:36,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-11 21:34:36,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-11 21:34:36,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-11 21:34:36,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-11 21:34:36,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-11 21:34:36,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-11 21:34:36,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-11 21:34:36,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-11 21:34:36,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-11 21:34:36,126 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-SemanticLbe.epf [2020-11-11 21:34:36,178 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-11 21:34:36,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-11 21:34:36,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-11 21:34:36,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-11 21:34:36,186 INFO L138 SettingsManager]: * Use SBE=true [2020-11-11 21:34:36,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-11 21:34:36,186 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-11 21:34:36,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-11 21:34:36,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-11 21:34:36,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-11 21:34:36,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-11 21:34:36,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-11 21:34:36,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-11 21:34:36,190 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-11 21:34:36,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-11 21:34:36,190 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-11 21:34:36,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-11 21:34:36,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-11 21:34:36,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-11 21:34:36,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-11 21:34:36,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-11 21:34:36,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 21:34:36,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-11 21:34:36,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-11 21:34:36,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-11 21:34:36,192 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-11 21:34:36,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-11 21:34:36,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-11 21:34:36,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-11 21:34:36,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-11 21:34:36,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-11 21:34:36,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-11 21:34:36,675 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-11 21:34:36,676 INFO L275 PluginConnector]: CDTParser initialized [2020-11-11 21:34:36,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2020-11-11 21:34:36,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ae990490/dc1a02ed48e24b4cba6a156b0f80765f/FLAGb1ff51479 [2020-11-11 21:34:37,495 INFO L306 CDTParser]: Found 1 translation units. [2020-11-11 21:34:37,496 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2020-11-11 21:34:37,513 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ae990490/dc1a02ed48e24b4cba6a156b0f80765f/FLAGb1ff51479 [2020-11-11 21:34:37,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ae990490/dc1a02ed48e24b4cba6a156b0f80765f [2020-11-11 21:34:37,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-11 21:34:37,807 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-11 21:34:37,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-11 21:34:37,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-11 21:34:37,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-11 21:34:37,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:34:37" (1/1) ... [2020-11-11 21:34:37,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45933376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:37, skipping insertion in model container [2020-11-11 21:34:37,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:34:37" (1/1) ... [2020-11-11 21:34:37,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-11 21:34:37,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-11 21:34:38,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 21:34:38,270 INFO L203 MainTranslator]: Completed pre-run [2020-11-11 21:34:38,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 21:34:38,417 INFO L208 MainTranslator]: Completed translation [2020-11-11 21:34:38,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:38 WrapperNode [2020-11-11 21:34:38,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-11 21:34:38,420 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-11 21:34:38,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-11 21:34:38,421 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-11 21:34:38,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:38" (1/1) ... [2020-11-11 21:34:38,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:38" (1/1) ... [2020-11-11 21:34:38,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-11 21:34:38,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-11 21:34:38,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-11 21:34:38,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-11 21:34:38,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:38" (1/1) ... [2020-11-11 21:34:38,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:38" (1/1) ... [2020-11-11 21:34:38,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:38" (1/1) ... [2020-11-11 21:34:38,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:38" (1/1) ... [2020-11-11 21:34:38,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:38" (1/1) ... [2020-11-11 21:34:38,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:38" (1/1) ... [2020-11-11 21:34:38,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:38" (1/1) ... [2020-11-11 21:34:38,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-11 21:34:38,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-11 21:34:38,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-11 21:34:38,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-11 21:34:38,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 21:34:38,594 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-11 21:34:38,594 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-11 21:34:38,595 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-11 21:34:38,595 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-11 21:34:38,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-11 21:34:38,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-11 21:34:38,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-11 21:34:38,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-11 21:34:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-11 21:34:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-11 21:34:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-11 21:34:38,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-11 21:34:38,601 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-11 21:34:39,244 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-11 21:34:39,245 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-11 21:34:39,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:34:39 BoogieIcfgContainer [2020-11-11 21:34:39,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-11 21:34:39,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-11 21:34:39,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-11 21:34:39,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-11 21:34:39,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 09:34:37" (1/3) ... [2020-11-11 21:34:39,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c1ab5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:34:39, skipping insertion in model container [2020-11-11 21:34:39,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:38" (2/3) ... [2020-11-11 21:34:39,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c1ab5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:34:39, skipping insertion in model container [2020-11-11 21:34:39,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:34:39" (3/3) ... [2020-11-11 21:34:39,261 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-11-11 21:34:39,284 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-11 21:34:39,285 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-11 21:34:39,289 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-11 21:34:39,291 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-11 21:34:39,336 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,337 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,337 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,338 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,338 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,338 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,339 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,339 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,340 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,340 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,341 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,341 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,342 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,342 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,343 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,343 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,344 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,344 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,345 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,345 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,345 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,346 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,346 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,346 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,346 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,346 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,347 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,347 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,348 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,349 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,349 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,349 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,349 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,350 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,350 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,350 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,350 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,350 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,352 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,352 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,352 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,352 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,353 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,353 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,353 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,353 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,354 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,354 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,355 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,355 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,355 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,355 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,356 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,356 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,356 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,356 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,359 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,360 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,361 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,362 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,370 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,371 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,371 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,371 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,371 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,372 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:39,377 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-11 21:34:39,391 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-11 21:34:39,436 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-11 21:34:39,436 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-11 21:34:39,436 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-11 21:34:39,437 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-11 21:34:39,437 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-11 21:34:39,437 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-11 21:34:39,438 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-11 21:34:39,438 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-11 21:34:39,454 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-11 21:34:39,458 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-11 21:34:39,462 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-11 21:34:39,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-11 21:34:39,542 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-11 21:34:39,543 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-11 21:34:39,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 98 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-11 21:34:39,558 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-11 21:34:42,053 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-11-11 21:34:42,163 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-11-11 21:34:42,269 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-11-11 21:34:42,380 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-11-11 21:34:42,789 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-11-11 21:34:42,958 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-11 21:34:43,316 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-11-11 21:34:43,464 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-11 21:34:43,479 INFO L131 LiptonReduction]: Checked pairs total: 1130 [2020-11-11 21:34:43,479 INFO L133 LiptonReduction]: Total number of compositions: 63 [2020-11-11 21:34:43,492 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-11 21:34:43,503 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:43,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-11 21:34:43,511 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:43,512 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-11 21:34:43,512 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:43,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:43,518 INFO L82 PathProgramCache]: Analyzing trace with hash -662580448, now seen corresponding path program 1 times [2020-11-11 21:34:43,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:43,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105323243] [2020-11-11 21:34:43,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:43,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105323243] [2020-11-11 21:34:43,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:34:43,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-11 21:34:43,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459840361] [2020-11-11 21:34:43,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-11 21:34:43,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:43,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-11 21:34:43,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-11 21:34:43,838 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 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 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:43,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:43,913 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-11 21:34:43,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-11 21:34:43,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2020-11-11 21:34:43,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:43,928 INFO L225 Difference]: With dead ends: 75 [2020-11-11 21:34:43,928 INFO L226 Difference]: Without dead ends: 42 [2020-11-11 21:34:43,929 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-11 21:34:43,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-11 21:34:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-11 21:34:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:43,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-11 21:34:43,974 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-11 21:34:43,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:43,975 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-11 21:34:43,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:43,975 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-11 21:34:43,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-11 21:34:43,976 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:43,976 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:43,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-11 21:34:43,976 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:43,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:43,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1697822740, now seen corresponding path program 1 times [2020-11-11 21:34:43,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:43,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222309268] [2020-11-11 21:34:43,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:44,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222309268] [2020-11-11 21:34:44,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:34:44,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-11 21:34:44,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174486297] [2020-11-11 21:34:44,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-11 21:34:44,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:44,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-11 21:34:44,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-11 21:34:44,066 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:44,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:44,102 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-11 21:34:44,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-11 21:34:44,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2020-11-11 21:34:44,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:44,104 INFO L225 Difference]: With dead ends: 56 [2020-11-11 21:34:44,104 INFO L226 Difference]: Without dead ends: 50 [2020-11-11 21:34:44,105 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:34:44,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-11 21:34:44,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-11 21:34:44,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:44,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-11 21:34:44,114 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-11 21:34:44,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:44,115 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-11 21:34:44,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:44,115 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-11 21:34:44,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:34:44,116 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:44,116 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:44,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-11 21:34:44,116 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:44,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:44,117 INFO L82 PathProgramCache]: Analyzing trace with hash 479902737, now seen corresponding path program 1 times [2020-11-11 21:34:44,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:44,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783664033] [2020-11-11 21:34:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:44,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783664033] [2020-11-11 21:34:44,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:34:44,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:34:44,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320336425] [2020-11-11 21:34:44,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:34:44,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:44,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:34:44,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:34:44,218 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:44,299 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-11-11 21:34:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 21:34:44,300 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2020-11-11 21:34:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:44,302 INFO L225 Difference]: With dead ends: 78 [2020-11-11 21:34:44,302 INFO L226 Difference]: Without dead ends: 71 [2020-11-11 21:34:44,302 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:34:44,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-11 21:34:44,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-11-11 21:34:44,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.511111111111111) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:44,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-11-11 21:34:44,312 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-11-11 21:34:44,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:44,312 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-11-11 21:34:44,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:44,313 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-11-11 21:34:44,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:34:44,314 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:44,314 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:44,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-11 21:34:44,314 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:44,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:44,315 INFO L82 PathProgramCache]: Analyzing trace with hash 479987367, now seen corresponding path program 2 times [2020-11-11 21:34:44,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:44,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356972600] [2020-11-11 21:34:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:44,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356972600] [2020-11-11 21:34:44,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:34:44,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:34:44,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830661789] [2020-11-11 21:34:44,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:34:44,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:44,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:34:44,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:34:44,408 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:44,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:44,501 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-11-11 21:34:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:34:44,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2020-11-11 21:34:44,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:44,502 INFO L225 Difference]: With dead ends: 54 [2020-11-11 21:34:44,502 INFO L226 Difference]: Without dead ends: 43 [2020-11-11 21:34:44,503 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:34:44,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-11 21:34:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-11-11 21:34:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-11-11 21:34:44,508 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-11-11 21:34:44,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:44,509 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-11-11 21:34:44,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:44,509 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-11-11 21:34:44,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:34:44,510 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:44,510 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:44,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-11 21:34:44,510 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:44,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1753602359, now seen corresponding path program 3 times [2020-11-11 21:34:44,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:44,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416545789] [2020-11-11 21:34:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:44,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416545789] [2020-11-11 21:34:44,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:34:44,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:34:44,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407589220] [2020-11-11 21:34:44,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:34:44,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:44,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:34:44,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:34:44,592 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:44,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:44,701 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-11-11 21:34:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:34:44,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2020-11-11 21:34:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:44,704 INFO L225 Difference]: With dead ends: 57 [2020-11-11 21:34:44,704 INFO L226 Difference]: Without dead ends: 51 [2020-11-11 21:34:44,705 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:34:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-11 21:34:44,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-11-11 21:34:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-11-11 21:34:44,711 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-11-11 21:34:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:44,712 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-11-11 21:34:44,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-11-11 21:34:44,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:34:44,713 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:44,713 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:44,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-11 21:34:44,713 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:44,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:44,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1994728946, now seen corresponding path program 4 times [2020-11-11 21:34:44,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:44,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237458406] [2020-11-11 21:34:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:44,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237458406] [2020-11-11 21:34:44,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499776511] [2020-11-11 21:34:44,821 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:44,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:34:44,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:44,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:34:44,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:44,967 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:34:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:44,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:44,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-11 21:34:44,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768410361] [2020-11-11 21:34:44,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 21:34:44,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:44,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 21:34:44,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-11 21:34:44,986 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:45,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:45,166 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-11-11 21:34:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 21:34:45,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 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 11 [2020-11-11 21:34:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:45,168 INFO L225 Difference]: With dead ends: 48 [2020-11-11 21:34:45,168 INFO L226 Difference]: Without dead ends: 43 [2020-11-11 21:34:45,169 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:34:45,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-11 21:34:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-11-11 21:34:45,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.484848484848485) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-11-11 21:34:45,174 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-11-11 21:34:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:45,175 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-11-11 21:34:45,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:45,175 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-11-11 21:34:45,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:34:45,176 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:45,176 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:45,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-11 21:34:45,389 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:45,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:45,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1390880661, now seen corresponding path program 5 times [2020-11-11 21:34:45,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:45,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747015413] [2020-11-11 21:34:45,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:45,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747015413] [2020-11-11 21:34:45,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46112485] [2020-11-11 21:34:45,519 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:45,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:34:45,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:45,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:34:45,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:45,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:45,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-11 21:34:45,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245767788] [2020-11-11 21:34:45,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 21:34:45,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:45,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 21:34:45,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-11 21:34:45,652 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:45,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:45,746 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-11-11 21:34:45,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 21:34:45,749 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2020-11-11 21:34:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:45,750 INFO L225 Difference]: With dead ends: 54 [2020-11-11 21:34:45,750 INFO L226 Difference]: Without dead ends: 48 [2020-11-11 21:34:45,751 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-11 21:34:45,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-11 21:34:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-11-11 21:34:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-11-11 21:34:45,768 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-11-11 21:34:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:45,768 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-11-11 21:34:45,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:45,769 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-11-11 21:34:45,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:34:45,770 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:45,770 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:45,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:45,985 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:45,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:45,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1472928981, now seen corresponding path program 6 times [2020-11-11 21:34:45,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:45,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930477216] [2020-11-11 21:34:45,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:46,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930477216] [2020-11-11 21:34:46,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109072206] [2020-11-11 21:34:46,049 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:46,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:34:46,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:46,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:34:46,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:46,174 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:34:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:46,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:46,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-11 21:34:46,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325042481] [2020-11-11 21:34:46,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 21:34:46,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:46,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 21:34:46,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-11 21:34:46,209 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:46,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:46,461 INFO L93 Difference]: Finished difference Result 66 states and 155 transitions. [2020-11-11 21:34:46,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:34:46,462 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 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 11 [2020-11-11 21:34:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:46,464 INFO L225 Difference]: With dead ends: 66 [2020-11-11 21:34:46,464 INFO L226 Difference]: Without dead ends: 57 [2020-11-11 21:34:46,468 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:34:46,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-11 21:34:46,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2020-11-11 21:34:46,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.5) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-11 21:34:46,481 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-11 21:34:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:46,481 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-11 21:34:46,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-11 21:34:46,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:34:46,483 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:46,483 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:46,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:46,700 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:46,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1625034124, now seen corresponding path program 7 times [2020-11-11 21:34:46,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:46,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483549149] [2020-11-11 21:34:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:46,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483549149] [2020-11-11 21:34:46,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646261017] [2020-11-11 21:34:46,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:46,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:34:46,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:46,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:46,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-11 21:34:46,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314126404] [2020-11-11 21:34:46,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 21:34:46,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:46,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 21:34:46,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-11 21:34:46,932 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:47,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:47,054 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-11-11 21:34:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-11 21:34:47,055 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2020-11-11 21:34:47,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:47,056 INFO L225 Difference]: With dead ends: 64 [2020-11-11 21:34:47,056 INFO L226 Difference]: Without dead ends: 58 [2020-11-11 21:34:47,056 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:34:47,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-11 21:34:47,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-11-11 21:34:47,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.477272727272727) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:47,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-11-11 21:34:47,062 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-11-11 21:34:47,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:47,062 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-11-11 21:34:47,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:47,063 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-11-11 21:34:47,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:34:47,064 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:47,064 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:47,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:47,277 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:47,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:47,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1707082444, now seen corresponding path program 8 times [2020-11-11 21:34:47,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:47,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565315460] [2020-11-11 21:34:47,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:47,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565315460] [2020-11-11 21:34:47,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750512751] [2020-11-11 21:34:47,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:47,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:34:47,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:47,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:34:47,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:47,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:47,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-11 21:34:47,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317362312] [2020-11-11 21:34:47,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:34:47,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:47,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:34:47,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:34:47,506 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:47,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:47,722 INFO L93 Difference]: Finished difference Result 59 states and 141 transitions. [2020-11-11 21:34:47,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:34:47,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 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 12 [2020-11-11 21:34:47,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:47,724 INFO L225 Difference]: With dead ends: 59 [2020-11-11 21:34:47,724 INFO L226 Difference]: Without dead ends: 50 [2020-11-11 21:34:47,724 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-11-11 21:34:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-11 21:34:47,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-11-11 21:34:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:47,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-11-11 21:34:47,729 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-11-11 21:34:47,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:47,729 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-11-11 21:34:47,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:47,729 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-11-11 21:34:47,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:34:47,730 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:47,730 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:47,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-11 21:34:47,932 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:47,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:47,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1583819388, now seen corresponding path program 9 times [2020-11-11 21:34:47,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:47,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166400837] [2020-11-11 21:34:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:48,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166400837] [2020-11-11 21:34:48,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163583233] [2020-11-11 21:34:48,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:48,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:34:48,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:48,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:34:48,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:48,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:34:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:48,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:48,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-11 21:34:48,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654678091] [2020-11-11 21:34:48,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:34:48,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:48,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:34:48,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:34:48,161 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:48,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:48,405 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-11-11 21:34:48,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:34:48,407 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 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 12 [2020-11-11 21:34:48,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:48,408 INFO L225 Difference]: With dead ends: 60 [2020-11-11 21:34:48,408 INFO L226 Difference]: Without dead ends: 55 [2020-11-11 21:34:48,408 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:34:48,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-11 21:34:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-11-11 21:34:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.511111111111111) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-11-11 21:34:48,413 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-11-11 21:34:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:48,413 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-11-11 21:34:48,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:48,413 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-11-11 21:34:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:34:48,414 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:48,414 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:48,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:48,624 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1379970669, now seen corresponding path program 10 times [2020-11-11 21:34:48,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:48,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933923886] [2020-11-11 21:34:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:48,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933923886] [2020-11-11 21:34:48,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877139049] [2020-11-11 21:34:48,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:48,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:34:48,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:48,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:34:48,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:48,835 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:34:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:48,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:48,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-11 21:34:48,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673443921] [2020-11-11 21:34:48,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 21:34:48,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:48,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 21:34:48,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-11 21:34:48,851 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:49,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:49,114 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-11-11 21:34:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:34:49,115 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 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 13 [2020-11-11 21:34:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:49,116 INFO L225 Difference]: With dead ends: 54 [2020-11-11 21:34:49,116 INFO L226 Difference]: Without dead ends: 49 [2020-11-11 21:34:49,117 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:34:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-11 21:34:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-11-11 21:34:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:49,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-11-11 21:34:49,121 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-11-11 21:34:49,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:49,121 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-11-11 21:34:49,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:49,122 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-11-11 21:34:49,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:34:49,122 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:49,122 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:49,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:49,332 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:49,333 INFO L82 PathProgramCache]: Analyzing trace with hash 901490704, now seen corresponding path program 11 times [2020-11-11 21:34:49,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:49,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416675763] [2020-11-11 21:34:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:49,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416675763] [2020-11-11 21:34:49,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538721002] [2020-11-11 21:34:49,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:49,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:34:49,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:49,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:34:49,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:49,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:49,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-11-11 21:34:49,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072308040] [2020-11-11 21:34:49,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:34:49,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:49,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:34:49,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:34:49,533 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:49,653 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-11-11 21:34:49,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-11 21:34:49,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2020-11-11 21:34:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:49,654 INFO L225 Difference]: With dead ends: 60 [2020-11-11 21:34:49,655 INFO L226 Difference]: Without dead ends: 54 [2020-11-11 21:34:49,655 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:34:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-11 21:34:49,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-11-11 21:34:49,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-11 21:34:49,659 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-11-11 21:34:49,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:49,659 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-11 21:34:49,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-11 21:34:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:34:49,660 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:49,661 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:49,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-11 21:34:49,872 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:49,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:49,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1853733510, now seen corresponding path program 12 times [2020-11-11 21:34:49,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:49,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794445201] [2020-11-11 21:34:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:49,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794445201] [2020-11-11 21:34:49,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475416043] [2020-11-11 21:34:49,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:50,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:34:50,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:50,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:34:50,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:50,071 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:34:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:50,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:50,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-11 21:34:50,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62283570] [2020-11-11 21:34:50,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 21:34:50,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:50,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 21:34:50,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-11 21:34:50,088 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:50,427 INFO L93 Difference]: Finished difference Result 75 states and 177 transitions. [2020-11-11 21:34:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:34:50,428 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 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 13 [2020-11-11 21:34:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:50,428 INFO L225 Difference]: With dead ends: 75 [2020-11-11 21:34:50,428 INFO L226 Difference]: Without dead ends: 66 [2020-11-11 21:34:50,429 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:34:50,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-11 21:34:50,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2020-11-11 21:34:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 48 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:50,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-11 21:34:50,434 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-11 21:34:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:50,435 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-11 21:34:50,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:50,435 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-11 21:34:50,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:34:50,435 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:50,436 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:50,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:50,645 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:50,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:50,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1710298041, now seen corresponding path program 13 times [2020-11-11 21:34:50,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:50,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448650894] [2020-11-11 21:34:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:50,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448650894] [2020-11-11 21:34:50,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256866068] [2020-11-11 21:34:50,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:50,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:34:50,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:50,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:50,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-11 21:34:50,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813548870] [2020-11-11 21:34:50,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 21:34:50,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:50,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 21:34:50,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-11 21:34:50,900 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:51,094 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-11-11 21:34:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:34:51,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2020-11-11 21:34:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:51,096 INFO L225 Difference]: With dead ends: 74 [2020-11-11 21:34:51,096 INFO L226 Difference]: Without dead ends: 68 [2020-11-11 21:34:51,097 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:34:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-11 21:34:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-11-11 21:34:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.5) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-11-11 21:34:51,102 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-11-11 21:34:51,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:51,102 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-11-11 21:34:51,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-11-11 21:34:51,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:34:51,103 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:51,103 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:51,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-11 21:34:51,315 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:51,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:51,316 INFO L82 PathProgramCache]: Analyzing trace with hash -170554959, now seen corresponding path program 14 times [2020-11-11 21:34:51,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:51,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127948035] [2020-11-11 21:34:51,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:51,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127948035] [2020-11-11 21:34:51,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148495426] [2020-11-11 21:34:51,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:51,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:34:51,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:51,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:34:51,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:51,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:51,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-11 21:34:51,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697718113] [2020-11-11 21:34:51,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:34:51,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:51,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:34:51,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:34:51,555 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:51,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:51,921 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2020-11-11 21:34:51,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:34:51,922 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 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 14 [2020-11-11 21:34:51,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:51,922 INFO L225 Difference]: With dead ends: 67 [2020-11-11 21:34:51,923 INFO L226 Difference]: Without dead ends: 58 [2020-11-11 21:34:51,923 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-11-11 21:34:51,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-11 21:34:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-11-11 21:34:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:51,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-11-11 21:34:51,929 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-11-11 21:34:51,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:51,929 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-11-11 21:34:51,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:51,930 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-11-11 21:34:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:34:51,930 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:51,930 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:52,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-11 21:34:52,139 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:52,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:52,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1631141505, now seen corresponding path program 15 times [2020-11-11 21:34:52,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:52,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351945466] [2020-11-11 21:34:52,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:52,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351945466] [2020-11-11 21:34:52,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143623021] [2020-11-11 21:34:52,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:52,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:34:52,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:52,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:34:52,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:52,318 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:34:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:52,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:52,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-11 21:34:52,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794263264] [2020-11-11 21:34:52,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:34:52,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:52,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:34:52,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:34:52,335 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:52,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:52,710 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-11-11 21:34:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:34:52,711 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 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 14 [2020-11-11 21:34:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:52,712 INFO L225 Difference]: With dead ends: 68 [2020-11-11 21:34:52,712 INFO L226 Difference]: Without dead ends: 63 [2020-11-11 21:34:52,713 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-11-11 21:34:52,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-11 21:34:52,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-11-11 21:34:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.5294117647058822) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:52,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-11-11 21:34:52,717 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-11-11 21:34:52,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:52,717 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-11-11 21:34:52,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-11-11 21:34:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:34:52,717 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:52,718 INFO L494 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:52,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-11 21:34:52,928 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:52,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:52,929 INFO L82 PathProgramCache]: Analyzing trace with hash -992213976, now seen corresponding path program 16 times [2020-11-11 21:34:52,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:52,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372499090] [2020-11-11 21:34:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:53,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372499090] [2020-11-11 21:34:53,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607175038] [2020-11-11 21:34:53,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:53,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:34:53,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:53,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:34:53,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:53,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:34:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:53,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:53,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 21:34:53,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907693131] [2020-11-11 21:34:53,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 21:34:53,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:53,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 21:34:53,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-11 21:34:53,146 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:53,522 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-11-11 21:34:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:34:53,523 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 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 15 [2020-11-11 21:34:53,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:53,523 INFO L225 Difference]: With dead ends: 60 [2020-11-11 21:34:53,523 INFO L226 Difference]: Without dead ends: 55 [2020-11-11 21:34:53,524 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:34:53,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-11 21:34:53,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-11-11 21:34:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 41 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-11-11 21:34:53,528 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-11-11 21:34:53,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:53,528 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-11-11 21:34:53,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:53,528 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-11-11 21:34:53,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:34:53,529 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:53,529 INFO L494 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:53,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-11 21:34:53,730 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:53,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:53,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1250822709, now seen corresponding path program 17 times [2020-11-11 21:34:53,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:53,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566990411] [2020-11-11 21:34:53,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:53,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566990411] [2020-11-11 21:34:53,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101933107] [2020-11-11 21:34:53,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:53,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 21:34:53,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:53,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:34:53,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:53,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:53,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-11-11 21:34:53,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750970344] [2020-11-11 21:34:53,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:34:53,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:53,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:34:53,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:34:53,936 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:54,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:54,100 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-11-11 21:34:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:34:54,100 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2020-11-11 21:34:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:54,102 INFO L225 Difference]: With dead ends: 66 [2020-11-11 21:34:54,103 INFO L226 Difference]: Without dead ends: 60 [2020-11-11 21:34:54,103 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:34:54,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-11 21:34:54,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-11-11 21:34:54,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.4693877551020407) internal successors, (121), 49 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:54,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-11-11 21:34:54,112 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-11-11 21:34:54,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:54,112 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-11-11 21:34:54,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:54,112 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-11-11 21:34:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:34:54,113 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:54,115 INFO L494 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:54,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:54,325 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:54,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:54,326 INFO L82 PathProgramCache]: Analyzing trace with hash 974248159, now seen corresponding path program 18 times [2020-11-11 21:34:54,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:54,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143793047] [2020-11-11 21:34:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:54,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143793047] [2020-11-11 21:34:54,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167363483] [2020-11-11 21:34:54,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:54,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 21:34:54,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:54,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:34:54,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:54,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:34:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:54,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:54,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 21:34:54,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031038484] [2020-11-11 21:34:54,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 21:34:54,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:54,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 21:34:54,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-11 21:34:54,566 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:55,016 INFO L93 Difference]: Finished difference Result 85 states and 201 transitions. [2020-11-11 21:34:55,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:34:55,017 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 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 15 [2020-11-11 21:34:55,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:55,018 INFO L225 Difference]: With dead ends: 85 [2020-11-11 21:34:55,018 INFO L226 Difference]: Without dead ends: 76 [2020-11-11 21:34:55,018 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:34:55,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-11 21:34:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2020-11-11 21:34:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.537037037037037) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-11 21:34:55,023 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-11 21:34:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:55,024 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-11 21:34:55,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:55,024 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-11 21:34:55,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-11 21:34:55,027 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:55,027 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:55,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:55,228 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:55,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:55,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1376061506, now seen corresponding path program 19 times [2020-11-11 21:34:55,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:55,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249044666] [2020-11-11 21:34:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:55,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249044666] [2020-11-11 21:34:55,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666855936] [2020-11-11 21:34:55,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:55,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:34:55,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:55,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:55,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-11 21:34:55,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266062514] [2020-11-11 21:34:55,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 21:34:55,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:55,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 21:34:55,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-11 21:34:55,475 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:55,737 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-11-11 21:34:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 21:34:55,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2020-11-11 21:34:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:55,739 INFO L225 Difference]: With dead ends: 84 [2020-11-11 21:34:55,739 INFO L226 Difference]: Without dead ends: 78 [2020-11-11 21:34:55,740 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:34:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-11 21:34:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-11-11 21:34:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.517857142857143) internal successors, (141), 56 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-11-11 21:34:55,744 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-11-11 21:34:55,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:55,744 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-11-11 21:34:55,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:55,744 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-11-11 21:34:55,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-11 21:34:55,745 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:55,745 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:55,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:55,956 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:55,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:55,956 INFO L82 PathProgramCache]: Analyzing trace with hash -693834922, now seen corresponding path program 20 times [2020-11-11 21:34:55,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:55,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833911270] [2020-11-11 21:34:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:56,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833911270] [2020-11-11 21:34:56,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296252451] [2020-11-11 21:34:56,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:56,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:34:56,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:56,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:34:56,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:56,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:34:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:56,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:56,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 21:34:56,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249034754] [2020-11-11 21:34:56,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:34:56,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:56,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:34:56,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:34:56,214 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:56,725 INFO L93 Difference]: Finished difference Result 77 states and 185 transitions. [2020-11-11 21:34:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 21:34:56,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 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 16 [2020-11-11 21:34:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:56,727 INFO L225 Difference]: With dead ends: 77 [2020-11-11 21:34:56,727 INFO L226 Difference]: Without dead ends: 68 [2020-11-11 21:34:56,728 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:34:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-11 21:34:56,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-11-11 21:34:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 44 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-11-11 21:34:56,731 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-11-11 21:34:56,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:56,731 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-11-11 21:34:56,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:56,731 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-11-11 21:34:56,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-11 21:34:56,732 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:56,732 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:56,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-11 21:34:56,934 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:56,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:56,934 INFO L82 PathProgramCache]: Analyzing trace with hash 136944314, now seen corresponding path program 21 times [2020-11-11 21:34:56,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:56,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605033142] [2020-11-11 21:34:56,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:57,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605033142] [2020-11-11 21:34:57,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168742723] [2020-11-11 21:34:57,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:57,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 21:34:57,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:57,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:34:57,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:57,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:34:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:57,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:57,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 21:34:57,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425219585] [2020-11-11 21:34:57,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:34:57,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:57,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:34:57,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:34:57,180 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:57,688 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-11-11 21:34:57,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 21:34:57,689 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 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 16 [2020-11-11 21:34:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:57,690 INFO L225 Difference]: With dead ends: 76 [2020-11-11 21:34:57,690 INFO L226 Difference]: Without dead ends: 71 [2020-11-11 21:34:57,691 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:34:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-11 21:34:57,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-11-11 21:34:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.543859649122807) internal successors, (145), 57 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-11-11 21:34:57,700 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-11-11 21:34:57,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:57,700 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-11-11 21:34:57,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,701 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-11-11 21:34:57,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-11 21:34:57,701 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:57,701 INFO L494 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:57,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-11 21:34:57,904 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:57,904 INFO L82 PathProgramCache]: Analyzing trace with hash -34023645, now seen corresponding path program 22 times [2020-11-11 21:34:57,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:57,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200291858] [2020-11-11 21:34:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:58,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200291858] [2020-11-11 21:34:58,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981383372] [2020-11-11 21:34:58,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:58,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:34:58,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:58,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 21:34:58,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:58,165 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:34:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:58,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:58,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 21:34:58,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039322985] [2020-11-11 21:34:58,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 21:34:58,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:58,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 21:34:58,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:34:58,185 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:58,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:58,745 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-11-11 21:34:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 21:34:58,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 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 17 [2020-11-11 21:34:58,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:58,747 INFO L225 Difference]: With dead ends: 66 [2020-11-11 21:34:58,747 INFO L226 Difference]: Without dead ends: 61 [2020-11-11 21:34:58,748 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-11-11 21:34:58,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-11 21:34:58,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-11-11 21:34:58,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:58,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-11-11 21:34:58,752 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-11-11 21:34:58,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:58,752 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-11-11 21:34:58,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:58,752 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-11-11 21:34:58,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-11 21:34:58,753 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:58,753 INFO L494 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:58,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-11 21:34:58,955 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:58,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:58,956 INFO L82 PathProgramCache]: Analyzing trace with hash 550224070, now seen corresponding path program 23 times [2020-11-11 21:34:58,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:58,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165297118] [2020-11-11 21:34:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:59,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165297118] [2020-11-11 21:34:59,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932063572] [2020-11-11 21:34:59,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:59,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 21:34:59,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:59,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 21:34:59,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:59,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:59,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-11 21:34:59,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695337007] [2020-11-11 21:34:59,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:34:59,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:59,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:34:59,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:34:59,178 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:59,434 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-11-11 21:34:59,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 21:34:59,435 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2020-11-11 21:34:59,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:59,436 INFO L225 Difference]: With dead ends: 72 [2020-11-11 21:34:59,436 INFO L226 Difference]: Without dead ends: 66 [2020-11-11 21:34:59,436 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-11-11 21:34:59,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-11 21:34:59,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-11-11 21:34:59,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 53 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:59,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-11-11 21:34:59,440 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-11-11 21:34:59,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:59,440 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-11-11 21:34:59,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:59,440 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-11-11 21:34:59,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-11 21:34:59,440 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:59,440 INFO L494 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:59,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-11 21:34:59,645 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:59,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:59,645 INFO L82 PathProgramCache]: Analyzing trace with hash -49666300, now seen corresponding path program 24 times [2020-11-11 21:34:59,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:59,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127290345] [2020-11-11 21:34:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:59,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127290345] [2020-11-11 21:34:59,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689083274] [2020-11-11 21:34:59,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:59,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 21:34:59,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:59,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 21:34:59,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:59,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:34:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:59,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:59,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 21:34:59,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612606546] [2020-11-11 21:34:59,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 21:34:59,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:59,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 21:34:59,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:34:59,905 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:00,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:00,511 INFO L93 Difference]: Finished difference Result 95 states and 225 transitions. [2020-11-11 21:35:00,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:35:00,513 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 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 17 [2020-11-11 21:35:00,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:00,514 INFO L225 Difference]: With dead ends: 95 [2020-11-11 21:35:00,515 INFO L226 Difference]: Without dead ends: 86 [2020-11-11 21:35:00,515 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:35:00,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-11 21:35:00,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-11-11 21:35:00,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.55) internal successors, (153), 60 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:00,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-11 21:35:00,519 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-11 21:35:00,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:00,519 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-11 21:35:00,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-11 21:35:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-11 21:35:00,520 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:00,520 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:00,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-11 21:35:00,728 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:00,728 INFO L82 PathProgramCache]: Analyzing trace with hash -454815363, now seen corresponding path program 25 times [2020-11-11 21:35:00,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:00,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267601723] [2020-11-11 21:35:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-11 21:35:00,742 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-11 21:35:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-11 21:35:00,755 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-11 21:35:00,782 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-11 21:35:00,782 INFO L595 BasicCegarLoop]: Counterexample might be feasible [2020-11-11 21:35:00,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-11 21:35:00,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.11 09:35:00 BasicIcfg [2020-11-11 21:35:00,865 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-11 21:35:00,866 INFO L168 Benchmark]: Toolchain (without parser) took 23065.01 ms. Allocated memory was 302.0 MB in the beginning and 436.2 MB in the end (delta: 134.2 MB). Free memory was 276.8 MB in the beginning and 193.9 MB in the end (delta: 82.9 MB). Peak memory consumption was 218.8 MB. Max. memory is 16.0 GB. [2020-11-11 21:35:00,866 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 302.0 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 21:35:00,867 INFO L168 Benchmark]: CACSL2BoogieTranslator took 608.39 ms. Allocated memory is still 302.0 MB. Free memory was 276.2 MB in the beginning and 247.4 MB in the end (delta: 28.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. [2020-11-11 21:35:00,867 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.44 ms. Allocated memory is still 302.0 MB. Free memory was 247.4 MB in the beginning and 245.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 21:35:00,868 INFO L168 Benchmark]: Boogie Preprocessor took 31.22 ms. Allocated memory is still 302.0 MB. Free memory was 245.5 MB in the beginning and 244.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 21:35:00,868 INFO L168 Benchmark]: RCFGBuilder took 745.90 ms. Allocated memory is still 302.0 MB. Free memory was 244.0 MB in the beginning and 267.2 MB in the end (delta: -23.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.0 GB. [2020-11-11 21:35:00,869 INFO L168 Benchmark]: TraceAbstraction took 21612.62 ms. Allocated memory was 302.0 MB in the beginning and 436.2 MB in the end (delta: 134.2 MB). Free memory was 267.2 MB in the beginning and 193.9 MB in the end (delta: 73.3 MB). Peak memory consumption was 207.5 MB. Max. memory is 16.0 GB. [2020-11-11 21:35:00,871 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 302.0 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 608.39 ms. Allocated memory is still 302.0 MB. Free memory was 276.2 MB in the beginning and 247.4 MB in the end (delta: 28.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 49.44 ms. Allocated memory is still 302.0 MB. Free memory was 247.4 MB in the beginning and 245.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 31.22 ms. Allocated memory is still 302.0 MB. Free memory was 245.5 MB in the beginning and 244.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 745.90 ms. Allocated memory is still 302.0 MB. Free memory was 244.0 MB in the beginning and 267.2 MB in the end (delta: -23.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 21612.62 ms. Allocated memory was 302.0 MB in the beginning and 436.2 MB in the end (delta: 134.2 MB). Free memory was 267.2 MB in the beginning and 193.9 MB in the end (delta: 73.3 MB). Peak memory consumption was 207.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 777 VarBasedMoverChecksPositive, 15 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 15 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 21 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.0s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 3 ChoiceCompositions, 63 TotalNumberOfCompositions, 1130 MoverChecksTotal - CounterExampleResult [Line: 685]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L686] 0 int i = 3, j = 6; [L704] 0 pthread_t id1, id2; [L705] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L688] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L688] COND TRUE 1 k < 5 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L706] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L708] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L696] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L696] COND TRUE 2 k < 5 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L688] COND TRUE 1 k < 5 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L696] COND TRUE 2 k < 5 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L688] COND TRUE 1 k < 5 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L696] COND TRUE 2 k < 5 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L688] COND TRUE 1 k < 5 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L696] COND TRUE 2 k < 5 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L688] COND TRUE 1 k < 5 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L696] COND TRUE 2 k < 5 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L711] 0 int condJ = j >= (2*5 +6); [L713] COND TRUE 0 condI || condJ [L685] COND FALSE 0 !(0) [L685] 0 __assert_fail ("0", "triangular-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 21.3s, OverallIterations: 27, TraceHistogramMax: 5, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.0s, HoareTripleCheckerStatistics: 390 SDtfs, 1044 SDslu, 1234 SDs, 0 SdLazy, 1355 SolverSat, 565 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 684 GetRequests, 238 SyntacticMatches, 21 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 26 MinimizatonAttempts, 351 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 650 NumberOfCodeBlocks, 650 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 585 ConstructedInterpolants, 0 QuantifiedInterpolants, 32225 SizeOfPredicates, 126 NumberOfNonLiveVariables, 2268 ConjunctsInSsa, 212 ConjunctsInUnsatCore, 47 InterpolantComputations, 5 PerfectInterpolantSequences, 0/300 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...