/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 11:46:45,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 11:46:45,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 11:46:45,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 11:46:45,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 11:46:45,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 11:46:45,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 11:46:45,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 11:46:45,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 11:46:45,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 11:46:45,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 11:46:45,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 11:46:45,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 11:46:45,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 11:46:45,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 11:46:45,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 11:46:45,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 11:46:45,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 11:46:45,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 11:46:45,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 11:46:45,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 11:46:45,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 11:46:45,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 11:46:45,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 11:46:45,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-18 11:46:45,189 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 11:46:45,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 11:46:45,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 11:46:45,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 11:46:45,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 11:46:45,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 11:46:45,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 11:46:45,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 11:46:45,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 11:46:45,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 11:46:45,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 11:46:45,196 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-18 11:46:45,209 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 11:46:45,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 11:46:45,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 11:46:45,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 11:46:45,211 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 11:46:45,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 11:46:45,211 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 11:46:45,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 11:46:45,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 11:46:45,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 11:46:45,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 11:46:45,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 11:46:45,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 11:46:45,213 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 11:46:45,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 11:46:45,213 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 11:46:45,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 11:46:45,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 11:46:45,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 11:46:45,214 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 11:46:45,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 11:46:45,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 11:46:45,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 11:46:45,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 11:46:45,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 11:46:45,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 11:46:45,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 11:46:45,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 11:46:45,216 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-18 11:46:45,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 11:46:45,508 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 11:46:45,523 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 11:46:45,527 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 11:46:45,528 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 11:46:45,529 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 11:46:45,530 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2019-12-18 11:46:45,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90aeff7ee/0a29e6a647d64bff974590a70462df66/FLAG75e166e73 [2019-12-18 11:46:46,201 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 11:46:46,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2019-12-18 11:46:46,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90aeff7ee/0a29e6a647d64bff974590a70462df66/FLAG75e166e73 [2019-12-18 11:46:46,467 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90aeff7ee/0a29e6a647d64bff974590a70462df66 [2019-12-18 11:46:46,476 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 11:46:46,479 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 11:46:46,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 11:46:46,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 11:46:46,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 11:46:46,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:46:46" (1/1) ... [2019-12-18 11:46:46,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@632ced85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:46, skipping insertion in model container [2019-12-18 11:46:46,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:46:46" (1/1) ... [2019-12-18 11:46:46,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 11:46:46,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 11:46:47,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 11:46:47,080 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 11:46:47,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 11:46:47,205 INFO L208 MainTranslator]: Completed translation [2019-12-18 11:46:47,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:47 WrapperNode [2019-12-18 11:46:47,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 11:46:47,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 11:46:47,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 11:46:47,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 11:46:47,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:47" (1/1) ... [2019-12-18 11:46:47,248 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:47" (1/1) ... [2019-12-18 11:46:47,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 11:46:47,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 11:46:47,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 11:46:47,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 11:46:47,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:47" (1/1) ... [2019-12-18 11:46:47,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:47" (1/1) ... [2019-12-18 11:46:47,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:47" (1/1) ... [2019-12-18 11:46:47,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:47" (1/1) ... [2019-12-18 11:46:47,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:47" (1/1) ... [2019-12-18 11:46:47,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:47" (1/1) ... [2019-12-18 11:46:47,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:47" (1/1) ... [2019-12-18 11:46:47,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 11:46:47,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 11:46:47,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 11:46:47,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 11:46:47,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:47" (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 [2019-12-18 11:46:47,356 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 11:46:47,356 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 11:46:47,356 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 11:46:47,357 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 11:46:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 11:46:47,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 11:46:47,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 11:46:47,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 11:46:47,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 11:46:47,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 11:46:47,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 11:46:47,364 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-18 11:46:47,723 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 11:46:47,723 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 11:46:47,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:46:47 BoogieIcfgContainer [2019-12-18 11:46:47,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 11:46:47,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 11:46:47,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 11:46:47,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 11:46:47,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 11:46:46" (1/3) ... [2019-12-18 11:46:47,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f12c76f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:46:47, skipping insertion in model container [2019-12-18 11:46:47,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:46:47" (2/3) ... [2019-12-18 11:46:47,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f12c76f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:46:47, skipping insertion in model container [2019-12-18 11:46:47,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:46:47" (3/3) ... [2019-12-18 11:46:47,733 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2019-12-18 11:46:47,743 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 11:46:47,744 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 11:46:47,751 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 11:46:47,752 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 11:46:47,777 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,777 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,778 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,778 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,779 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,779 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,779 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,779 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,780 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,780 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,780 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,781 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,781 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,781 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,782 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,782 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,782 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,783 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,783 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,783 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,784 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,784 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,784 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,785 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,785 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,785 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,786 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,786 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,792 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,792 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,792 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,793 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,793 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,793 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,799 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,799 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,799 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,800 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,800 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,800 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:46:47,814 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 11:46:47,830 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 11:46:47,831 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 11:46:47,831 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 11:46:47,831 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 11:46:47,831 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 11:46:47,831 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 11:46:47,831 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 11:46:47,831 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 11:46:47,842 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-12-18 11:46:47,844 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-18 11:46:47,880 INFO L126 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-18 11:46:47,881 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 11:46:47,889 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs. 6/49 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-18 11:46:47,892 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-18 11:46:47,907 INFO L126 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-18 11:46:47,908 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 11:46:47,909 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs. 6/49 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-18 11:46:47,911 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-12-18 11:46:47,912 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-18 11:46:48,995 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-12-18 11:46:49,141 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-12-18 11:46:49,142 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-12-18 11:46:49,145 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-18 11:46:49,152 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-18 11:46:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-18 11:46:49,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-18 11:46:49,159 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:49,160 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-18 11:46:49,161 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:49,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:49,167 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-12-18 11:46:49,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:49,176 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715136523] [2019-12-18 11:46:49,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:49,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715136523] [2019-12-18 11:46:49,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:46:49,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-18 11:46:49,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780204121] [2019-12-18 11:46:49,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 11:46:49,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:49,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 11:46:49,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:46:49,410 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-18 11:46:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:49,454 INFO L93 Difference]: Finished difference Result 48 states and 115 transitions. [2019-12-18 11:46:49,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 11:46:49,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-18 11:46:49,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:49,484 INFO L225 Difference]: With dead ends: 48 [2019-12-18 11:46:49,484 INFO L226 Difference]: Without dead ends: 28 [2019-12-18 11:46:49,486 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:46:49,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-18 11:46:49,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-18 11:46:49,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-18 11:46:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2019-12-18 11:46:49,525 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 5 [2019-12-18 11:46:49,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:49,525 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2019-12-18 11:46:49,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 11:46:49,526 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2019-12-18 11:46:49,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 11:46:49,527 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:49,527 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:49,527 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:49,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:49,528 INFO L82 PathProgramCache]: Analyzing trace with hash 232906128, now seen corresponding path program 1 times [2019-12-18 11:46:49,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:49,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936095684] [2019-12-18 11:46:49,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:49,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936095684] [2019-12-18 11:46:49,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:46:49,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 11:46:49,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376929551] [2019-12-18 11:46:49,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 11:46:49,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:49,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 11:46:49,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:46:49,618 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand 4 states. [2019-12-18 11:46:49,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:49,635 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-18 11:46:49,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 11:46:49,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 11:46:49,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:49,637 INFO L225 Difference]: With dead ends: 34 [2019-12-18 11:46:49,637 INFO L226 Difference]: Without dead ends: 30 [2019-12-18 11:46:49,638 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 11:46:49,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-18 11:46:49,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-18 11:46:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-18 11:46:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-18 11:46:49,644 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 7 [2019-12-18 11:46:49,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:49,645 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-18 11:46:49,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 11:46:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-18 11:46:49,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:46:49,646 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:49,646 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:49,646 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:49,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:49,647 INFO L82 PathProgramCache]: Analyzing trace with hash 484474390, now seen corresponding path program 1 times [2019-12-18 11:46:49,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:49,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653148785] [2019-12-18 11:46:49,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:49,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653148785] [2019-12-18 11:46:49,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:46:49,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:46:49,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78156249] [2019-12-18 11:46:49,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 11:46:49,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:49,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 11:46:49,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:46:49,734 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 5 states. [2019-12-18 11:46:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:49,767 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-18 11:46:49,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 11:46:49,771 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 11:46:49,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:49,772 INFO L225 Difference]: With dead ends: 34 [2019-12-18 11:46:49,772 INFO L226 Difference]: Without dead ends: 28 [2019-12-18 11:46:49,772 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-18 11:46:49,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-18 11:46:49,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-12-18 11:46:49,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-18 11:46:49,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-18 11:46:49,777 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 9 [2019-12-18 11:46:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:49,778 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-18 11:46:49,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 11:46:49,778 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-18 11:46:49,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:46:49,779 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:49,779 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:49,779 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:49,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:49,779 INFO L82 PathProgramCache]: Analyzing trace with hash 483962890, now seen corresponding path program 2 times [2019-12-18 11:46:49,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:49,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340163691] [2019-12-18 11:46:49,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:49,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340163691] [2019-12-18 11:46:49,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:46:49,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:46:49,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716863690] [2019-12-18 11:46:49,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 11:46:49,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:49,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 11:46:49,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-18 11:46:49,838 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 5 states. [2019-12-18 11:46:49,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:49,874 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-18 11:46:49,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 11:46:49,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 11:46:49,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:49,876 INFO L225 Difference]: With dead ends: 32 [2019-12-18 11:46:49,876 INFO L226 Difference]: Without dead ends: 28 [2019-12-18 11:46:49,876 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-18 11:46:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-18 11:46:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-18 11:46:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-18 11:46:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-18 11:46:49,881 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 9 [2019-12-18 11:46:49,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:49,882 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-18 11:46:49,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 11:46:49,882 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-18 11:46:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:46:49,883 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:49,883 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:49,883 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:49,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:49,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2133804259, now seen corresponding path program 3 times [2019-12-18 11:46:49,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:49,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108520215] [2019-12-18 11:46:49,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:49,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108520215] [2019-12-18 11:46:49,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225828089] [2019-12-18 11:46:49,981 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 11:46:50,045 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 11:46:50,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:50,047 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:46:50,052 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:50,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:50,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-18 11:46:50,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577606802] [2019-12-18 11:46:50,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-18 11:46:50,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:50,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-18 11:46:50,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-18 11:46:50,083 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 7 states. [2019-12-18 11:46:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:50,180 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-18 11:46:50,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:46:50,180 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-18 11:46:50,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:50,181 INFO L225 Difference]: With dead ends: 32 [2019-12-18 11:46:50,181 INFO L226 Difference]: Without dead ends: 29 [2019-12-18 11:46:50,182 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:46:50,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-18 11:46:50,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-12-18 11:46:50,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-18 11:46:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-18 11:46:50,186 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 10 [2019-12-18 11:46:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:50,187 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-18 11:46:50,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-18 11:46:50,187 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-18 11:46:50,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 11:46:50,187 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:50,187 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:50,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:50,389 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:50,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:50,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2117948007, now seen corresponding path program 4 times [2019-12-18 11:46:50,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:50,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417024089] [2019-12-18 11:46:50,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:50,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417024089] [2019-12-18 11:46:50,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898300209] [2019-12-18 11:46:50,454 INFO L92 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 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 [2019-12-18 11:46:50,500 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:46:50,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:50,501 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:46:50,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:50,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:50,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-18 11:46:50,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695702180] [2019-12-18 11:46:50,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-18 11:46:50,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:50,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-18 11:46:50,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-18 11:46:50,520 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 7 states. [2019-12-18 11:46:50,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:50,596 INFO L93 Difference]: Finished difference Result 33 states and 68 transitions. [2019-12-18 11:46:50,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 11:46:50,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-18 11:46:50,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:50,597 INFO L225 Difference]: With dead ends: 33 [2019-12-18 11:46:50,597 INFO L226 Difference]: Without dead ends: 30 [2019-12-18 11:46:50,597 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:46:50,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-18 11:46:50,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-18 11:46:50,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-18 11:46:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-18 11:46:50,602 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 10 [2019-12-18 11:46:50,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:50,603 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-18 11:46:50,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-18 11:46:50,603 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-18 11:46:50,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:46:50,604 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:50,604 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:50,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:50,808 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:50,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:50,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1723422894, now seen corresponding path program 5 times [2019-12-18 11:46:50,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:50,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283550919] [2019-12-18 11:46:50,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:50,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283550919] [2019-12-18 11:46:50,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457514641] [2019-12-18 11:46:50,968 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:51,020 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:46:51,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:51,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:46:51,022 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:51,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:51,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-18 11:46:51,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124889382] [2019-12-18 11:46:51,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:46:51,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:51,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:46:51,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:46:51,036 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 8 states. [2019-12-18 11:46:51,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:51,155 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-18 11:46:51,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:46:51,155 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-18 11:46:51,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:51,156 INFO L225 Difference]: With dead ends: 34 [2019-12-18 11:46:51,157 INFO L226 Difference]: Without dead ends: 31 [2019-12-18 11:46:51,157 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:46:51,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-18 11:46:51,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-12-18 11:46:51,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-18 11:46:51,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 48 transitions. [2019-12-18 11:46:51,162 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 48 transitions. Word has length 11 [2019-12-18 11:46:51,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:51,163 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 48 transitions. [2019-12-18 11:46:51,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:46:51,163 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 48 transitions. [2019-12-18 11:46:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:46:51,163 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:51,164 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:51,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:51,367 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:51,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:51,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1231878834, now seen corresponding path program 6 times [2019-12-18 11:46:51,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:51,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018956326] [2019-12-18 11:46:51,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:51,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018956326] [2019-12-18 11:46:51,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802622159] [2019-12-18 11:46:51,462 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 11:46:51,506 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 11:46:51,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:51,507 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 11:46:51,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:51,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:51,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-18 11:46:51,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719100849] [2019-12-18 11:46:51,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:46:51,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:51,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:46:51,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-18 11:46:51,527 INFO L87 Difference]: Start difference. First operand 23 states and 48 transitions. Second operand 8 states. [2019-12-18 11:46:51,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:51,612 INFO L93 Difference]: Finished difference Result 35 states and 72 transitions. [2019-12-18 11:46:51,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:46:51,612 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-18 11:46:51,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:51,613 INFO L225 Difference]: With dead ends: 35 [2019-12-18 11:46:51,613 INFO L226 Difference]: Without dead ends: 32 [2019-12-18 11:46:51,614 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:46:51,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-18 11:46:51,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-18 11:46:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-18 11:46:51,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-18 11:46:51,621 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 11 [2019-12-18 11:46:51,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:51,621 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-18 11:46:51,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:46:51,621 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-18 11:46:51,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:46:51,625 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:51,625 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:51,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:51,830 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:51,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:51,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1886502219, now seen corresponding path program 7 times [2019-12-18 11:46:51,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:51,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415470259] [2019-12-18 11:46:51,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:51,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415470259] [2019-12-18 11:46:51,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505260661] [2019-12-18 11:46:51,903 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:51,962 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:46:51,964 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:52,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:52,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-18 11:46:52,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41373457] [2019-12-18 11:46:52,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-18 11:46:52,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:52,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-18 11:46:52,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-18 11:46:52,009 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 9 states. [2019-12-18 11:46:52,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:52,095 INFO L93 Difference]: Finished difference Result 36 states and 74 transitions. [2019-12-18 11:46:52,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 11:46:52,096 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-18 11:46:52,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:52,097 INFO L225 Difference]: With dead ends: 36 [2019-12-18 11:46:52,097 INFO L226 Difference]: Without dead ends: 33 [2019-12-18 11:46:52,097 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:46:52,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-18 11:46:52,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2019-12-18 11:46:52,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-18 11:46:52,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 50 transitions. [2019-12-18 11:46:52,101 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 50 transitions. Word has length 12 [2019-12-18 11:46:52,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:52,101 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 50 transitions. [2019-12-18 11:46:52,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-18 11:46:52,101 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 50 transitions. [2019-12-18 11:46:52,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 11:46:52,102 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:52,102 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:52,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:52,307 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:52,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:52,307 INFO L82 PathProgramCache]: Analyzing trace with hash -466461505, now seen corresponding path program 8 times [2019-12-18 11:46:52,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:52,308 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145512099] [2019-12-18 11:46:52,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:52,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145512099] [2019-12-18 11:46:52,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340497063] [2019-12-18 11:46:52,365 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:52,415 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:46:52,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:52,416 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 11:46:52,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:52,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:52,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-18 11:46:52,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799477049] [2019-12-18 11:46:52,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-18 11:46:52,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:52,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-18 11:46:52,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-18 11:46:52,435 INFO L87 Difference]: Start difference. First operand 24 states and 50 transitions. Second operand 9 states. [2019-12-18 11:46:52,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:52,540 INFO L93 Difference]: Finished difference Result 37 states and 76 transitions. [2019-12-18 11:46:52,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:46:52,540 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-18 11:46:52,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:52,551 INFO L225 Difference]: With dead ends: 37 [2019-12-18 11:46:52,552 INFO L226 Difference]: Without dead ends: 34 [2019-12-18 11:46:52,553 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:46:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-18 11:46:52,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-18 11:46:52,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-18 11:46:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-18 11:46:52,559 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2019-12-18 11:46:52,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:52,559 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-18 11:46:52,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-18 11:46:52,559 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-18 11:46:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:46:52,561 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:52,561 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:52,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:52,762 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:52,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:52,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973050, now seen corresponding path program 9 times [2019-12-18 11:46:52,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:52,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352361897] [2019-12-18 11:46:52,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:52,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352361897] [2019-12-18 11:46:52,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840824881] [2019-12-18 11:46:52,841 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:52,889 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 11:46:52,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:52,890 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:46:52,892 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:52,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:52,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-18 11:46:52,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985090705] [2019-12-18 11:46:52,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:46:52,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:52,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:46:52,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:46:52,917 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 10 states. [2019-12-18 11:46:53,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:53,051 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-12-18 11:46:53,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:46:53,052 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-18 11:46:53,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:53,053 INFO L225 Difference]: With dead ends: 38 [2019-12-18 11:46:53,053 INFO L226 Difference]: Without dead ends: 35 [2019-12-18 11:46:53,054 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:46:53,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-18 11:46:53,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2019-12-18 11:46:53,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-18 11:46:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 52 transitions. [2019-12-18 11:46:53,057 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 52 transitions. Word has length 13 [2019-12-18 11:46:53,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:53,058 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 52 transitions. [2019-12-18 11:46:53,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:46:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 52 transitions. [2019-12-18 11:46:53,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 11:46:53,059 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:53,059 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:53,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:53,263 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:53,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:53,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1575404710, now seen corresponding path program 10 times [2019-12-18 11:46:53,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:53,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704578993] [2019-12-18 11:46:53,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:53,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704578993] [2019-12-18 11:46:53,321 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228823539] [2019-12-18 11:46:53,321 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:53,379 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:46:53,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:53,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 11:46:53,381 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:53,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:53,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-18 11:46:53,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069718802] [2019-12-18 11:46:53,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 11:46:53,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:53,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 11:46:53,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-18 11:46:53,396 INFO L87 Difference]: Start difference. First operand 25 states and 52 transitions. Second operand 10 states. [2019-12-18 11:46:53,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:53,519 INFO L93 Difference]: Finished difference Result 39 states and 80 transitions. [2019-12-18 11:46:53,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:46:53,520 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-18 11:46:53,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:53,520 INFO L225 Difference]: With dead ends: 39 [2019-12-18 11:46:53,520 INFO L226 Difference]: Without dead ends: 36 [2019-12-18 11:46:53,521 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-12-18 11:46:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-18 11:46:53,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-18 11:46:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-18 11:46:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-18 11:46:53,525 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 13 [2019-12-18 11:46:53,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:53,525 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-18 11:46:53,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 11:46:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-18 11:46:53,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:46:53,526 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:53,526 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:53,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:53,729 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:53,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:53,729 INFO L82 PathProgramCache]: Analyzing trace with hash 452443059, now seen corresponding path program 11 times [2019-12-18 11:46:53,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:53,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242398417] [2019-12-18 11:46:53,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:53,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242398417] [2019-12-18 11:46:53,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873833117] [2019-12-18 11:46:53,819 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:53,865 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 11:46:53,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:53,866 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:46:53,868 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:53,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:53,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-18 11:46:53,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377313874] [2019-12-18 11:46:53,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-18 11:46:53,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:53,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-18 11:46:53,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-18 11:46:53,890 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 11 states. [2019-12-18 11:46:54,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:54,027 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-12-18 11:46:54,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 11:46:54,028 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-18 11:46:54,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:54,029 INFO L225 Difference]: With dead ends: 40 [2019-12-18 11:46:54,029 INFO L226 Difference]: Without dead ends: 37 [2019-12-18 11:46:54,030 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2019-12-18 11:46:54,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-18 11:46:54,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-12-18 11:46:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-18 11:46:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-12-18 11:46:54,034 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 14 [2019-12-18 11:46:54,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:54,034 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-12-18 11:46:54,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-18 11:46:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-12-18 11:46:54,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 11:46:54,035 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:54,035 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:54,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:54,239 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:54,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1592905449, now seen corresponding path program 12 times [2019-12-18 11:46:54,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:54,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681436011] [2019-12-18 11:46:54,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:54,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681436011] [2019-12-18 11:46:54,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490617964] [2019-12-18 11:46:54,313 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:54,381 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 11:46:54,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:54,382 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 11:46:54,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:54,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:54,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-18 11:46:54,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510407319] [2019-12-18 11:46:54,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-18 11:46:54,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:54,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-18 11:46:54,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-18 11:46:54,409 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 11 states. [2019-12-18 11:46:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:54,562 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-12-18 11:46:54,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 11:46:54,568 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-18 11:46:54,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:54,568 INFO L225 Difference]: With dead ends: 41 [2019-12-18 11:46:54,569 INFO L226 Difference]: Without dead ends: 38 [2019-12-18 11:46:54,569 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-12-18 11:46:54,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-18 11:46:54,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-18 11:46:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-18 11:46:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-18 11:46:54,573 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 14 [2019-12-18 11:46:54,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:54,573 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-18 11:46:54,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-18 11:46:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-18 11:46:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 11:46:54,574 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:54,574 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:54,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:54,778 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:54,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:54,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1140833246, now seen corresponding path program 13 times [2019-12-18 11:46:54,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:54,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587727745] [2019-12-18 11:46:54,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:54,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587727745] [2019-12-18 11:46:54,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138389078] [2019-12-18 11:46:54,862 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:54,908 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:46:54,909 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:54,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:54,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-18 11:46:54,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993343085] [2019-12-18 11:46:54,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:46:54,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:54,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:46:54,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:46:54,931 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 12 states. [2019-12-18 11:46:55,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:55,112 INFO L93 Difference]: Finished difference Result 42 states and 86 transitions. [2019-12-18 11:46:55,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:46:55,114 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-18 11:46:55,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:55,115 INFO L225 Difference]: With dead ends: 42 [2019-12-18 11:46:55,115 INFO L226 Difference]: Without dead ends: 39 [2019-12-18 11:46:55,115 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:46:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-18 11:46:55,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2019-12-18 11:46:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-18 11:46:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2019-12-18 11:46:55,120 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 15 [2019-12-18 11:46:55,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:55,120 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2019-12-18 11:46:55,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:46:55,120 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2019-12-18 11:46:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 11:46:55,121 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:55,121 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:55,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:55,322 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:55,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:55,323 INFO L82 PathProgramCache]: Analyzing trace with hash -2135428606, now seen corresponding path program 14 times [2019-12-18 11:46:55,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:55,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431108245] [2019-12-18 11:46:55,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:55,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431108245] [2019-12-18 11:46:55,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900467890] [2019-12-18 11:46:55,405 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:55,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:46:55,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:55,480 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 11:46:55,482 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:55,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:55,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-18 11:46:55,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319442872] [2019-12-18 11:46:55,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 11:46:55,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:55,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 11:46:55,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 11:46:55,509 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand 12 states. [2019-12-18 11:46:55,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:55,679 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2019-12-18 11:46:55,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 11:46:55,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-18 11:46:55,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:55,680 INFO L225 Difference]: With dead ends: 43 [2019-12-18 11:46:55,681 INFO L226 Difference]: Without dead ends: 40 [2019-12-18 11:46:55,681 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:46:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-18 11:46:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-18 11:46:55,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-18 11:46:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2019-12-18 11:46:55,690 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 15 [2019-12-18 11:46:55,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:55,690 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2019-12-18 11:46:55,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 11:46:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2019-12-18 11:46:55,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-18 11:46:55,691 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:55,691 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:55,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:55,898 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:55,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:55,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1006092315, now seen corresponding path program 15 times [2019-12-18 11:46:55,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:55,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796419036] [2019-12-18 11:46:55,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:56,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796419036] [2019-12-18 11:46:56,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472061798] [2019-12-18 11:46:56,023 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:56,079 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-18 11:46:56,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:56,081 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 11:46:56,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:56,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:56,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-18 11:46:56,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560601617] [2019-12-18 11:46:56,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 11:46:56,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:56,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 11:46:56,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:46:56,110 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand 13 states. [2019-12-18 11:46:56,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:56,280 INFO L93 Difference]: Finished difference Result 44 states and 90 transitions. [2019-12-18 11:46:56,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:46:56,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-18 11:46:56,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:56,281 INFO L225 Difference]: With dead ends: 44 [2019-12-18 11:46:56,282 INFO L226 Difference]: Without dead ends: 41 [2019-12-18 11:46:56,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:46:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-18 11:46:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2019-12-18 11:46:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-18 11:46:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-18 11:46:56,286 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 16 [2019-12-18 11:46:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:56,286 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-18 11:46:56,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 11:46:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-18 11:46:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-18 11:46:56,287 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:56,287 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:56,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:56,490 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:56,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:56,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1773777041, now seen corresponding path program 16 times [2019-12-18 11:46:56,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:56,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31499391] [2019-12-18 11:46:56,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:56,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31499391] [2019-12-18 11:46:56,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671688762] [2019-12-18 11:46:56,595 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:56,649 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 11:46:56,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:56,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 11:46:56,651 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:56,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:56,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-18 11:46:56,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947424023] [2019-12-18 11:46:56,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 11:46:56,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:56,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 11:46:56,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-18 11:46:56,668 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 13 states. [2019-12-18 11:46:56,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:56,834 INFO L93 Difference]: Finished difference Result 45 states and 92 transitions. [2019-12-18 11:46:56,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 11:46:56,835 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-18 11:46:56,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:56,836 INFO L225 Difference]: With dead ends: 45 [2019-12-18 11:46:56,836 INFO L226 Difference]: Without dead ends: 42 [2019-12-18 11:46:56,836 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-18 11:46:56,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-18 11:46:56,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-18 11:46:56,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-18 11:46:56,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 86 transitions. [2019-12-18 11:46:56,840 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 86 transitions. Word has length 16 [2019-12-18 11:46:56,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:56,840 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 86 transitions. [2019-12-18 11:46:56,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 11:46:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 86 transitions. [2019-12-18 11:46:56,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-18 11:46:56,841 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:56,841 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:57,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:57,046 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:57,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:57,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1124090998, now seen corresponding path program 17 times [2019-12-18 11:46:57,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:57,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538715264] [2019-12-18 11:46:57,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:57,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538715264] [2019-12-18 11:46:57,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040803072] [2019-12-18 11:46:57,150 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:57,197 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-18 11:46:57,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:57,199 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 11:46:57,200 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:57,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:57,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-18 11:46:57,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685630262] [2019-12-18 11:46:57,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:46:57,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:57,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:46:57,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:46:57,217 INFO L87 Difference]: Start difference. First operand 42 states and 86 transitions. Second operand 14 states. [2019-12-18 11:46:57,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:57,479 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-12-18 11:46:57,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:46:57,479 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-18 11:46:57,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:57,480 INFO L225 Difference]: With dead ends: 46 [2019-12-18 11:46:57,480 INFO L226 Difference]: Without dead ends: 43 [2019-12-18 11:46:57,480 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:46:57,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-18 11:46:57,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2019-12-18 11:46:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-18 11:46:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 60 transitions. [2019-12-18 11:46:57,484 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 60 transitions. Word has length 17 [2019-12-18 11:46:57,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:57,484 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 60 transitions. [2019-12-18 11:46:57,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:46:57,484 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 60 transitions. [2019-12-18 11:46:57,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-18 11:46:57,485 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:57,485 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:57,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:57,686 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:57,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:57,686 INFO L82 PathProgramCache]: Analyzing trace with hash 847486634, now seen corresponding path program 18 times [2019-12-18 11:46:57,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:57,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137644307] [2019-12-18 11:46:57,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:57,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137644307] [2019-12-18 11:46:57,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275104404] [2019-12-18 11:46:57,785 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:57,832 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 11:46:57,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:57,833 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 11:46:57,834 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:57,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 11:46:57,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-18 11:46:57,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763445672] [2019-12-18 11:46:57,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 11:46:57,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:57,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 11:46:57,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 11:46:57,858 INFO L87 Difference]: Start difference. First operand 29 states and 60 transitions. Second operand 14 states. [2019-12-18 11:46:58,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:58,104 INFO L93 Difference]: Finished difference Result 47 states and 96 transitions. [2019-12-18 11:46:58,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 11:46:58,104 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-18 11:46:58,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:58,105 INFO L225 Difference]: With dead ends: 47 [2019-12-18 11:46:58,105 INFO L226 Difference]: Without dead ends: 44 [2019-12-18 11:46:58,106 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2019-12-18 11:46:58,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-18 11:46:58,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-18 11:46:58,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-18 11:46:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-18 11:46:58,108 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 17 [2019-12-18 11:46:58,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:58,108 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-18 11:46:58,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 11:46:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-18 11:46:58,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-18 11:46:58,109 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:58,109 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:58,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:58,313 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:58,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:58,314 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 19 times [2019-12-18 11:46:58,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:58,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184648055] [2019-12-18 11:46:58,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:58,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184648055] [2019-12-18 11:46:58,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797783865] [2019-12-18 11:46:58,394 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:58,447 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:46:58,448 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:58,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 11:46:58,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2019-12-18 11:46:58,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485483934] [2019-12-18 11:46:58,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:46:58,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:58,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:46:58,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-12-18 11:46:58,469 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 8 states. [2019-12-18 11:46:58,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:58,482 INFO L93 Difference]: Finished difference Result 96 states and 167 transitions. [2019-12-18 11:46:58,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:46:58,483 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-12-18 11:46:58,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:58,483 INFO L225 Difference]: With dead ends: 96 [2019-12-18 11:46:58,483 INFO L226 Difference]: Without dead ends: 30 [2019-12-18 11:46:58,484 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-12-18 11:46:58,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-18 11:46:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-18 11:46:58,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-18 11:46:58,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2019-12-18 11:46:58,486 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 18 [2019-12-18 11:46:58,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:58,486 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2019-12-18 11:46:58,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:46:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2019-12-18 11:46:58,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-18 11:46:58,487 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:46:58,487 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:46:58,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:58,691 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:46:58,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:46:58,692 INFO L82 PathProgramCache]: Analyzing trace with hash 502282183, now seen corresponding path program 20 times [2019-12-18 11:46:58,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:46:58,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42362543] [2019-12-18 11:46:58,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:46:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:46:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:58,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42362543] [2019-12-18 11:46:58,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724110284] [2019-12-18 11:46:58,810 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:58,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 11:46:58,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 11:46:58,862 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 11:46:58,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 11:46:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:46:58,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 11:46:58,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2019-12-18 11:46:58,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225836686] [2019-12-18 11:46:58,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 11:46:58,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:46:58,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 11:46:58,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:46:58,941 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 8 states. [2019-12-18 11:46:58,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:46:58,956 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2019-12-18 11:46:58,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 11:46:58,961 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-12-18 11:46:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:46:58,961 INFO L225 Difference]: With dead ends: 46 [2019-12-18 11:46:58,961 INFO L226 Difference]: Without dead ends: 0 [2019-12-18 11:46:58,962 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-18 11:46:58,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-18 11:46:58,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-18 11:46:58,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-18 11:46:58,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-18 11:46:58,963 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-12-18 11:46:58,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:46:58,963 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-18 11:46:58,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 11:46:58,963 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-18 11:46:58,963 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-18 11:46:59,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 11:46:59,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 11:46:59 BasicIcfg [2019-12-18 11:46:59,170 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 11:46:59,171 INFO L168 Benchmark]: Toolchain (without parser) took 12693.46 ms. Allocated memory was 145.8 MB in the beginning and 298.8 MB in the end (delta: 153.1 MB). Free memory was 102.0 MB in the beginning and 105.7 MB in the end (delta: -3.7 MB). Peak memory consumption was 149.4 MB. Max. memory is 7.1 GB. [2019-12-18 11:46:59,172 INFO L168 Benchmark]: CDTParser took 1.41 ms. Allocated memory is still 145.8 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-12-18 11:46:59,175 INFO L168 Benchmark]: CACSL2BoogieTranslator took 724.91 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 101.8 MB in the beginning and 160.5 MB in the end (delta: -58.7 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2019-12-18 11:46:59,175 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.81 ms. Allocated memory is still 202.9 MB. Free memory was 160.5 MB in the beginning and 158.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-18 11:46:59,176 INFO L168 Benchmark]: Boogie Preprocessor took 25.58 ms. Allocated memory is still 202.9 MB. Free memory was 158.5 MB in the beginning and 156.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-18 11:46:59,176 INFO L168 Benchmark]: RCFGBuilder took 428.30 ms. Allocated memory is still 202.9 MB. Free memory was 156.5 MB in the beginning and 136.9 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2019-12-18 11:46:59,177 INFO L168 Benchmark]: TraceAbstraction took 11443.72 ms. Allocated memory was 202.9 MB in the beginning and 298.8 MB in the end (delta: 95.9 MB). Free memory was 136.9 MB in the beginning and 105.7 MB in the end (delta: 31.2 MB). Peak memory consumption was 127.1 MB. Max. memory is 7.1 GB. [2019-12-18 11:46:59,184 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.41 ms. Allocated memory is still 145.8 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 724.91 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 101.8 MB in the beginning and 160.5 MB in the end (delta: -58.7 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 63.81 ms. Allocated memory is still 202.9 MB. Free memory was 160.5 MB in the beginning and 158.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.58 ms. Allocated memory is still 202.9 MB. Free memory was 158.5 MB in the beginning and 156.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 428.30 ms. Allocated memory is still 202.9 MB. Free memory was 156.5 MB in the beginning and 136.9 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11443.72 ms. Allocated memory was 202.9 MB in the beginning and 298.8 MB in the end (delta: 95.9 MB). Free memory was 136.9 MB in the beginning and 105.7 MB in the end (delta: 31.2 MB). Peak memory consumption was 127.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 53 ProgramPointsBefore, 16 ProgramPointsAfterwards, 51 TransitionsBefore, 14 TransitionsAfterwards, 740 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 3 ChoiceCompositions, 380 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 9 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 604 CheckedPairsTotal, 41 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Result: SAFE, OverallTime: 11.3s, OverallIterations: 22, TraceHistogramMax: 6, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 274 SDtfs, 618 SDslu, 433 SDs, 0 SdLazy, 520 SolverSat, 401 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 487 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=20, 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, 22 MinimizatonAttempts, 90 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 534 NumberOfCodeBlocks, 534 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 494 ConstructedInterpolants, 0 QuantifiedInterpolants, 21188 SizeOfPredicates, 88 NumberOfNonLiveVariables, 1782 ConjunctsInSsa, 184 ConjunctsInUnsatCore, 40 InterpolantComputations, 6 PerfectInterpolantSequences, 70/380 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...