/usr/bin/java -Xmx16000000000 -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-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 13:13:00,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 13:13:00,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 13:13:00,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 13:13:00,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 13:13:00,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 13:13:00,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 13:13:00,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 13:13:00,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 13:13:00,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 13:13:00,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 13:13:00,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 13:13:00,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 13:13:00,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 13:13:00,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 13:13:00,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 13:13:00,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 13:13:00,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 13:13:00,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 13:13:00,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 13:13:00,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 13:13:00,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 13:13:00,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 13:13:00,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 13:13:00,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-11 13:13:00,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-11 13:13:00,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-11 13:13:00,359 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-11 13:13:00,360 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-11 13:13:00,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-11 13:13:00,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 13:13:00,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 13:13:00,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 13:13:00,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 13:13:00,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 13:13:00,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 13:13:00,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 13:13:00,366 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 13:13:00,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 13:13:00,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 13:13:00,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 13:13:00,369 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 [2020-10-11 13:13:00,409 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 13:13:00,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 13:13:00,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 13:13:00,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 13:13:00,412 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 13:13:00,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 13:13:00,412 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 13:13:00,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 13:13:00,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 13:13:00,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 13:13:00,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 13:13:00,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 13:13:00,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 13:13:00,415 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 13:13:00,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 13:13:00,415 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 13:13:00,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 13:13:00,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 13:13:00,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 13:13:00,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 13:13:00,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 13:13:00,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 13:13:00,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 13:13:00,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 13:13:00,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 13:13:00,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 13:13:00,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 13:13:00,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-11 13:13:00,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-11 13:13:00,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 13:13:00,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 13:13:00,701 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 13:13:00,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 13:13:00,706 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 13:13:00,707 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 13:13:00,708 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-11 13:13:00,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0d0029c0/24ea33a165254e9182c5b5cc9e8c6fdc/FLAG16a141bc8 [2020-10-11 13:13:01,282 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 13:13:01,283 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-11 13:13:01,297 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0d0029c0/24ea33a165254e9182c5b5cc9e8c6fdc/FLAG16a141bc8 [2020-10-11 13:13:01,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0d0029c0/24ea33a165254e9182c5b5cc9e8c6fdc [2020-10-11 13:13:01,649 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 13:13:01,651 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 13:13:01,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 13:13:01,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 13:13:01,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 13:13:01,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:13:01" (1/1) ... [2020-10-11 13:13:01,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489b8137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:01, skipping insertion in model container [2020-10-11 13:13:01,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:13:01" (1/1) ... [2020-10-11 13:13:01,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 13:13:01,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 13:13:02,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 13:13:02,209 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 13:13:02,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 13:13:02,316 INFO L208 MainTranslator]: Completed translation [2020-10-11 13:13:02,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:02 WrapperNode [2020-10-11 13:13:02,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 13:13:02,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 13:13:02,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 13:13:02,318 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 13:13:02,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:02" (1/1) ... [2020-10-11 13:13:02,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:02" (1/1) ... [2020-10-11 13:13:02,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 13:13:02,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 13:13:02,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 13:13:02,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 13:13:02,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:02" (1/1) ... [2020-10-11 13:13:02,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:02" (1/1) ... [2020-10-11 13:13:02,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:02" (1/1) ... [2020-10-11 13:13:02,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:02" (1/1) ... [2020-10-11 13:13:02,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:02" (1/1) ... [2020-10-11 13:13:02,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:02" (1/1) ... [2020-10-11 13:13:02,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:02" (1/1) ... [2020-10-11 13:13:02,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 13:13:02,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 13:13:02,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 13:13:02,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 13:13:02,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 13:13:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-11 13:13:02,465 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-11 13:13:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-11 13:13:02,465 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-11 13:13:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 13:13:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-11 13:13:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 13:13:02,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 13:13:02,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-11 13:13:02,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 13:13:02,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 13:13:02,468 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 13:13:02,784 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 13:13:02,784 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-11 13:13:02,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:13:02 BoogieIcfgContainer [2020-10-11 13:13:02,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 13:13:02,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 13:13:02,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 13:13:02,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 13:13:02,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 01:13:01" (1/3) ... [2020-10-11 13:13:02,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7004b5b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:13:02, skipping insertion in model container [2020-10-11 13:13:02,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:02" (2/3) ... [2020-10-11 13:13:02,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7004b5b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:13:02, skipping insertion in model container [2020-10-11 13:13:02,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:13:02" (3/3) ... [2020-10-11 13:13:02,799 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-10-11 13:13:02,811 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-11 13:13:02,812 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 13:13:02,818 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 13:13:02,819 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 13:13:02,846 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,846 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,846 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,847 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,848 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,848 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,849 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,852 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,852 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,853 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,853 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,853 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,853 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,854 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,854 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,854 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,855 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,855 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,857 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,858 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,858 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,858 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,858 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,860 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,860 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,861 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,861 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,861 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,864 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,865 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,865 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,865 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,866 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,866 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,876 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,876 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,876 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,877 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,877 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,877 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:02,895 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-11 13:13:02,915 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 13:13:02,915 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-11 13:13:02,915 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 13:13:02,916 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 13:13:02,916 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 13:13:02,916 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 13:13:02,916 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 13:13:02,916 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 13:13:02,928 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-11 13:13:02,931 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-11 13:13:02,934 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-11 13:13:02,936 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-11 13:13:02,974 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-11 13:13:02,975 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 13:13:02,980 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-11 13:13:02,983 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-11 13:13:04,184 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-11 13:13:04,185 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-11 13:13:04,192 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-11 13:13:04,203 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-11 13:13:04,205 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-11 13:13:04,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-11 13:13:04,212 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:04,213 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-11 13:13:04,214 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:04,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:04,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-11 13:13:04,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:04,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879516319] [2020-10-11 13:13:04,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:04,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879516319] [2020-10-11 13:13:04,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:04,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 13:13:04,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382259199] [2020-10-11 13:13:04,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 13:13:04,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:04,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 13:13:04,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-11 13:13:04,479 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-11 13:13:04,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:04,544 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-11 13:13:04,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-11 13:13:04,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-11 13:13:04,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:04,557 INFO L225 Difference]: With dead ends: 75 [2020-10-11 13:13:04,557 INFO L226 Difference]: Without dead ends: 42 [2020-10-11 13:13:04,559 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 13:13:04,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-11 13:13:04,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-11 13:13:04,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-11 13:13:04,597 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-11 13:13:04,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:04,598 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-11 13:13:04,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 13:13:04,598 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-11 13:13:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-11 13:13:04,599 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:04,599 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:04,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 13:13:04,599 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:04,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:04,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-11 13:13:04,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:04,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031644510] [2020-10-11 13:13:04,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:04,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031644510] [2020-10-11 13:13:04,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:04,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 13:13:04,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152379837] [2020-10-11 13:13:04,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 13:13:04,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:04,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 13:13:04,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 13:13:04,677 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-11 13:13:04,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:04,707 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-11 13:13:04,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 13:13:04,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-11 13:13:04,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:04,709 INFO L225 Difference]: With dead ends: 56 [2020-10-11 13:13:04,709 INFO L226 Difference]: Without dead ends: 50 [2020-10-11 13:13:04,710 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:13:04,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-11 13:13:04,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-11 13:13:04,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:04,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-11 13:13:04,717 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-11 13:13:04,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:04,719 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-11 13:13:04,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 13:13:04,719 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-11 13:13:04,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 13:13:04,720 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:04,720 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:04,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 13:13:04,720 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:04,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:04,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-11 13:13:04,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:04,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252070682] [2020-10-11 13:13:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:04,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252070682] [2020-10-11 13:13:04,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:04,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 13:13:04,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659682873] [2020-10-11 13:13:04,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 13:13:04,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:04,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 13:13:04,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:13:04,801 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-11 13:13:04,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:04,874 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-11 13:13:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:13:04,875 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 13:13:04,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:04,876 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:13:04,877 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:04,877 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:04,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:04,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-11 13:13:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-11 13:13:04,887 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-11 13:13:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:04,887 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-11 13:13:04,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 13:13:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-11 13:13:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 13:13:04,888 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:04,889 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:04,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 13:13:04,889 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:04,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-11 13:13:04,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:04,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025092499] [2020-10-11 13:13:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:04,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025092499] [2020-10-11 13:13:04,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:04,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 13:13:04,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558737261] [2020-10-11 13:13:04,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 13:13:04,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:04,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 13:13:04,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:13:04,966 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-11 13:13:05,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:05,050 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-11 13:13:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 13:13:05,051 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 13:13:05,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:05,051 INFO L225 Difference]: With dead ends: 54 [2020-10-11 13:13:05,052 INFO L226 Difference]: Without dead ends: 43 [2020-10-11 13:13:05,052 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:05,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-11 13:13:05,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-11 13:13:05,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-11 13:13:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-11 13:13:05,057 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-11 13:13:05,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:05,057 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-11 13:13:05,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 13:13:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-11 13:13:05,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 13:13:05,058 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:05,059 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:05,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 13:13:05,059 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:05,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:05,059 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-11 13:13:05,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:05,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108679052] [2020-10-11 13:13:05,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:05,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108679052] [2020-10-11 13:13:05,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:05,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 13:13:05,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597079388] [2020-10-11 13:13:05,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 13:13:05,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:05,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 13:13:05,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:13:05,115 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-11 13:13:05,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:05,176 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-11 13:13:05,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 13:13:05,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 13:13:05,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:05,177 INFO L225 Difference]: With dead ends: 57 [2020-10-11 13:13:05,177 INFO L226 Difference]: Without dead ends: 51 [2020-10-11 13:13:05,178 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:05,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-11 13:13:05,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-11 13:13:05,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-11 13:13:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-11 13:13:05,183 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-11 13:13:05,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:05,183 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-11 13:13:05,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 13:13:05,183 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-11 13:13:05,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:05,184 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:05,184 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:05,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-11 13:13:05,185 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:05,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:05,185 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-11 13:13:05,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:05,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183304614] [2020-10-11 13:13:05,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:05,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183304614] [2020-10-11 13:13:05,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757388938] [2020-10-11 13:13:05,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:05,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:05,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:05,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:05,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:05,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:05,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:05,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 13:13:05,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382474599] [2020-10-11 13:13:05,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:05,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:05,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:05,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:05,362 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-11 13:13:05,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:05,469 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-11 13:13:05,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:13:05,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-11 13:13:05,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:05,470 INFO L225 Difference]: With dead ends: 48 [2020-10-11 13:13:05,470 INFO L226 Difference]: Without dead ends: 43 [2020-10-11 13:13:05,471 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:05,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-11 13:13:05,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-11 13:13:05,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-11 13:13:05,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-11 13:13:05,475 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-11 13:13:05,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:05,476 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-11 13:13:05,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:05,476 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-11 13:13:05,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:05,477 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:05,477 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:05,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-11 13:13:05,678 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:05,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:05,678 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-11 13:13:05,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:05,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906428395] [2020-10-11 13:13:05,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:05,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906428395] [2020-10-11 13:13:05,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918668370] [2020-10-11 13:13:05,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:05,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:05,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:05,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:05,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:05,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:05,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-11 13:13:05,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807518768] [2020-10-11 13:13:05,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 13:13:05,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:05,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 13:13:05,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-11 13:13:05,818 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-11 13:13:05,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:05,882 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-11 13:13:05,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:13:05,882 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-11 13:13:05,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:05,883 INFO L225 Difference]: With dead ends: 54 [2020-10-11 13:13:05,883 INFO L226 Difference]: Without dead ends: 48 [2020-10-11 13:13:05,883 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:05,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-11 13:13:05,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-11 13:13:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:05,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-11 13:13:05,888 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-11 13:13:05,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:05,889 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-11 13:13:05,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 13:13:05,889 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-11 13:13:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:05,890 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:05,890 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:06,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:06,100 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:06,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:06,101 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-11 13:13:06,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:06,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126244758] [2020-10-11 13:13:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:06,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126244758] [2020-10-11 13:13:06,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144466305] [2020-10-11 13:13:06,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:06,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 13:13:06,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:06,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:06,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:06,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:06,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:06,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 13:13:06,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495053430] [2020-10-11 13:13:06,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:06,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:06,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:06,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:06,292 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-11 13:13:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:06,403 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-11 13:13:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 13:13:06,404 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-11 13:13:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:06,404 INFO L225 Difference]: With dead ends: 58 [2020-10-11 13:13:06,405 INFO L226 Difference]: Without dead ends: 52 [2020-10-11 13:13:06,405 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:06,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-11 13:13:06,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-11 13:13:06,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-11 13:13:06,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-11 13:13:06,410 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-11 13:13:06,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:06,410 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-11 13:13:06,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:06,410 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-11 13:13:06,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:06,411 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:06,411 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:06,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:06,614 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:06,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:06,615 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-11 13:13:06,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:06,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623361696] [2020-10-11 13:13:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:06,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623361696] [2020-10-11 13:13:06,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470150488] [2020-10-11 13:13:06,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:06,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:06,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:06,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:06,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-11 13:13:06,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529437135] [2020-10-11 13:13:06,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 13:13:06,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:06,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 13:13:06,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-11 13:13:06,737 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-11 13:13:06,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:06,888 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-11 13:13:06,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:06,889 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-11 13:13:06,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:06,891 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:13:06,891 INFO L226 Difference]: Without dead ends: 72 [2020-10-11 13:13:06,891 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:06,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-11 13:13:06,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-11 13:13:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-11 13:13:06,904 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-11 13:13:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:06,904 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-11 13:13:06,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 13:13:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-11 13:13:06,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:06,905 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:06,905 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:07,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:07,106 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:07,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:07,106 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-11 13:13:07,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:07,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141249742] [2020-10-11 13:13:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:07,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141249742] [2020-10-11 13:13:07,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327685609] [2020-10-11 13:13:07,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:07,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:07,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:07,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:07,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:07,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:07,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:07,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 13:13:07,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238405282] [2020-10-11 13:13:07,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:07,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:07,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:07,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:07,240 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-11 13:13:07,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:07,405 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-11 13:13:07,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 13:13:07,406 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-11 13:13:07,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:07,407 INFO L225 Difference]: With dead ends: 62 [2020-10-11 13:13:07,407 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 13:13:07,408 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 13:13:07,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-11 13:13:07,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-11 13:13:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-11 13:13:07,416 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-11 13:13:07,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:07,416 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-11 13:13:07,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-11 13:13:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:07,417 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:07,417 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:07,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-11 13:13:07,618 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:07,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:07,619 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-11 13:13:07,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:07,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648834721] [2020-10-11 13:13:07,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:07,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648834721] [2020-10-11 13:13:07,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121080923] [2020-10-11 13:13:07,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:07,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 13:13:07,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:07,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:07,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:07,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:07,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-11 13:13:07,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457064910] [2020-10-11 13:13:07,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:07,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:07,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:07,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:07,769 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-11 13:13:07,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:07,859 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-11 13:13:07,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 13:13:07,859 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-11 13:13:07,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:07,860 INFO L225 Difference]: With dead ends: 64 [2020-10-11 13:13:07,860 INFO L226 Difference]: Without dead ends: 58 [2020-10-11 13:13:07,861 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:07,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-11 13:13:07,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-11 13:13:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-11 13:13:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-11 13:13:07,865 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-11 13:13:07,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:07,865 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-11 13:13:07,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:07,865 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-11 13:13:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:07,866 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:07,866 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:08,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:08,077 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:08,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:08,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-11 13:13:08,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:08,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911135228] [2020-10-11 13:13:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:08,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911135228] [2020-10-11 13:13:08,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731536751] [2020-10-11 13:13:08,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:08,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:08,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:08,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:08,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:08,235 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:08,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:08,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 13:13:08,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813666554] [2020-10-11 13:13:08,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:08,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:08,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:08,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:08,248 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-11 13:13:08,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:08,403 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-11 13:13:08,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 13:13:08,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-11 13:13:08,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:08,404 INFO L225 Difference]: With dead ends: 61 [2020-10-11 13:13:08,405 INFO L226 Difference]: Without dead ends: 55 [2020-10-11 13:13:08,405 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:08,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-11 13:13:08,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-11 13:13:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-11 13:13:08,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-11 13:13:08,411 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-11 13:13:08,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:08,412 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-11 13:13:08,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:08,413 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-11 13:13:08,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:08,413 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:08,413 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:08,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:08,615 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:08,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:08,616 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-11 13:13:08,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:08,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216624556] [2020-10-11 13:13:08,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:08,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216624556] [2020-10-11 13:13:08,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077212088] [2020-10-11 13:13:08,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:08,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:08,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:08,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:08,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:08,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:08,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-11 13:13:08,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996171623] [2020-10-11 13:13:08,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:08,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:08,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:08,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:08,748 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-11 13:13:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:08,895 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-11 13:13:08,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:08,896 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-11 13:13:08,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:08,897 INFO L225 Difference]: With dead ends: 77 [2020-10-11 13:13:08,897 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:08,898 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:08,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-11 13:13:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-11 13:13:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-11 13:13:08,907 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-11 13:13:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:08,911 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-11 13:13:08,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:08,911 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-11 13:13:08,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:08,912 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:08,912 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:09,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-11 13:13:09,125 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:09,125 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-11 13:13:09,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:09,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129709667] [2020-10-11 13:13:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:09,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129709667] [2020-10-11 13:13:09,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109744486] [2020-10-11 13:13:09,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:09,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 13:13:09,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:09,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:09,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:09,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:09,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:09,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 13:13:09,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071203801] [2020-10-11 13:13:09,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:09,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:09,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:09,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:09,272 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-11 13:13:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:09,482 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-11 13:13:09,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:09,485 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-11 13:13:09,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:09,486 INFO L225 Difference]: With dead ends: 58 [2020-10-11 13:13:09,486 INFO L226 Difference]: Without dead ends: 50 [2020-10-11 13:13:09,487 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:13:09,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-11 13:13:09,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-11 13:13:09,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-11 13:13:09,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-11 13:13:09,490 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-11 13:13:09,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:09,490 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-11 13:13:09,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:09,490 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-11 13:13:09,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:09,491 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:09,491 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:09,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:09,695 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:09,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:09,695 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-11 13:13:09,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:09,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227243790] [2020-10-11 13:13:09,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:09,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227243790] [2020-10-11 13:13:09,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182510168] [2020-10-11 13:13:09,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:09,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:09,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:09,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:09,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:09,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 13:13:09,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134850303] [2020-10-11 13:13:09,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:09,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:09,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:09,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:09,859 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-11 13:13:10,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:10,031 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-11 13:13:10,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:10,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-11 13:13:10,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:10,032 INFO L225 Difference]: With dead ends: 60 [2020-10-11 13:13:10,032 INFO L226 Difference]: Without dead ends: 55 [2020-10-11 13:13:10,033 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:13:10,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-11 13:13:10,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-11 13:13:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-11 13:13:10,037 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-11 13:13:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:10,038 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-11 13:13:10,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:10,038 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-11 13:13:10,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:10,039 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:10,039 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:10,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-11 13:13:10,247 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:10,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:10,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-11 13:13:10,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:10,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190509440] [2020-10-11 13:13:10,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:10,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190509440] [2020-10-11 13:13:10,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738854722] [2020-10-11 13:13:10,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:10,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:10,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:10,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:10,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:10,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:10,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:10,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:10,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053924879] [2020-10-11 13:13:10,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:10,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:10,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:10,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:10,382 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-11 13:13:10,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:10,574 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-11 13:13:10,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:10,575 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:10,576 INFO L225 Difference]: With dead ends: 54 [2020-10-11 13:13:10,576 INFO L226 Difference]: Without dead ends: 49 [2020-10-11 13:13:10,577 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:13:10,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-11 13:13:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-11 13:13:10,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-11 13:13:10,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-11 13:13:10,580 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-11 13:13:10,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:10,581 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-11 13:13:10,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:10,581 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-11 13:13:10,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:10,581 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:10,582 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:10,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-11 13:13:10,792 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:10,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:10,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-11 13:13:10,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:10,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539709079] [2020-10-11 13:13:10,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:10,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539709079] [2020-10-11 13:13:10,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270041624] [2020-10-11 13:13:10,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:10,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 13:13:10,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:10,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:10,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:10,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:10,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-11 13:13:10,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679288847] [2020-10-11 13:13:10,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:10,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:10,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:10,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:10,922 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-11 13:13:11,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:11,012 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-11 13:13:11,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 13:13:11,014 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-11 13:13:11,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:11,014 INFO L225 Difference]: With dead ends: 60 [2020-10-11 13:13:11,014 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 13:13:11,015 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:11,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 13:13:11,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-11 13:13:11,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-11 13:13:11,019 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-11 13:13:11,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:11,019 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-11 13:13:11,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:11,020 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-11 13:13:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:11,020 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:11,020 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:11,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-11 13:13:11,229 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:11,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:11,230 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-11 13:13:11,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:11,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076368703] [2020-10-11 13:13:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:11,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076368703] [2020-10-11 13:13:11,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288106808] [2020-10-11 13:13:11,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:11,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:11,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:11,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:11,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:11,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:11,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:11,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:11,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200105613] [2020-10-11 13:13:11,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:11,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:11,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:11,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:11,387 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-11 13:13:11,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:11,513 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-11 13:13:11,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 13:13:11,514 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:11,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:11,515 INFO L225 Difference]: With dead ends: 66 [2020-10-11 13:13:11,515 INFO L226 Difference]: Without dead ends: 60 [2020-10-11 13:13:11,516 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:11,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-11 13:13:11,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-11 13:13:11,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-11 13:13:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-11 13:13:11,519 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-11 13:13:11,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:11,519 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-11 13:13:11,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:11,519 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-11 13:13:11,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:11,520 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:11,520 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:11,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 13:13:11,731 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:11,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:11,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-11 13:13:11,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:11,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302859493] [2020-10-11 13:13:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:11,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302859493] [2020-10-11 13:13:11,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313029363] [2020-10-11 13:13:11,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:11,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 13:13:11,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:11,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:11,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:11,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:11,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-11 13:13:11,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219964986] [2020-10-11 13:13:11,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:11,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:11,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:11,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:11,851 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-11 13:13:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:12,013 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-11 13:13:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:12,013 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-11 13:13:12,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:12,015 INFO L225 Difference]: With dead ends: 67 [2020-10-11 13:13:12,015 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:12,015 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:13:12,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:12,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-11 13:13:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-11 13:13:12,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-11 13:13:12,019 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-11 13:13:12,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:12,019 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-11 13:13:12,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:12,019 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-11 13:13:12,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:12,020 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:12,020 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:12,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:12,229 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:12,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:12,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-11 13:13:12,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:12,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382426802] [2020-10-11 13:13:12,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:12,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382426802] [2020-10-11 13:13:12,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701855595] [2020-10-11 13:13:12,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:12,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 13:13:12,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:12,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:12,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:12,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:12,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:12,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:12,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528967845] [2020-10-11 13:13:12,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:12,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:12,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:12,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:12,424 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-11 13:13:12,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:12,618 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-11 13:13:12,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:12,624 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:12,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:12,625 INFO L225 Difference]: With dead ends: 69 [2020-10-11 13:13:12,625 INFO L226 Difference]: Without dead ends: 63 [2020-10-11 13:13:12,625 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:13:12,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-11 13:13:12,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-11 13:13:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-11 13:13:12,628 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-11 13:13:12,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:12,629 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-11 13:13:12,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-11 13:13:12,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:12,629 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:12,629 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:12,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:12,838 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:12,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:12,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-11 13:13:12,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:12,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455522943] [2020-10-11 13:13:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:12,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455522943] [2020-10-11 13:13:12,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434057456] [2020-10-11 13:13:12,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:12,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:12,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:12,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:12,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-11 13:13:12,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579780071] [2020-10-11 13:13:12,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:12,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:12,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:12,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:12,949 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-11 13:13:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:13,140 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-11 13:13:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:13,141 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-11 13:13:13,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:13,142 INFO L225 Difference]: With dead ends: 88 [2020-10-11 13:13:13,142 INFO L226 Difference]: Without dead ends: 82 [2020-10-11 13:13:13,142 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:13:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-11 13:13:13,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-11 13:13:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:13,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-11 13:13:13,146 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-11 13:13:13,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:13,147 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-11 13:13:13,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:13,147 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-11 13:13:13,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:13,147 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:13,148 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:13,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:13,348 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:13,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:13,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-11 13:13:13,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:13,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782018565] [2020-10-11 13:13:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:13,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782018565] [2020-10-11 13:13:13,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310948972] [2020-10-11 13:13:13,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:13,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:13,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:13,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:13,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:13,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:13,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:13,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:13,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223365886] [2020-10-11 13:13:13,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:13,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:13,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:13,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:13,514 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-11 13:13:13,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:13,765 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-11 13:13:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:13,766 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:13,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:13,767 INFO L225 Difference]: With dead ends: 69 [2020-10-11 13:13:13,767 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:13,767 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:13,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-11 13:13:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-11 13:13:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-11 13:13:13,770 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-11 13:13:13,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:13,770 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-11 13:13:13,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:13,770 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-11 13:13:13,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:13,771 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:13,771 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:13,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-11 13:13:13,979 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:13,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:13,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-11 13:13:13,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:13,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16458332] [2020-10-11 13:13:13,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:14,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16458332] [2020-10-11 13:13:14,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203788778] [2020-10-11 13:13:14,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:14,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 13:13:14,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:14,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:14,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:14,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:14,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-11 13:13:14,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023276245] [2020-10-11 13:13:14,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:14,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:14,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:14,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:14,112 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-11 13:13:14,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:14,248 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-11 13:13:14,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:14,249 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-11 13:13:14,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:14,249 INFO L225 Difference]: With dead ends: 74 [2020-10-11 13:13:14,249 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:13:14,250 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:13:14,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:13:14,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-11 13:13:14,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 13:13:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-11 13:13:14,253 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-11 13:13:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:14,253 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-11 13:13:14,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-11 13:13:14,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:14,254 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:14,254 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:14,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-11 13:13:14,455 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:14,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:14,455 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-11 13:13:14,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:14,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789322753] [2020-10-11 13:13:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:14,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789322753] [2020-10-11 13:13:14,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957683866] [2020-10-11 13:13:14,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:14,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:14,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:14,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:14,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:14,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:14,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:14,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:14,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600337670] [2020-10-11 13:13:14,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:14,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:14,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:14,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:14,612 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-11 13:13:14,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:14,800 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-11 13:13:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:14,800 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:14,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:14,801 INFO L225 Difference]: With dead ends: 71 [2020-10-11 13:13:14,801 INFO L226 Difference]: Without dead ends: 65 [2020-10-11 13:13:14,802 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:13:14,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-11 13:13:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-11 13:13:14,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:14,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-11 13:13:14,804 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-11 13:13:14,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:14,805 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-11 13:13:14,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:14,805 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-11 13:13:14,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:14,805 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:14,806 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:15,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-11 13:13:15,014 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:15,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:15,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-11 13:13:15,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:15,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939753513] [2020-10-11 13:13:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:15,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939753513] [2020-10-11 13:13:15,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543965184] [2020-10-11 13:13:15,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:15,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 13:13:15,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:15,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:15,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:15,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:15,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-11 13:13:15,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776485277] [2020-10-11 13:13:15,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:15,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:15,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:15,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:15,145 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-11 13:13:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:15,305 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-11 13:13:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:15,305 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-11 13:13:15,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:15,306 INFO L225 Difference]: With dead ends: 68 [2020-10-11 13:13:15,306 INFO L226 Difference]: Without dead ends: 62 [2020-10-11 13:13:15,307 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:13:15,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-11 13:13:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-11 13:13:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 13:13:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-11 13:13:15,310 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-11 13:13:15,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:15,311 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-11 13:13:15,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:15,311 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-11 13:13:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:15,312 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:15,312 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:15,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-11 13:13:15,512 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:15,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-11 13:13:15,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:15,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137506669] [2020-10-11 13:13:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:15,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137506669] [2020-10-11 13:13:15,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477909902] [2020-10-11 13:13:15,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:15,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 13:13:15,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:15,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:15,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:15,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:15,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:15,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:15,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230710509] [2020-10-11 13:13:15,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:15,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:15,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:15,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:15,736 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-11 13:13:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:16,000 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-11 13:13:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:16,000 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:16,001 INFO L225 Difference]: With dead ends: 67 [2020-10-11 13:13:16,001 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:16,002 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:13:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:16,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-11 13:13:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-11 13:13:16,004 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-11 13:13:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:16,004 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-11 13:13:16,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-11 13:13:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:16,005 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:16,005 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:16,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-11 13:13:16,214 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:16,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:16,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-11 13:13:16,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:16,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514916139] [2020-10-11 13:13:16,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:16,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514916139] [2020-10-11 13:13:16,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112787560] [2020-10-11 13:13:16,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:16,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:16,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:16,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:16,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-11 13:13:16,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749520371] [2020-10-11 13:13:16,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:16,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:16,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:16,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:16,336 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-11 13:13:16,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:16,540 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-11 13:13:16,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:16,541 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-11 13:13:16,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:16,542 INFO L225 Difference]: With dead ends: 83 [2020-10-11 13:13:16,542 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:13:16,543 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:16,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:13:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-11 13:13:16,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:13:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-11 13:13:16,546 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-11 13:13:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:16,547 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-11 13:13:16,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:16,547 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-11 13:13:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:16,547 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:16,547 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:16,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:16,753 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:16,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:16,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-11 13:13:16,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:16,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42846958] [2020-10-11 13:13:16,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:16,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42846958] [2020-10-11 13:13:16,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051039594] [2020-10-11 13:13:16,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:16,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:16,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:16,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:16,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:16,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:16,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:16,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315779304] [2020-10-11 13:13:16,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:16,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:16,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:16,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:16,917 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-11 13:13:17,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:17,161 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-11 13:13:17,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:17,162 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:17,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:17,163 INFO L225 Difference]: With dead ends: 62 [2020-10-11 13:13:17,163 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 13:13:17,163 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:13:17,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 13:13:17,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-11 13:13:17,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-11 13:13:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-11 13:13:17,166 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-11 13:13:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:17,166 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-11 13:13:17,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:17,167 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-11 13:13:17,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:17,167 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:17,167 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:17,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-11 13:13:17,371 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:17,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:17,371 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-11 13:13:17,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:17,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275716116] [2020-10-11 13:13:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:17,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275716116] [2020-10-11 13:13:17,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141383770] [2020-10-11 13:13:17,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:17,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 13:13:17,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:17,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:17,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:17,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:17,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:17,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:17,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857260802] [2020-10-11 13:13:17,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:17,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:17,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:17,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:17,520 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-11 13:13:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:17,774 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-11 13:13:17,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:17,774 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:17,775 INFO L225 Difference]: With dead ends: 68 [2020-10-11 13:13:17,775 INFO L226 Difference]: Without dead ends: 63 [2020-10-11 13:13:17,776 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:17,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-11 13:13:17,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-11 13:13:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:17,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-11 13:13:17,779 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-11 13:13:17,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:17,780 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-11 13:13:17,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:17,780 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-11 13:13:17,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:17,780 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:17,781 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:17,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-11 13:13:17,992 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:17,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:17,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-11 13:13:17,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:17,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776834355] [2020-10-11 13:13:17,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:18,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776834355] [2020-10-11 13:13:18,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334277724] [2020-10-11 13:13:18,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:18,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:18,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:18,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:18,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:18,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:18,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:18,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:18,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660203917] [2020-10-11 13:13:18,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:18,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:18,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:18,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:18,178 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-11 13:13:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:18,475 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-11 13:13:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:18,476 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:18,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:18,477 INFO L225 Difference]: With dead ends: 60 [2020-10-11 13:13:18,477 INFO L226 Difference]: Without dead ends: 55 [2020-10-11 13:13:18,477 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-11 13:13:18,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-11 13:13:18,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-11 13:13:18,480 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-11 13:13:18,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:18,480 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-11 13:13:18,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:18,480 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-11 13:13:18,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:18,481 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:18,481 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:18,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:18,682 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:18,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:18,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-11 13:13:18,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:18,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394312940] [2020-10-11 13:13:18,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:18,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394312940] [2020-10-11 13:13:18,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654028828] [2020-10-11 13:13:18,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:18,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 13:13:18,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:18,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:18,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:18,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:18,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:18,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508372293] [2020-10-11 13:13:18,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:18,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:18,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:18,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:18,820 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-11 13:13:18,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:18,964 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-11 13:13:18,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:18,965 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:18,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:18,966 INFO L225 Difference]: With dead ends: 66 [2020-10-11 13:13:18,966 INFO L226 Difference]: Without dead ends: 60 [2020-10-11 13:13:18,966 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:13:18,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-11 13:13:18,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-11 13:13:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:18,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-11 13:13:18,969 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-11 13:13:18,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:18,970 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-11 13:13:18,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:18,970 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-11 13:13:18,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:18,970 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:18,971 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:19,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:19,174 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:19,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:19,174 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-11 13:13:19,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:19,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428197498] [2020-10-11 13:13:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:19,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428197498] [2020-10-11 13:13:19,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061801070] [2020-10-11 13:13:19,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:19,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 13:13:19,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:19,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:19,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:19,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:19,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:19,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:19,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318085353] [2020-10-11 13:13:19,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:19,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:19,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:19,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:19,328 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-11 13:13:19,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:19,512 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-11 13:13:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:19,513 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:19,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:19,513 INFO L225 Difference]: With dead ends: 74 [2020-10-11 13:13:19,513 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:13:19,514 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:13:19,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:13:19,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-11 13:13:19,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-11 13:13:19,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-11 13:13:19,516 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-11 13:13:19,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:19,517 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-11 13:13:19,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:19,517 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-11 13:13:19,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:19,517 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:19,517 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:19,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-11 13:13:19,725 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:19,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:19,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-11 13:13:19,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:19,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366816575] [2020-10-11 13:13:19,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:19,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366816575] [2020-10-11 13:13:19,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344471999] [2020-10-11 13:13:19,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:19,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:19,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:19,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:19,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:19,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308745146] [2020-10-11 13:13:19,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:19,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:19,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:19,859 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-11 13:13:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:20,070 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-11 13:13:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:20,071 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:20,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:20,072 INFO L225 Difference]: With dead ends: 75 [2020-10-11 13:13:20,072 INFO L226 Difference]: Without dead ends: 69 [2020-10-11 13:13:20,073 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:20,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-11 13:13:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-11 13:13:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 13:13:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-11 13:13:20,076 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-11 13:13:20,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:20,076 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-11 13:13:20,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:20,076 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-11 13:13:20,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:20,077 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:20,077 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:20,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:20,287 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:20,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:20,287 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-11 13:13:20,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:20,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074297538] [2020-10-11 13:13:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:20,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074297538] [2020-10-11 13:13:20,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388548109] [2020-10-11 13:13:20,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:20,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:20,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:20,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:20,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:20,441 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:20,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:20,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:20,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088859217] [2020-10-11 13:13:20,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:20,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:20,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:20,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:20,454 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-11 13:13:20,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:20,690 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-11 13:13:20,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:20,691 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:20,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:20,692 INFO L225 Difference]: With dead ends: 79 [2020-10-11 13:13:20,692 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:13:20,692 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:13:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:13:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-11 13:13:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-11 13:13:20,695 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-11 13:13:20,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:20,695 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-11 13:13:20,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-11 13:13:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:20,695 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:20,696 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:20,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-11 13:13:20,896 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:20,897 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-11 13:13:20,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:20,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589527954] [2020-10-11 13:13:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:20,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589527954] [2020-10-11 13:13:20,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988192522] [2020-10-11 13:13:20,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:21,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 13:13:21,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:21,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:21,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:21,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:21,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:21,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515732832] [2020-10-11 13:13:21,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:21,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:21,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:21,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:21,028 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-11 13:13:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:21,271 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-11 13:13:21,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:21,271 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:21,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:21,272 INFO L225 Difference]: With dead ends: 79 [2020-10-11 13:13:21,272 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:13:21,273 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:21,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:13:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-11 13:13:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-11 13:13:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-11 13:13:21,275 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-11 13:13:21,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:21,276 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-11 13:13:21,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-11 13:13:21,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:21,276 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:21,276 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:21,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:21,477 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:21,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:21,478 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-11 13:13:21,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:21,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914060987] [2020-10-11 13:13:21,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:21,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914060987] [2020-10-11 13:13:21,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887990753] [2020-10-11 13:13:21,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:21,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:21,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:21,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:21,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:21,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:21,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:21,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:21,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949189549] [2020-10-11 13:13:21,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:21,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:21,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:21,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:21,629 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-11 13:13:21,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:21,912 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-11 13:13:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:21,913 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:21,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:21,914 INFO L225 Difference]: With dead ends: 76 [2020-10-11 13:13:21,914 INFO L226 Difference]: Without dead ends: 70 [2020-10-11 13:13:21,914 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:21,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-11 13:13:21,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-11 13:13:21,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-11 13:13:21,917 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-11 13:13:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:21,917 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-11 13:13:21,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-11 13:13:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:21,917 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:21,918 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:22,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-11 13:13:22,118 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:22,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:22,119 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-11 13:13:22,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:22,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792521712] [2020-10-11 13:13:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:22,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792521712] [2020-10-11 13:13:22,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365125694] [2020-10-11 13:13:22,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:22,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 13:13:22,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:22,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:22,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:22,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:22,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:22,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412062136] [2020-10-11 13:13:22,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:22,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:22,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:22,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:22,249 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-11 13:13:22,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:22,585 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-11 13:13:22,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:22,586 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:22,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:22,587 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:13:22,587 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 13:13:22,588 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:13:22,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 13:13:22,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-11 13:13:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:13:22,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-11 13:13:22,592 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-11 13:13:22,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:22,593 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-11 13:13:22,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:22,593 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-11 13:13:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:22,594 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:22,594 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:22,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-11 13:13:22,795 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:22,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:22,795 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-11 13:13:22,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:22,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677832712] [2020-10-11 13:13:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:22,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677832712] [2020-10-11 13:13:22,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183464479] [2020-10-11 13:13:22,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:23,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 13:13:23,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:23,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:23,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:23,056 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:23,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:23,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:23,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349631446] [2020-10-11 13:13:23,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:23,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:23,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:23,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:23,072 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-11 13:13:23,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:23,513 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-11 13:13:23,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:23,514 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:23,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:23,515 INFO L225 Difference]: With dead ends: 77 [2020-10-11 13:13:23,515 INFO L226 Difference]: Without dead ends: 69 [2020-10-11 13:13:23,516 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:13:23,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-11 13:13:23,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-11 13:13:23,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-11 13:13:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-11 13:13:23,519 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-11 13:13:23,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:23,520 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-11 13:13:23,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:23,520 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-11 13:13:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:23,522 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:23,522 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:23,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-11 13:13:23,723 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:23,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:23,723 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-11 13:13:23,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:23,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007278947] [2020-10-11 13:13:23,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:23,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007278947] [2020-10-11 13:13:23,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380994253] [2020-10-11 13:13:23,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:23,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:23,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:23,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:23,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:13:23,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564065317] [2020-10-11 13:13:23,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:23,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:23,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:23,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:23,873 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-11 13:13:24,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:24,050 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-11 13:13:24,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:24,050 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:13:24,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:24,051 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:13:24,052 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:13:24,052 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:13:24,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-11 13:13:24,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:13:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:13:24,056 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-11 13:13:24,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:24,056 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:13:24,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:13:24,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:24,063 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:24,063 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:24,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-11 13:13:24,267 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:24,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:24,268 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-11 13:13:24,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:24,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049522134] [2020-10-11 13:13:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:24,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049522134] [2020-10-11 13:13:24,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125770692] [2020-10-11 13:13:24,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:24,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:24,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:24,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:24,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:24,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:24,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:24,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:24,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933256903] [2020-10-11 13:13:24,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:24,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:24,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:24,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:24,430 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-11 13:13:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:24,670 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-11 13:13:24,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:24,670 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:24,671 INFO L225 Difference]: With dead ends: 81 [2020-10-11 13:13:24,671 INFO L226 Difference]: Without dead ends: 75 [2020-10-11 13:13:24,671 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:24,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-11 13:13:24,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-11 13:13:24,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:13:24,674 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-11 13:13:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:24,674 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:13:24,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:24,674 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:13:24,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:24,675 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:24,675 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:24,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-11 13:13:24,883 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:24,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:24,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-11 13:13:24,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:24,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675860376] [2020-10-11 13:13:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:24,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675860376] [2020-10-11 13:13:24,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064620568] [2020-10-11 13:13:24,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:25,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 13:13:25,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:25,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:25,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:25,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:25,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:13:25,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016266143] [2020-10-11 13:13:25,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:25,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:25,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:25,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:25,028 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-11 13:13:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:25,246 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-11 13:13:25,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:25,246 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:13:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:25,248 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:13:25,248 INFO L226 Difference]: Without dead ends: 72 [2020-10-11 13:13:25,248 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:13:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-11 13:13:25,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-11 13:13:25,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:13:25,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:13:25,251 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-11 13:13:25,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:25,251 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:13:25,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:25,251 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:13:25,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:25,252 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:25,252 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:25,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-11 13:13:25,461 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:25,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:25,461 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-11 13:13:25,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:25,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060336862] [2020-10-11 13:13:25,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:25,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060336862] [2020-10-11 13:13:25,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131379073] [2020-10-11 13:13:25,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:25,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:25,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:25,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:25,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:25,658 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:25,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:25,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:25,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365071256] [2020-10-11 13:13:25,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:25,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:25,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:25,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:25,671 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-11 13:13:25,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:25,994 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-11 13:13:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:25,995 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:25,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:25,997 INFO L225 Difference]: With dead ends: 77 [2020-10-11 13:13:25,997 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:25,997 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:13:25,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:25,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-11 13:13:25,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:26,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:13:26,000 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-11 13:13:26,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:26,000 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:13:26,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:26,000 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:13:26,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:26,001 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:26,001 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:26,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-11 13:13:26,202 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:26,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:26,202 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-11 13:13:26,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:26,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200172510] [2020-10-11 13:13:26,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:26,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200172510] [2020-10-11 13:13:26,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206979097] [2020-10-11 13:13:26,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:26,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 13:13:26,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:26,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:26,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:26,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:26,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:13:26,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290744237] [2020-10-11 13:13:26,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:26,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:26,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:26,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:26,333 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-11 13:13:26,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:26,593 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-11 13:13:26,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:26,594 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:13:26,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:26,595 INFO L225 Difference]: With dead ends: 74 [2020-10-11 13:13:26,595 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:13:26,596 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:26,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:13:26,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-11 13:13:26,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:13:26,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:13:26,598 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-11 13:13:26,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:26,598 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:13:26,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:26,599 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:13:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:26,599 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:26,599 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:26,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:26,808 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:26,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:26,809 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-11 13:13:26,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:26,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085983984] [2020-10-11 13:13:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:26,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085983984] [2020-10-11 13:13:26,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128774759] [2020-10-11 13:13:26,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:26,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 13:13:26,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:26,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:26,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:26,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:26,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:26,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:26,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057207437] [2020-10-11 13:13:26,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:26,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:26,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:26,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:26,959 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-11 13:13:27,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:27,330 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-11 13:13:27,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:27,331 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:27,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:27,332 INFO L225 Difference]: With dead ends: 73 [2020-10-11 13:13:27,332 INFO L226 Difference]: Without dead ends: 67 [2020-10-11 13:13:27,333 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:13:27,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-11 13:13:27,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-11 13:13:27,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:27,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:13:27,336 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-11 13:13:27,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:27,336 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:13:27,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:27,336 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:13:27,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:27,337 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:27,337 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:27,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-11 13:13:27,546 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:27,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:27,546 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-11 13:13:27,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:27,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186578921] [2020-10-11 13:13:27,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:27,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:27,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186578921] [2020-10-11 13:13:27,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926384303] [2020-10-11 13:13:27,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:27,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:27,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:27,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:27,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:13:27,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130068552] [2020-10-11 13:13:27,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:27,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:27,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:27,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:27,679 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-11 13:13:27,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:27,995 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-11 13:13:27,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:27,996 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:13:27,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:27,997 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:13:27,997 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:13:27,998 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:13:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:13:28,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-11 13:13:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-11 13:13:28,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-11 13:13:28,002 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-11 13:13:28,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:28,002 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-11 13:13:28,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:28,002 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-11 13:13:28,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:28,003 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:28,003 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:28,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:28,214 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:28,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:28,215 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-11 13:13:28,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:28,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252750653] [2020-10-11 13:13:28,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:28,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252750653] [2020-10-11 13:13:28,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870282524] [2020-10-11 13:13:28,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:28,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:28,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:28,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:28,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:28,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:28,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:28,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:28,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081231139] [2020-10-11 13:13:28,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:28,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:28,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:28,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:28,379 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-11 13:13:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:28,789 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-10-11 13:13:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:13:28,789 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:28,790 INFO L225 Difference]: With dead ends: 70 [2020-10-11 13:13:28,790 INFO L226 Difference]: Without dead ends: 62 [2020-10-11 13:13:28,790 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:13:28,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-11 13:13:28,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-10-11 13:13:28,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-11 13:13:28,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-11 13:13:28,793 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-11 13:13:28,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:28,793 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-11 13:13:28,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:28,793 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-11 13:13:28,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:28,794 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:28,794 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:29,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-11 13:13:29,002 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:29,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:29,003 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-11 13:13:29,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:29,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745614479] [2020-10-11 13:13:29,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:29,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745614479] [2020-10-11 13:13:29,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167185403] [2020-10-11 13:13:29,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:29,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 13:13:29,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:29,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:29,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:29,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:29,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:29,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:29,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677637279] [2020-10-11 13:13:29,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:29,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:29,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:29,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:29,162 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-11 13:13:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:29,532 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-11 13:13:29,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:29,533 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:29,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:29,533 INFO L225 Difference]: With dead ends: 76 [2020-10-11 13:13:29,533 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:29,534 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:13:29,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:29,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-11 13:13:29,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:13:29,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-11 13:13:29,536 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-11 13:13:29,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:29,536 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-11 13:13:29,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:29,537 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-11 13:13:29,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:29,537 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:29,537 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:29,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:29,745 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:29,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:29,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-11 13:13:29,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:29,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729604495] [2020-10-11 13:13:29,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:29,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729604495] [2020-10-11 13:13:29,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978390279] [2020-10-11 13:13:29,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:29,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:29,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:29,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:29,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:29,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:29,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:29,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:29,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80692491] [2020-10-11 13:13:29,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:29,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:29,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:29,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:29,914 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-11 13:13:30,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:30,287 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-11 13:13:30,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:30,288 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:30,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:30,288 INFO L225 Difference]: With dead ends: 66 [2020-10-11 13:13:30,289 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:30,289 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:13:30,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-11 13:13:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-11 13:13:30,293 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-11 13:13:30,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:30,293 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-11 13:13:30,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:30,293 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-11 13:13:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:30,294 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:30,294 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:30,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-11 13:13:30,503 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:30,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:30,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-11 13:13:30,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:30,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818371259] [2020-10-11 13:13:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:30,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818371259] [2020-10-11 13:13:30,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035658622] [2020-10-11 13:13:30,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:30,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:13:30,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:30,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:30,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:30,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:30,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:30,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090976671] [2020-10-11 13:13:30,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:30,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:30,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:30,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:30,680 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-11 13:13:30,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:30,859 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-11 13:13:30,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:30,859 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:30,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:30,860 INFO L225 Difference]: With dead ends: 72 [2020-10-11 13:13:30,860 INFO L226 Difference]: Without dead ends: 66 [2020-10-11 13:13:30,861 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:13:30,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-11 13:13:30,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-11 13:13:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:13:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-11 13:13:30,864 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-11 13:13:30,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:30,865 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-11 13:13:30,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:30,865 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-11 13:13:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:30,865 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:30,865 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:31,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-11 13:13:31,070 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:31,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:31,070 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-11 13:13:31,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:31,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807437188] [2020-10-11 13:13:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:31,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807437188] [2020-10-11 13:13:31,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563897553] [2020-10-11 13:13:31,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:31,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:13:31,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:31,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:31,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:31,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:31,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:31,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:31,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667761192] [2020-10-11 13:13:31,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:31,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:31,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:31,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:31,244 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-11 13:13:31,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:31,456 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-11 13:13:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:31,457 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:31,458 INFO L225 Difference]: With dead ends: 82 [2020-10-11 13:13:31,458 INFO L226 Difference]: Without dead ends: 76 [2020-10-11 13:13:31,458 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:31,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-11 13:13:31,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-11 13:13:31,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-11 13:13:31,461 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-11 13:13:31,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:31,461 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-11 13:13:31,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:31,461 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-11 13:13:31,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:31,462 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:31,462 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:31,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-11 13:13:31,669 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:31,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:31,669 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-11 13:13:31,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:31,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683787616] [2020-10-11 13:13:31,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:31,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683787616] [2020-10-11 13:13:31,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363260616] [2020-10-11 13:13:31,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:31,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:31,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:31,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:31,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:31,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357889896] [2020-10-11 13:13:31,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:31,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:31,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:31,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:31,834 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-11 13:13:32,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:32,071 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-11 13:13:32,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:32,071 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:32,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:32,073 INFO L225 Difference]: With dead ends: 83 [2020-10-11 13:13:32,073 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:13:32,074 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:32,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:13:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-11 13:13:32,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-11 13:13:32,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-11 13:13:32,076 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-11 13:13:32,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:32,076 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-11 13:13:32,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:32,077 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-11 13:13:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:32,077 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:32,077 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:32,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-11 13:13:32,280 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:32,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:32,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-11 13:13:32,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:32,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729918886] [2020-10-11 13:13:32,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:32,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729918886] [2020-10-11 13:13:32,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471325019] [2020-10-11 13:13:32,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:32,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:32,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:32,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:32,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:32,495 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:32,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:32,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:32,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681915730] [2020-10-11 13:13:32,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:32,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:32,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:32,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:32,511 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-11 13:13:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:32,782 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-11 13:13:32,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:32,784 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:32,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:32,784 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:13:32,785 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:13:32,785 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:13:32,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:13:32,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-11 13:13:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:13:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-11 13:13:32,787 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-11 13:13:32,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:32,787 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-11 13:13:32,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:32,787 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-11 13:13:32,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:32,787 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:32,788 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:32,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:32,988 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:32,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:32,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-11 13:13:32,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:32,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228712819] [2020-10-11 13:13:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:33,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228712819] [2020-10-11 13:13:33,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671504773] [2020-10-11 13:13:33,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:33,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 13:13:33,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:33,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:33,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:33,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:33,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:33,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555996123] [2020-10-11 13:13:33,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:33,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:33,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:33,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:33,162 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-11 13:13:33,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:33,459 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-11 13:13:33,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:33,459 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:33,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:33,460 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:13:33,460 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:13:33,461 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:13:33,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:13:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-11 13:13:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:13:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:13:33,463 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-11 13:13:33,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:33,464 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:13:33,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:13:33,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:33,464 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:33,465 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:33,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:33,674 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:33,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:33,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-11 13:13:33,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:33,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421379865] [2020-10-11 13:13:33,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:33,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421379865] [2020-10-11 13:13:33,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714169782] [2020-10-11 13:13:33,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:33,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:33,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:33,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:33,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:33,835 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:33,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:33,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:33,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941836147] [2020-10-11 13:13:33,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:33,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:33,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:33,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:33,847 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-11 13:13:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:34,193 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-11 13:13:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:34,193 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:34,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:34,194 INFO L225 Difference]: With dead ends: 86 [2020-10-11 13:13:34,194 INFO L226 Difference]: Without dead ends: 80 [2020-10-11 13:13:34,195 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:13:34,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-11 13:13:34,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-11 13:13:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:34,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:13:34,197 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-11 13:13:34,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:34,197 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:13:34,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:34,197 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:13:34,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:34,198 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:34,198 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:34,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-11 13:13:34,407 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:34,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:34,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-11 13:13:34,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:34,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278452963] [2020-10-11 13:13:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:34,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278452963] [2020-10-11 13:13:34,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972218145] [2020-10-11 13:13:34,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:34,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:13:34,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:34,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:34,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:34,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:34,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:34,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206287423] [2020-10-11 13:13:34,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:34,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:34,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:34,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:34,553 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-11 13:13:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:34,875 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-11 13:13:34,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:13:34,876 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:34,877 INFO L225 Difference]: With dead ends: 87 [2020-10-11 13:13:34,877 INFO L226 Difference]: Without dead ends: 81 [2020-10-11 13:13:34,877 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:13:34,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-11 13:13:34,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-11 13:13:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-11 13:13:34,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-11 13:13:34,880 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-11 13:13:34,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:34,880 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-11 13:13:34,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:34,881 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-11 13:13:34,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:34,881 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:34,881 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:35,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:35,090 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:35,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-11 13:13:35,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:35,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772390597] [2020-10-11 13:13:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:35,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772390597] [2020-10-11 13:13:35,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948486538] [2020-10-11 13:13:35,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:35,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:13:35,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:35,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:35,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:35,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:35,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:35,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:35,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515110522] [2020-10-11 13:13:35,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:35,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:35,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:35,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:35,300 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-11 13:13:35,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:35,758 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-11 13:13:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:13:35,759 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:35,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:35,760 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:13:35,760 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:13:35,760 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:13:35,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:13:35,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-11 13:13:35,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:13:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-11 13:13:35,763 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-11 13:13:35,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:35,763 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-11 13:13:35,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:35,763 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-11 13:13:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:35,764 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:35,764 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:35,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-11 13:13:35,972 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:35,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:35,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-11 13:13:35,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:35,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586099474] [2020-10-11 13:13:35,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:36,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586099474] [2020-10-11 13:13:36,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094772250] [2020-10-11 13:13:36,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:36,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:36,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:36,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:36,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:36,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238370170] [2020-10-11 13:13:36,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:36,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:36,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:36,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:36,113 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-11 13:13:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:36,496 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-11 13:13:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:13:36,497 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:36,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:36,498 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:13:36,498 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:13:36,499 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:13:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:13:36,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-11 13:13:36,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:13:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-11 13:13:36,501 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-11 13:13:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:36,502 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-11 13:13:36,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:36,502 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-11 13:13:36,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:36,502 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:36,502 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:36,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-11 13:13:36,711 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:36,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:36,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-11 13:13:36,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:36,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463092686] [2020-10-11 13:13:36,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:36,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463092686] [2020-10-11 13:13:36,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992886228] [2020-10-11 13:13:36,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:36,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:36,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:36,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:36,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:36,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:36,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:36,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:36,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440450862] [2020-10-11 13:13:36,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:36,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:36,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:36,873 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-11 13:13:37,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:37,337 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-11 13:13:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:13:37,338 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:37,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:37,339 INFO L225 Difference]: With dead ends: 85 [2020-10-11 13:13:37,339 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:13:37,339 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:13:37,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:13:37,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-11 13:13:37,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-11 13:13:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-11 13:13:37,341 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-11 13:13:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:37,342 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-11 13:13:37,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-11 13:13:37,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:37,342 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:37,342 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:37,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-11 13:13:37,546 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:37,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:37,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-11 13:13:37,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:37,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117552645] [2020-10-11 13:13:37,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:37,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117552645] [2020-10-11 13:13:37,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295406388] [2020-10-11 13:13:37,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:37,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 13:13:37,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:37,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:37,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:37,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:37,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:13:37,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598405259] [2020-10-11 13:13:37,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:37,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:37,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:37,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:37,751 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-11 13:13:37,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:37,956 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-11 13:13:37,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:37,957 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:13:37,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:37,958 INFO L225 Difference]: With dead ends: 94 [2020-10-11 13:13:37,958 INFO L226 Difference]: Without dead ends: 88 [2020-10-11 13:13:37,958 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:37,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-11 13:13:37,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-11 13:13:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:13:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:13:37,961 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-11 13:13:37,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:37,961 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:13:37,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:13:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:37,962 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:37,962 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:38,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-11 13:13:38,169 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:38,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:38,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-11 13:13:38,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:38,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622566171] [2020-10-11 13:13:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:38,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622566171] [2020-10-11 13:13:38,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693151146] [2020-10-11 13:13:38,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:38,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:38,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:38,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:38,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:38,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:38,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:38,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:13:38,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592048980] [2020-10-11 13:13:38,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:38,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:38,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:38,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:38,451 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-11 13:13:38,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:38,748 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-11 13:13:38,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:38,749 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:13:38,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:38,749 INFO L225 Difference]: With dead ends: 91 [2020-10-11 13:13:38,749 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 13:13:38,750 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:13:38,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 13:13:38,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-11 13:13:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:13:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:13:38,752 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-11 13:13:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:38,753 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:13:38,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:13:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:38,754 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:38,754 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:38,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-11 13:13:38,961 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:38,961 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-11 13:13:38,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:38,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3526841] [2020-10-11 13:13:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:39,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:39,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3526841] [2020-10-11 13:13:39,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946914047] [2020-10-11 13:13:39,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:39,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:13:39,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:39,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:39,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:39,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:13:39,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201964083] [2020-10-11 13:13:39,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:39,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:39,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:39,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:39,133 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-11 13:13:39,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:39,420 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-11 13:13:39,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:39,421 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:13:39,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:39,422 INFO L225 Difference]: With dead ends: 88 [2020-10-11 13:13:39,422 INFO L226 Difference]: Without dead ends: 82 [2020-10-11 13:13:39,423 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:13:39,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-11 13:13:39,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-11 13:13:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:13:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:13:39,425 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-11 13:13:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:39,426 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:13:39,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:39,426 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:13:39,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:39,426 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:39,426 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:39,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:39,637 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:39,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:39,637 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-11 13:13:39,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:39,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505589143] [2020-10-11 13:13:39,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:39,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505589143] [2020-10-11 13:13:39,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748398218] [2020-10-11 13:13:39,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:39,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:13:39,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:39,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:39,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:39,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:39,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:39,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:13:39,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613878441] [2020-10-11 13:13:39,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:39,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:39,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:39,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:39,819 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-11 13:13:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:40,194 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-11 13:13:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:40,195 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:13:40,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:40,196 INFO L225 Difference]: With dead ends: 87 [2020-10-11 13:13:40,196 INFO L226 Difference]: Without dead ends: 81 [2020-10-11 13:13:40,196 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:13:40,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-11 13:13:40,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-11 13:13:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:13:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:13:40,199 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-11 13:13:40,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:40,199 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:13:40,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:13:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:40,200 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:40,200 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:40,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:40,401 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:40,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:40,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-11 13:13:40,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:40,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108084417] [2020-10-11 13:13:40,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:40,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108084417] [2020-10-11 13:13:40,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154440927] [2020-10-11 13:13:40,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:40,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:40,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:40,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:40,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:13:40,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066548746] [2020-10-11 13:13:40,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:40,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:40,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:40,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:40,563 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-11 13:13:40,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:40,872 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-11 13:13:40,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:40,873 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:13:40,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:40,874 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:13:40,874 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:13:40,874 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:13:40,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:13:40,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-11 13:13:40,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:13:40,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:13:40,877 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-11 13:13:40,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:40,877 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:13:40,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:40,877 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:13:40,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:40,878 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:40,878 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:41,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-11 13:13:41,087 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:41,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:41,087 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-11 13:13:41,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:41,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283532402] [2020-10-11 13:13:41,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:41,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283532402] [2020-10-11 13:13:41,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51990171] [2020-10-11 13:13:41,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:41,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:41,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:41,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:41,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:41,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:41,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:41,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:13:41,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050640665] [2020-10-11 13:13:41,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:41,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:41,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:41,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:41,263 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-11 13:13:41,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:41,691 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-11 13:13:41,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:13:41,692 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:13:41,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:41,693 INFO L225 Difference]: With dead ends: 83 [2020-10-11 13:13:41,693 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:13:41,694 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:13:41,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:13:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-11 13:13:41,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:13:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:13:41,700 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-11 13:13:41,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:41,700 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:13:41,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:41,701 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:13:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:41,701 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:41,701 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:41,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:41,912 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:41,913 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-11 13:13:41,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:41,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592387447] [2020-10-11 13:13:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:42,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592387447] [2020-10-11 13:13:42,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429914937] [2020-10-11 13:13:42,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:42,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 13:13:42,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:42,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:42,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:42,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:42,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:13:42,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682569872] [2020-10-11 13:13:42,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:42,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:42,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:42,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:42,083 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-11 13:13:42,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:42,457 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-11 13:13:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:13:42,457 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:13:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:42,458 INFO L225 Difference]: With dead ends: 80 [2020-10-11 13:13:42,458 INFO L226 Difference]: Without dead ends: 74 [2020-10-11 13:13:42,459 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:13:42,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-11 13:13:42,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-11 13:13:42,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:13:42,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:13:42,463 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-11 13:13:42,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:42,463 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:13:42,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:42,464 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:13:42,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:42,464 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:42,464 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:42,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-11 13:13:42,675 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:42,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:42,675 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-11 13:13:42,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:42,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026062922] [2020-10-11 13:13:42,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:42,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026062922] [2020-10-11 13:13:42,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513805596] [2020-10-11 13:13:42,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:42,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:42,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:42,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:42,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:42,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:42,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:42,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:13:42,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737543551] [2020-10-11 13:13:42,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:42,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:42,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:42,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:42,860 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-11 13:13:43,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:43,373 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-11 13:13:43,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:13:43,374 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:13:43,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:43,374 INFO L225 Difference]: With dead ends: 79 [2020-10-11 13:13:43,375 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:13:43,375 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 13:13:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:13:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-11 13:13:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:13:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:13:43,377 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-11 13:13:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:43,377 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:13:43,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:43,379 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:13:43,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:43,379 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:43,379 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:43,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:43,580 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:43,581 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-11 13:13:43,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:43,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542027346] [2020-10-11 13:13:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:43,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542027346] [2020-10-11 13:13:43,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815360531] [2020-10-11 13:13:43,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:43,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:13:43,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:43,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:43,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:43,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:43,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:13:43,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455365675] [2020-10-11 13:13:43,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:43,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:43,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:43,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:43,750 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-11 13:13:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:44,161 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-11 13:13:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:13:44,162 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:13:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:44,163 INFO L225 Difference]: With dead ends: 95 [2020-10-11 13:13:44,163 INFO L226 Difference]: Without dead ends: 89 [2020-10-11 13:13:44,164 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:13:44,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-11 13:13:44,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-11 13:13:44,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 13:13:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-11 13:13:44,166 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-11 13:13:44,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:44,167 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-11 13:13:44,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:44,167 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-11 13:13:44,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:44,167 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:44,167 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:44,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-11 13:13:44,372 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:44,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:44,372 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-11 13:13:44,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:44,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387828338] [2020-10-11 13:13:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:44,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387828338] [2020-10-11 13:13:44,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572761825] [2020-10-11 13:13:44,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:44,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:13:44,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:44,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:44,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:44,532 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:44,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:44,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:13:44,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056488072] [2020-10-11 13:13:44,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:44,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:44,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:44,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:44,544 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-11 13:13:45,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:45,080 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-11 13:13:45,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:13:45,081 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:13:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:45,082 INFO L225 Difference]: With dead ends: 76 [2020-10-11 13:13:45,082 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:13:45,082 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:13:45,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:13:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-11 13:13:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-11 13:13:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-11 13:13:45,085 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-11 13:13:45,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:45,085 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-11 13:13:45,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-11 13:13:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:45,085 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:45,085 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:45,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:45,286 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:45,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:45,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-11 13:13:45,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:45,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363862186] [2020-10-11 13:13:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:45,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363862186] [2020-10-11 13:13:45,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327228227] [2020-10-11 13:13:45,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:45,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:45,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:45,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:45,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:45,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:13:45,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309350451] [2020-10-11 13:13:45,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:45,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:45,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:45,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:45,451 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-11 13:13:45,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:45,940 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-11 13:13:45,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:13:45,941 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:13:45,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:45,942 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:13:45,942 INFO L226 Difference]: Without dead ends: 79 [2020-10-11 13:13:45,942 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:13:45,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-11 13:13:45,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-11 13:13:45,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:13:45,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-11 13:13:45,944 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-11 13:13:45,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:45,945 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-11 13:13:45,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-11 13:13:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:13:45,945 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:45,945 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:46,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-11 13:13:46,146 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:46,147 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-11 13:13:46,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:46,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930924736] [2020-10-11 13:13:46,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:46,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930924736] [2020-10-11 13:13:46,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796473397] [2020-10-11 13:13:46,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:46,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:46,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:46,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:13:46,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:46,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:46,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:46,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:13:46,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084439421] [2020-10-11 13:13:46,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:13:46,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:46,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:13:46,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:46,329 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-11 13:13:46,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:46,866 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-11 13:13:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:13:46,867 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:13:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:46,867 INFO L225 Difference]: With dead ends: 72 [2020-10-11 13:13:46,868 INFO L226 Difference]: Without dead ends: 67 [2020-10-11 13:13:46,868 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:13:46,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-11 13:13:46,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-11 13:13:46,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-11 13:13:46,869 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-11 13:13:46,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:46,870 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-11 13:13:46,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:13:46,870 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-11 13:13:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:13:46,870 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:46,870 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:47,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-11 13:13:47,071 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:47,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:47,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-11 13:13:47,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:47,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487551290] [2020-10-11 13:13:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:47,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487551290] [2020-10-11 13:13:47,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281013310] [2020-10-11 13:13:47,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:47,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 13:13:47,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:47,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:13:47,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:47,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:47,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:13:47,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69925048] [2020-10-11 13:13:47,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:47,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:47,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:47,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:47,300 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-11 13:13:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:47,512 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-11 13:13:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:47,512 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:13:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:47,513 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:13:47,513 INFO L226 Difference]: Without dead ends: 72 [2020-10-11 13:13:47,514 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:13:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-11 13:13:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-11 13:13:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:13:47,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-11 13:13:47,516 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-11 13:13:47,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:47,516 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-11 13:13:47,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:47,517 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-11 13:13:47,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:13:47,517 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:47,517 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:47,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:47,718 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:47,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:47,719 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-11 13:13:47,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:47,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113512177] [2020-10-11 13:13:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:47,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113512177] [2020-10-11 13:13:47,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412292430] [2020-10-11 13:13:47,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:47,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:47,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:47,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:13:47,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:47,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:47,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:47,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:13:47,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249587110] [2020-10-11 13:13:47,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:13:47,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:47,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:13:47,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:47,938 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-11 13:13:48,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:48,207 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-11 13:13:48,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:48,208 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:13:48,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:48,209 INFO L225 Difference]: With dead ends: 90 [2020-10-11 13:13:48,209 INFO L226 Difference]: Without dead ends: 84 [2020-10-11 13:13:48,209 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:13:48,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-11 13:13:48,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-11 13:13:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:48,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-11 13:13:48,212 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-11 13:13:48,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:48,212 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-11 13:13:48,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:13:48,213 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-11 13:13:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:13:48,213 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:48,213 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:48,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:48,422 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:48,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:48,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-11 13:13:48,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:48,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062896202] [2020-10-11 13:13:48,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:48,557 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:48,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062896202] [2020-10-11 13:13:48,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397299924] [2020-10-11 13:13:48,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:48,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-11 13:13:48,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:48,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:13:48,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:48,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:48,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:13:48,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448895210] [2020-10-11 13:13:48,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:48,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:48,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:48,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:48,618 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-11 13:13:48,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:48,907 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-11 13:13:48,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:48,907 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:13:48,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:48,908 INFO L225 Difference]: With dead ends: 91 [2020-10-11 13:13:48,908 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 13:13:48,908 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:13:48,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 13:13:48,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-11 13:13:48,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-11 13:13:48,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-11 13:13:48,911 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-11 13:13:48,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:48,911 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-11 13:13:48,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:48,911 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-11 13:13:48,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:13:48,911 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:48,912 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:49,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:49,113 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:49,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:49,113 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-11 13:13:49,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:49,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868749215] [2020-10-11 13:13:49,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:49,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868749215] [2020-10-11 13:13:49,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797170973] [2020-10-11 13:13:49,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:49,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 13:13:49,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:49,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:13:49,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:49,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:49,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:49,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:13:49,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697882291] [2020-10-11 13:13:49,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:13:49,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:49,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:13:49,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:49,377 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-11 13:13:49,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:49,834 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-11 13:13:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:49,835 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:13:49,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:49,836 INFO L225 Difference]: With dead ends: 99 [2020-10-11 13:13:49,836 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 13:13:49,836 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:13:49,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 13:13:49,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-11 13:13:49,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:13:49,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-11 13:13:49,839 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-11 13:13:49,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:49,839 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-11 13:13:49,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:13:49,840 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-11 13:13:49,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:13:49,840 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:49,841 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:50,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:50,049 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:50,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:50,050 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-11 13:13:50,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:50,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274770226] [2020-10-11 13:13:50,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:50,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274770226] [2020-10-11 13:13:50,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474248505] [2020-10-11 13:13:50,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:50,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:13:50,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:50,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:50,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:13:50,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776071537] [2020-10-11 13:13:50,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:50,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:50,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:50,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:50,286 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-11 13:13:50,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:50,603 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-11 13:13:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:13:50,604 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:13:50,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:50,604 INFO L225 Difference]: With dead ends: 99 [2020-10-11 13:13:50,604 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 13:13:50,604 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:13:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 13:13:50,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-11 13:13:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-11 13:13:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-11 13:13:50,606 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-11 13:13:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:50,606 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-11 13:13:50,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-11 13:13:50,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:13:50,607 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:50,607 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:50,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-11 13:13:50,808 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:50,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:50,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-11 13:13:50,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:50,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458555686] [2020-10-11 13:13:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:50,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458555686] [2020-10-11 13:13:50,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470032351] [2020-10-11 13:13:50,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:50,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:50,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:50,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:13:50,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:51,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:51,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:51,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:13:51,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400729114] [2020-10-11 13:13:51,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:13:51,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:51,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:13:51,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:51,022 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-11 13:13:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:51,446 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-11 13:13:51,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:13:51,447 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:13:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:51,447 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:13:51,448 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 13:13:51,448 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:13:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 13:13:51,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-11 13:13:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-11 13:13:51,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-11 13:13:51,451 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-11 13:13:51,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:51,451 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-11 13:13:51,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:13:51,451 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-11 13:13:51,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:13:51,451 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:51,451 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:51,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:51,652 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:51,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:51,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-11 13:13:51,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:51,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243829115] [2020-10-11 13:13:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:51,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243829115] [2020-10-11 13:13:51,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739581577] [2020-10-11 13:13:51,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:51,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 13:13:51,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:51,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:13:51,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:51,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:51,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:13:51,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954800781] [2020-10-11 13:13:51,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:51,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:51,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:51,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:51,829 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-11 13:13:52,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:52,212 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-11 13:13:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:13:52,213 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:13:52,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:52,214 INFO L225 Difference]: With dead ends: 97 [2020-10-11 13:13:52,214 INFO L226 Difference]: Without dead ends: 91 [2020-10-11 13:13:52,215 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 13:13:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-11 13:13:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-11 13:13:52,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:13:52,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:13:52,217 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-11 13:13:52,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:52,217 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:13:52,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:52,218 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:13:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:13:52,218 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:52,218 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:52,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-11 13:13:52,419 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:52,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:52,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-11 13:13:52,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:52,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826738322] [2020-10-11 13:13:52,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:52,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826738322] [2020-10-11 13:13:52,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118994127] [2020-10-11 13:13:52,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:52,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:52,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:52,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:13:52,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:52,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:52,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:52,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:13:52,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358273318] [2020-10-11 13:13:52,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:13:52,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:52,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:13:52,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:52,640 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-11 13:13:53,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:53,132 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-11 13:13:53,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:13:53,132 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:13:53,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:53,133 INFO L225 Difference]: With dead ends: 94 [2020-10-11 13:13:53,134 INFO L226 Difference]: Without dead ends: 88 [2020-10-11 13:13:53,135 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 13:13:53,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-11 13:13:53,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-11 13:13:53,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:13:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:13:53,137 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-11 13:13:53,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:53,138 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:13:53,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:13:53,138 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:13:53,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:13:53,138 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:53,138 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:53,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:53,339 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:53,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:53,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-11 13:13:53,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:53,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289414840] [2020-10-11 13:13:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:53,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289414840] [2020-10-11 13:13:53,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308797833] [2020-10-11 13:13:53,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:53,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-11 13:13:53,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:53,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:13:53,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:53,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:53,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:13:53,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421158772] [2020-10-11 13:13:53,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:53,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:53,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:53,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:53,509 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-11 13:13:53,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:53,936 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-11 13:13:53,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:13:53,936 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:13:53,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:53,937 INFO L225 Difference]: With dead ends: 95 [2020-10-11 13:13:53,937 INFO L226 Difference]: Without dead ends: 89 [2020-10-11 13:13:53,938 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:13:53,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-11 13:13:53,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-11 13:13:53,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-11 13:13:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-11 13:13:53,940 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-11 13:13:53,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:53,940 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-11 13:13:53,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:53,941 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-11 13:13:53,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:13:53,941 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:53,941 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:54,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-11 13:13:54,146 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:54,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:54,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-11 13:13:54,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:54,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317914579] [2020-10-11 13:13:54,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:54,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317914579] [2020-10-11 13:13:54,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510101975] [2020-10-11 13:13:54,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:54,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 13:13:54,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:54,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:13:54,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:54,324 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:54,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:54,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:13:54,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556670331] [2020-10-11 13:13:54,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:13:54,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:54,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:13:54,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:54,336 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-11 13:13:54,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:54,890 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-11 13:13:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:13:54,891 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:13:54,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:54,892 INFO L225 Difference]: With dead ends: 92 [2020-10-11 13:13:54,892 INFO L226 Difference]: Without dead ends: 86 [2020-10-11 13:13:54,892 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:13:54,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-11 13:13:54,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-11 13:13:54,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:13:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-11 13:13:54,894 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-11 13:13:54,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:54,895 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-11 13:13:54,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:13:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-11 13:13:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:13:54,895 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:54,896 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:55,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:55,103 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:55,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:55,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-11 13:13:55,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:55,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647121308] [2020-10-11 13:13:55,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:55,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647121308] [2020-10-11 13:13:55,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973487907] [2020-10-11 13:13:55,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:55,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:13:55,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:55,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:55,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:13:55,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250843388] [2020-10-11 13:13:55,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:55,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:55,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:55,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:55,272 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-11 13:13:55,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:55,740 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-11 13:13:55,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:13:55,741 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:13:55,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:55,742 INFO L225 Difference]: With dead ends: 112 [2020-10-11 13:13:55,742 INFO L226 Difference]: Without dead ends: 106 [2020-10-11 13:13:55,743 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 13:13:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-11 13:13:55,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-11 13:13:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:13:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-11 13:13:55,746 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-11 13:13:55,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:55,746 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-11 13:13:55,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:55,746 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-11 13:13:55,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:13:55,747 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:55,747 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:55,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:55,951 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:55,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:55,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-11 13:13:55,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:55,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814227727] [2020-10-11 13:13:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:56,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814227727] [2020-10-11 13:13:56,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968179414] [2020-10-11 13:13:56,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:56,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:56,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:56,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:13:56,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:56,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:56,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:56,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:13:56,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178046412] [2020-10-11 13:13:56,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:13:56,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:56,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:13:56,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:56,132 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-11 13:13:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:56,714 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-11 13:13:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:13:56,714 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:13:56,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:56,715 INFO L225 Difference]: With dead ends: 93 [2020-10-11 13:13:56,715 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 13:13:56,716 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:13:56,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 13:13:56,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-11 13:13:56,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-11 13:13:56,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-11 13:13:56,718 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-11 13:13:56,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:56,718 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-11 13:13:56,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:13:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-11 13:13:56,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:13:56,719 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:56,719 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:56,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:56,920 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:56,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:56,920 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-11 13:13:56,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:56,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380331977] [2020-10-11 13:13:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:57,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380331977] [2020-10-11 13:13:57,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883467740] [2020-10-11 13:13:57,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:57,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 13:13:57,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:57,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:13:57,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:57,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:57,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:13:57,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421265876] [2020-10-11 13:13:57,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:13:57,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:57,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:13:57,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:57,145 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-11 13:13:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:57,423 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-11 13:13:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:57,424 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:13:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:57,425 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:13:57,425 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:13:57,425 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:13:57,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:13:57,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-11 13:13:57,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:13:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:13:57,428 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-11 13:13:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:57,428 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:13:57,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:13:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:13:57,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:13:57,429 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:57,429 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:57,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:57,636 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:57,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:57,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-11 13:13:57,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:57,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502257541] [2020-10-11 13:13:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:57,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502257541] [2020-10-11 13:13:57,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651723436] [2020-10-11 13:13:57,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:57,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:57,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:57,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:13:57,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:57,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:57,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:57,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:13:57,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938152565] [2020-10-11 13:13:57,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:13:57,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:57,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:13:57,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:13:57,887 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-11 13:13:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:58,242 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-11 13:13:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:58,242 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:13:58,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:58,244 INFO L225 Difference]: With dead ends: 101 [2020-10-11 13:13:58,244 INFO L226 Difference]: Without dead ends: 95 [2020-10-11 13:13:58,244 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:13:58,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-11 13:13:58,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-11 13:13:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:13:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:13:58,247 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-11 13:13:58,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:58,247 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:13:58,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:13:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:13:58,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:13:58,248 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:58,248 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:58,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:58,449 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:58,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:58,449 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-11 13:13:58,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:58,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412987481] [2020-10-11 13:13:58,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:58,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412987481] [2020-10-11 13:13:58,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753327108] [2020-10-11 13:13:58,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:58,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-11 13:13:58,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:58,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:13:58,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:58,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:58,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:13:58,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297878421] [2020-10-11 13:13:58,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:13:58,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:58,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:13:58,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:58,654 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-11 13:13:58,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:58,981 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-11 13:13:58,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:58,982 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:13:58,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:58,983 INFO L225 Difference]: With dead ends: 98 [2020-10-11 13:13:58,983 INFO L226 Difference]: Without dead ends: 92 [2020-10-11 13:13:58,984 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:13:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-11 13:13:58,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-11 13:13:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:13:58,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:13:58,987 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-11 13:13:58,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:58,987 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:13:58,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:13:58,987 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:13:58,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:13:58,988 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:58,988 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:59,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:59,194 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:59,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:59,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-11 13:13:59,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:59,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772581962] [2020-10-11 13:13:59,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:59,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772581962] [2020-10-11 13:13:59,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602279628] [2020-10-11 13:13:59,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:59,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 13:13:59,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:59,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:13:59,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:59,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:59,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:59,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:13:59,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774912912] [2020-10-11 13:13:59,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:13:59,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:59,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:13:59,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:13:59,414 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-11 13:13:59,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:59,858 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-11 13:13:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:13:59,859 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:13:59,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:59,860 INFO L225 Difference]: With dead ends: 97 [2020-10-11 13:13:59,860 INFO L226 Difference]: Without dead ends: 91 [2020-10-11 13:13:59,861 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 13:13:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-11 13:13:59,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-11 13:13:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:13:59,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:13:59,863 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-11 13:13:59,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:59,864 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:13:59,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:13:59,864 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:13:59,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:13:59,864 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:59,864 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:00,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:00,072 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:00,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-11 13:14:00,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:00,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815890553] [2020-10-11 13:14:00,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:00,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815890553] [2020-10-11 13:14:00,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283789210] [2020-10-11 13:14:00,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:00,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:00,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:00,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:00,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:14:00,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148326297] [2020-10-11 13:14:00,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:00,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:00,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:00,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:00,260 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-11 13:14:00,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:00,641 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-11 13:14:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:14:00,642 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:14:00,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:00,643 INFO L225 Difference]: With dead ends: 94 [2020-10-11 13:14:00,643 INFO L226 Difference]: Without dead ends: 88 [2020-10-11 13:14:00,643 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:14:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-11 13:14:00,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-11 13:14:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:14:00,646 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-11 13:14:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:00,646 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:14:00,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:00,646 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:14:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:00,646 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:00,647 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:00,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-11 13:14:00,856 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:00,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:00,856 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-11 13:14:00,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:00,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046040915] [2020-10-11 13:14:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:00,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046040915] [2020-10-11 13:14:00,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443294644] [2020-10-11 13:14:00,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:01,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:01,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:01,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:01,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:01,098 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:01,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:01,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:01,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005888443] [2020-10-11 13:14:01,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:01,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:01,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:01,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:01,117 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-11 13:14:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:01,629 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-11 13:14:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:14:01,630 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:01,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:01,631 INFO L225 Difference]: With dead ends: 93 [2020-10-11 13:14:01,631 INFO L226 Difference]: Without dead ends: 87 [2020-10-11 13:14:01,631 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:14:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-11 13:14:01,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-11 13:14:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:14:01,633 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-11 13:14:01,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:01,633 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:14:01,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:14:01,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:01,634 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:01,634 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:01,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:01,835 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:01,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:01,835 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-11 13:14:01,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:01,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249528249] [2020-10-11 13:14:01,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:01,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249528249] [2020-10-11 13:14:01,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624752520] [2020-10-11 13:14:01,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:02,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 13:14:02,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:02,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:02,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:02,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:02,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:14:02,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690793471] [2020-10-11 13:14:02,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:02,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:02,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:02,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:02,025 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-11 13:14:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:02,451 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-11 13:14:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:02,451 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:14:02,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:02,452 INFO L225 Difference]: With dead ends: 90 [2020-10-11 13:14:02,453 INFO L226 Difference]: Without dead ends: 84 [2020-10-11 13:14:02,453 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 13:14:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-11 13:14:02,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-11 13:14:02,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:14:02,455 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-11 13:14:02,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:02,455 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:14:02,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:02,455 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:14:02,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:02,456 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:02,456 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:02,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-11 13:14:02,664 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:02,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:02,664 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-11 13:14:02,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:02,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976496179] [2020-10-11 13:14:02,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:02,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976496179] [2020-10-11 13:14:02,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133860445] [2020-10-11 13:14:02,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:02,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:02,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:02,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:02,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:02,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:02,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:02,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:02,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20528003] [2020-10-11 13:14:02,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:02,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:02,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:02,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:02,879 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-11 13:14:03,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:03,475 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-11 13:14:03,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:14:03,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:03,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:03,476 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:14:03,476 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:14:03,477 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 13:14:03,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:14:03,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-11 13:14:03,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:14:03,479 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-11 13:14:03,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:03,480 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:14:03,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:03,480 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:14:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:03,480 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:03,480 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:03,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:03,681 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:03,682 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-11 13:14:03,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:03,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278301347] [2020-10-11 13:14:03,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:03,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278301347] [2020-10-11 13:14:03,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652873839] [2020-10-11 13:14:03,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:03,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-11 13:14:03,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:03,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:03,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:03,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:03,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:14:03,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462066730] [2020-10-11 13:14:03,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:03,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:03,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:03,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:03,866 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-11 13:14:04,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:04,333 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-11 13:14:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:14:04,333 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:14:04,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:04,335 INFO L225 Difference]: With dead ends: 86 [2020-10-11 13:14:04,335 INFO L226 Difference]: Without dead ends: 80 [2020-10-11 13:14:04,335 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:14:04,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-11 13:14:04,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-11 13:14:04,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:14:04,338 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-11 13:14:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:04,338 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:14:04,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:14:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:04,339 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:04,339 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:04,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:04,545 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:04,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:04,545 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-11 13:14:04,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:04,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201005636] [2020-10-11 13:14:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:04,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201005636] [2020-10-11 13:14:04,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571468087] [2020-10-11 13:14:04,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:04,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 13:14:04,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:04,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:04,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:04,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:04,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:04,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:04,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695926494] [2020-10-11 13:14:04,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:04,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:04,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:04,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:04,734 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-11 13:14:05,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:05,379 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-11 13:14:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:14:05,380 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:05,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:05,381 INFO L225 Difference]: With dead ends: 85 [2020-10-11 13:14:05,381 INFO L226 Difference]: Without dead ends: 79 [2020-10-11 13:14:05,381 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:14:05,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-11 13:14:05,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-11 13:14:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:14:05,384 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-11 13:14:05,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:05,384 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:14:05,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:05,384 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:14:05,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:05,385 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:05,385 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:05,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:05,594 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:05,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:05,594 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-11 13:14:05,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:05,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390890633] [2020-10-11 13:14:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:05,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390890633] [2020-10-11 13:14:05,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755713630] [2020-10-11 13:14:05,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:05,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:05,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:05,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:05,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:14:05,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340050921] [2020-10-11 13:14:05,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:05,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:05,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:05,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:05,779 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-11 13:14:06,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:06,319 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-11 13:14:06,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:06,319 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:14:06,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:06,320 INFO L225 Difference]: With dead ends: 101 [2020-10-11 13:14:06,320 INFO L226 Difference]: Without dead ends: 95 [2020-10-11 13:14:06,321 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:14:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-11 13:14:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-11 13:14:06,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-11 13:14:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-11 13:14:06,324 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-11 13:14:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:06,324 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-11 13:14:06,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:06,325 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-11 13:14:06,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:06,325 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:06,325 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:06,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:06,536 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:06,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:06,536 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-11 13:14:06,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:06,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839175209] [2020-10-11 13:14:06,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:06,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839175209] [2020-10-11 13:14:06,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690902703] [2020-10-11 13:14:06,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:06,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:06,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:06,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:06,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:06,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:06,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:06,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:06,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791274122] [2020-10-11 13:14:06,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:06,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:06,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:06,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:06,746 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-11 13:14:07,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:07,425 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-10-11 13:14:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:14:07,426 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:07,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:07,427 INFO L225 Difference]: With dead ends: 82 [2020-10-11 13:14:07,427 INFO L226 Difference]: Without dead ends: 74 [2020-10-11 13:14:07,427 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:14:07,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-11 13:14:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-11 13:14:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-11 13:14:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-11 13:14:07,430 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-11 13:14:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:07,430 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-11 13:14:07,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:07,430 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-11 13:14:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:07,430 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:07,431 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:07,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:07,638 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:07,639 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-11 13:14:07,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:07,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644483471] [2020-10-11 13:14:07,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:07,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644483471] [2020-10-11 13:14:07,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879553806] [2020-10-11 13:14:07,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:07,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 13:14:07,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:07,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:07,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:07,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:14:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:07,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:07,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:07,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810613839] [2020-10-11 13:14:07,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:07,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:07,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:07,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:07,899 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-11 13:14:08,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:08,536 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-11 13:14:08,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:08,537 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:08,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:08,538 INFO L225 Difference]: With dead ends: 92 [2020-10-11 13:14:08,538 INFO L226 Difference]: Without dead ends: 87 [2020-10-11 13:14:08,538 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:14:08,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-11 13:14:08,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-11 13:14:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:14:08,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-11 13:14:08,540 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-11 13:14:08,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:08,541 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-11 13:14:08,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:08,541 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-11 13:14:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:08,541 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:08,542 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:08,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:08,749 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:08,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:08,749 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-11 13:14:08,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:08,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532082737] [2020-10-11 13:14:08,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:08,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532082737] [2020-10-11 13:14:08,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811955548] [2020-10-11 13:14:08,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:08,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:08,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:08,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:08,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:08,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:14:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:08,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:08,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:08,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129557029] [2020-10-11 13:14:08,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:08,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:08,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:08,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:08,954 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-11 13:14:09,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:09,638 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-11 13:14:09,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:09,638 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:09,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:09,639 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:14:09,640 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:14:09,640 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:14:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:14:09,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-11 13:14:09,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:14:09,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-11 13:14:09,642 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-11 13:14:09,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:09,642 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-11 13:14:09,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-11 13:14:09,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:09,643 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:09,643 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:09,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-11 13:14:09,852 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:09,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:09,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-11 13:14:09,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:09,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181728148] [2020-10-11 13:14:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:10,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181728148] [2020-10-11 13:14:10,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311979953] [2020-10-11 13:14:10,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:10,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 13:14:10,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:10,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:10,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:10,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:10,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:10,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182161104] [2020-10-11 13:14:10,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:10,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:10,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:10,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:10,101 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-11 13:14:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:10,371 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-11 13:14:10,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:14:10,372 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:10,373 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:14:10,373 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:14:10,373 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:14:10,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:14:10,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-11 13:14:10,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:14:10,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-11 13:14:10,375 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-11 13:14:10,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:10,375 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-11 13:14:10,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:10,375 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-11 13:14:10,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:10,375 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:10,375 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:10,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:10,576 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:10,577 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-11 13:14:10,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:10,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030622632] [2020-10-11 13:14:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:10,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030622632] [2020-10-11 13:14:10,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185180143] [2020-10-11 13:14:10,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:10,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 13:14:10,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:10,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:10,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:10,831 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:10,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:10,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:10,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439273019] [2020-10-11 13:14:10,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:10,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:10,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:10,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:10,849 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-11 13:14:11,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:11,147 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-11 13:14:11,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:14:11,147 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:11,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:11,148 INFO L225 Difference]: With dead ends: 98 [2020-10-11 13:14:11,148 INFO L226 Difference]: Without dead ends: 92 [2020-10-11 13:14:11,149 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:14:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-11 13:14:11,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-11 13:14:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-11 13:14:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-11 13:14:11,151 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-11 13:14:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:11,151 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-11 13:14:11,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:11,151 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-11 13:14:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:11,152 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:11,152 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:11,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-11 13:14:11,353 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:11,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:11,353 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-11 13:14:11,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:11,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124107192] [2020-10-11 13:14:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:11,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124107192] [2020-10-11 13:14:11,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154491485] [2020-10-11 13:14:11,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:11,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:11,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:11,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:11,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:11,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39095882] [2020-10-11 13:14:11,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:11,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:11,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:11,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:11,581 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-11 13:14:11,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:11,995 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-11 13:14:11,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:14:11,995 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:11,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:11,996 INFO L225 Difference]: With dead ends: 99 [2020-10-11 13:14:11,996 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 13:14:11,997 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:14:11,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 13:14:11,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-11 13:14:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:14:12,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-11 13:14:12,000 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-11 13:14:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:12,001 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-11 13:14:12,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:12,001 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-11 13:14:12,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:12,002 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:12,002 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:12,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:12,203 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:12,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:12,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-11 13:14:12,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:12,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622809250] [2020-10-11 13:14:12,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:12,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622809250] [2020-10-11 13:14:12,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510859814] [2020-10-11 13:14:12,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:12,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:12,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:12,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:12,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:12,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:12,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:12,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:12,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027932564] [2020-10-11 13:14:12,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:12,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:12,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:12,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:12,565 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-11 13:14:12,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:12,971 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-11 13:14:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:14:12,971 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:12,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:12,972 INFO L225 Difference]: With dead ends: 109 [2020-10-11 13:14:12,972 INFO L226 Difference]: Without dead ends: 103 [2020-10-11 13:14:12,972 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 13:14:12,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-11 13:14:12,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-11 13:14:12,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:14:12,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-11 13:14:12,975 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-11 13:14:12,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:12,975 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-11 13:14:12,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:12,975 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-11 13:14:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:12,976 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:12,976 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:13,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:13,183 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:13,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:13,184 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-11 13:14:13,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:13,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540974061] [2020-10-11 13:14:13,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:13,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540974061] [2020-10-11 13:14:13,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115101279] [2020-10-11 13:14:13,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:13,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 13:14:13,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:13,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:13,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:13,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:13,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:13,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945522525] [2020-10-11 13:14:13,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:13,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:13,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:13,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:13,399 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-11 13:14:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:13,836 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-11 13:14:13,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:13,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:13,838 INFO L225 Difference]: With dead ends: 109 [2020-10-11 13:14:13,838 INFO L226 Difference]: Without dead ends: 103 [2020-10-11 13:14:13,838 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:14:13,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-11 13:14:13,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-11 13:14:13,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-11 13:14:13,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-11 13:14:13,841 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-11 13:14:13,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:13,841 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-11 13:14:13,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:13,841 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-11 13:14:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:13,842 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:13,842 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:14,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-11 13:14:14,046 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:14,046 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-11 13:14:14,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:14,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111773088] [2020-10-11 13:14:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:14,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111773088] [2020-10-11 13:14:14,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976954880] [2020-10-11 13:14:14,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:14,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:14,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:14,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:14,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:14,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:14,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:14,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:14,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909542930] [2020-10-11 13:14:14,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:14,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:14,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:14,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:14,288 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-11 13:14:14,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:14,770 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-11 13:14:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:14:14,771 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:14,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:14,772 INFO L225 Difference]: With dead ends: 106 [2020-10-11 13:14:14,772 INFO L226 Difference]: Without dead ends: 100 [2020-10-11 13:14:14,772 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:14:14,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-11 13:14:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-11 13:14:14,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:14:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-11 13:14:14,774 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-11 13:14:14,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:14,775 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-11 13:14:14,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:14,775 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-11 13:14:14,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:14,775 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:14,775 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:14,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-11 13:14:14,984 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:14,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:14,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-11 13:14:14,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:14,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406136804] [2020-10-11 13:14:14,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:15,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406136804] [2020-10-11 13:14:15,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480579843] [2020-10-11 13:14:15,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:15,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 13:14:15,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:15,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:15,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:15,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:15,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:15,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968065763] [2020-10-11 13:14:15,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:15,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:15,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:15,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:15,189 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-11 13:14:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:15,643 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-11 13:14:15,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:14:15,644 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:15,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:15,645 INFO L225 Difference]: With dead ends: 107 [2020-10-11 13:14:15,645 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:14:15,645 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 13:14:15,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:14:15,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-11 13:14:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-11 13:14:15,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-11 13:14:15,648 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-11 13:14:15,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:15,648 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-11 13:14:15,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:15,648 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-11 13:14:15,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:15,648 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:15,648 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:15,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:15,849 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:15,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-11 13:14:15,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:15,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058093294] [2020-10-11 13:14:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:16,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058093294] [2020-10-11 13:14:16,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489977518] [2020-10-11 13:14:16,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:16,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 13:14:16,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:16,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:16,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:16,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:16,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:16,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:16,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373906430] [2020-10-11 13:14:16,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:16,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:16,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:16,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:16,092 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-11 13:14:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:16,666 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-11 13:14:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:14:16,667 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:16,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:16,668 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:14:16,668 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:14:16,668 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:14:16,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:14:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-11 13:14:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 13:14:16,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-11 13:14:16,670 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-11 13:14:16,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:16,671 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-11 13:14:16,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:16,671 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-11 13:14:16,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:16,673 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:16,673 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:16,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-11 13:14:16,874 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:16,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:16,875 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-11 13:14:16,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:16,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097026666] [2020-10-11 13:14:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:17,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097026666] [2020-10-11 13:14:17,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833832059] [2020-10-11 13:14:17,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:17,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:17,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:17,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:17,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:17,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852251534] [2020-10-11 13:14:17,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:17,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:17,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:17,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:17,077 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-11 13:14:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:17,579 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-11 13:14:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:17,580 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:17,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:17,580 INFO L225 Difference]: With dead ends: 105 [2020-10-11 13:14:17,580 INFO L226 Difference]: Without dead ends: 99 [2020-10-11 13:14:17,581 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:14:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-11 13:14:17,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-11 13:14:17,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:14:17,583 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-11 13:14:17,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:17,583 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:14:17,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:17,584 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:14:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:17,584 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:17,584 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:17,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:17,788 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:17,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-11 13:14:17,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:17,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806832255] [2020-10-11 13:14:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:17,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806832255] [2020-10-11 13:14:17,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918421534] [2020-10-11 13:14:17,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:17,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:17,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:17,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:17,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:18,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:18,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:18,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:18,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309378252] [2020-10-11 13:14:18,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:18,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:18,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:18,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:18,018 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-11 13:14:18,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:18,647 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-11 13:14:18,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:14:18,648 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:18,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:18,649 INFO L225 Difference]: With dead ends: 102 [2020-10-11 13:14:18,649 INFO L226 Difference]: Without dead ends: 96 [2020-10-11 13:14:18,649 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:14:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-11 13:14:18,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-11 13:14:18,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:18,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:14:18,651 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-11 13:14:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:18,651 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:14:18,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:18,652 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:14:18,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:18,652 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:18,652 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:18,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-11 13:14:18,853 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:18,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:18,853 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-11 13:14:18,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:18,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586375948] [2020-10-11 13:14:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:18,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586375948] [2020-10-11 13:14:18,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548404736] [2020-10-11 13:14:18,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:19,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 13:14:19,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:19,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:19,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:19,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:19,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:19,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138812823] [2020-10-11 13:14:19,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:19,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:19,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:19,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:19,054 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-11 13:14:19,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:19,599 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-11 13:14:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:14:19,599 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:19,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:19,600 INFO L225 Difference]: With dead ends: 103 [2020-10-11 13:14:19,600 INFO L226 Difference]: Without dead ends: 97 [2020-10-11 13:14:19,600 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:14:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-11 13:14:19,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-11 13:14:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-11 13:14:19,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-11 13:14:19,603 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-11 13:14:19,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:19,603 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-11 13:14:19,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:19,603 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-11 13:14:19,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:19,604 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:19,604 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:19,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:19,806 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:19,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:19,806 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-11 13:14:19,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:19,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547965678] [2020-10-11 13:14:19,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:19,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547965678] [2020-10-11 13:14:19,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956689619] [2020-10-11 13:14:19,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:19,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:19,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:19,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:19,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:20,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:20,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:20,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:20,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538831784] [2020-10-11 13:14:20,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:20,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:20,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:20,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:20,018 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-11 13:14:20,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:20,710 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-11 13:14:20,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:14:20,711 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:20,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:20,711 INFO L225 Difference]: With dead ends: 100 [2020-10-11 13:14:20,711 INFO L226 Difference]: Without dead ends: 94 [2020-10-11 13:14:20,712 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:14:20,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-11 13:14:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-11 13:14:20,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:14:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-11 13:14:20,714 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-11 13:14:20,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:20,715 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-11 13:14:20,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:20,715 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-11 13:14:20,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:20,715 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:20,715 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:20,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-11 13:14:20,918 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:20,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:20,918 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-11 13:14:20,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:20,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700442860] [2020-10-11 13:14:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:21,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700442860] [2020-10-11 13:14:21,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741692265] [2020-10-11 13:14:21,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:21,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 13:14:21,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:21,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:21,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:21,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:21,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:21,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906061101] [2020-10-11 13:14:21,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:21,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:21,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:21,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:21,123 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-11 13:14:21,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:21,754 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-11 13:14:21,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:14:21,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:21,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:21,755 INFO L225 Difference]: With dead ends: 120 [2020-10-11 13:14:21,755 INFO L226 Difference]: Without dead ends: 114 [2020-10-11 13:14:21,756 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:14:21,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-11 13:14:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-11 13:14:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 13:14:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-11 13:14:21,757 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-11 13:14:21,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:21,758 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-11 13:14:21,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:21,758 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-11 13:14:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:21,758 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:21,758 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:21,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-11 13:14:21,959 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:21,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:21,960 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-11 13:14:21,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:21,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283718240] [2020-10-11 13:14:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:22,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283718240] [2020-10-11 13:14:22,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565111703] [2020-10-11 13:14:22,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:22,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 13:14:22,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:22,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:22,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:22,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:22,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:22,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:22,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538436896] [2020-10-11 13:14:22,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:22,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:22,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:22,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:22,203 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-11 13:14:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:22,922 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-11 13:14:22,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:14:22,922 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:22,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:22,923 INFO L225 Difference]: With dead ends: 101 [2020-10-11 13:14:22,923 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 13:14:22,923 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:14:22,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 13:14:22,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-11 13:14:22,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-11 13:14:22,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-11 13:14:22,925 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-11 13:14:22,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:22,926 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-11 13:14:22,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:22,926 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-11 13:14:22,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:22,926 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:22,926 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:23,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:23,127 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:23,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:23,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-11 13:14:23,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:23,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261764474] [2020-10-11 13:14:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:23,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261764474] [2020-10-11 13:14:23,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985487630] [2020-10-11 13:14:23,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:23,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:23,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:23,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:23,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:14:23,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271087233] [2020-10-11 13:14:23,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:23,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:23,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:23,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:23,390 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-11 13:14:23,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:23,724 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-11 13:14:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:14:23,724 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:14:23,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:23,725 INFO L225 Difference]: With dead ends: 114 [2020-10-11 13:14:23,725 INFO L226 Difference]: Without dead ends: 108 [2020-10-11 13:14:23,726 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:14:23,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-11 13:14:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-11 13:14:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:14:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:14:23,728 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:14:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:23,728 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:14:23,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:14:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:23,729 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:23,729 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:23,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:23,933 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:23,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:23,934 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-11 13:14:23,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:23,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402659485] [2020-10-11 13:14:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:24,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402659485] [2020-10-11 13:14:24,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333284047] [2020-10-11 13:14:24,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:24,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:24,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:24,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:24,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:24,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:24,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:24,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:14:24,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198160851] [2020-10-11 13:14:24,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:24,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:24,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:24,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:24,218 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:14:24,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:24,642 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-11 13:14:24,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:14:24,642 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:14:24,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:24,642 INFO L225 Difference]: With dead ends: 111 [2020-10-11 13:14:24,643 INFO L226 Difference]: Without dead ends: 105 [2020-10-11 13:14:24,643 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:14:24,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-11 13:14:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-11 13:14:24,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:14:24,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:14:24,645 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:14:24,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:24,645 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:14:24,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:14:24,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:24,645 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:24,645 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:24,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-11 13:14:24,846 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:24,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:24,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-11 13:14:24,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:24,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463048584] [2020-10-11 13:14:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:25,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463048584] [2020-10-11 13:14:25,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981176174] [2020-10-11 13:14:25,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:25,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 13:14:25,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:25,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:25,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:25,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:25,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:14:25,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720928139] [2020-10-11 13:14:25,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:25,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:25,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:25,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:25,102 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:14:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:25,498 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-11 13:14:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:14:25,499 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:14:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:25,500 INFO L225 Difference]: With dead ends: 108 [2020-10-11 13:14:25,500 INFO L226 Difference]: Without dead ends: 102 [2020-10-11 13:14:25,500 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 13:14:25,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-11 13:14:25,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-11 13:14:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:14:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:14:25,502 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:14:25,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:25,502 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:14:25,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:25,503 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:14:25,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:25,503 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:25,503 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:25,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:25,709 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:25,709 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-11 13:14:25,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:25,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690610568] [2020-10-11 13:14:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:25,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690610568] [2020-10-11 13:14:25,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295617812] [2020-10-11 13:14:25,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:25,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:25,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:25,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:25,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:25,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:25,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:25,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:14:25,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657591457] [2020-10-11 13:14:25,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:25,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:25,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:25,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:25,973 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:14:26,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:26,479 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-11 13:14:26,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:14:26,480 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:14:26,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:26,480 INFO L225 Difference]: With dead ends: 107 [2020-10-11 13:14:26,480 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:14:26,481 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 13:14:26,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:14:26,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-11 13:14:26,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:14:26,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:14:26,483 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:14:26,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:26,484 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:14:26,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:26,484 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:14:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:26,484 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:26,484 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:26,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-11 13:14:26,688 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:26,688 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-11 13:14:26,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:26,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946716259] [2020-10-11 13:14:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:26,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946716259] [2020-10-11 13:14:26,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636977395] [2020-10-11 13:14:26,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:26,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 13:14:26,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:26,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:26,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:26,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:26,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:14:26,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272065000] [2020-10-11 13:14:26,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:26,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:26,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:26,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:26,925 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:14:27,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:27,407 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-11 13:14:27,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:27,408 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:14:27,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:27,409 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:14:27,409 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:14:27,409 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:14:27,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:14:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-11 13:14:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:14:27,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:14:27,411 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:14:27,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:27,411 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:14:27,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:14:27,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:27,412 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:27,412 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:27,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-11 13:14:27,616 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:27,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:27,616 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-11 13:14:27,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:27,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79233690] [2020-10-11 13:14:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:27,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79233690] [2020-10-11 13:14:27,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185264535] [2020-10-11 13:14:27,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:27,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 13:14:27,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:27,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:27,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:27,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:27,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:27,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:14:27,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857972744] [2020-10-11 13:14:27,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:27,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:27,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:27,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:27,867 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:14:28,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:28,451 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-11 13:14:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:14:28,452 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:14:28,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:28,452 INFO L225 Difference]: With dead ends: 103 [2020-10-11 13:14:28,452 INFO L226 Difference]: Without dead ends: 97 [2020-10-11 13:14:28,453 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:14:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-11 13:14:28,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-11 13:14:28,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:14:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:14:28,455 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:14:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:28,455 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:14:28,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:28,456 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:14:28,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:28,456 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:28,456 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:28,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-11 13:14:28,665 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:28,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-11 13:14:28,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:28,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722884279] [2020-10-11 13:14:28,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:28,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722884279] [2020-10-11 13:14:28,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545652498] [2020-10-11 13:14:28,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:28,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:28,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:28,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:28,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:14:28,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384750560] [2020-10-11 13:14:28,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:28,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:28,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:28,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:28,896 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:14:29,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:29,403 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-11 13:14:29,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:14:29,404 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:14:29,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:29,405 INFO L225 Difference]: With dead ends: 100 [2020-10-11 13:14:29,405 INFO L226 Difference]: Without dead ends: 94 [2020-10-11 13:14:29,405 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:14:29,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-11 13:14:29,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-11 13:14:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:14:29,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:14:29,408 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:14:29,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:29,408 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:14:29,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:14:29,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:29,409 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:29,409 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:29,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:29,618 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:29,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:29,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-11 13:14:29,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:29,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324704693] [2020-10-11 13:14:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:29,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324704693] [2020-10-11 13:14:29,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90959188] [2020-10-11 13:14:29,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:29,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:29,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:29,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:29,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:29,847 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:29,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:29,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:14:29,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263356079] [2020-10-11 13:14:29,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:29,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:29,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:29,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:29,860 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:14:30,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:30,543 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-11 13:14:30,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:14:30,544 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:14:30,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:30,544 INFO L225 Difference]: With dead ends: 99 [2020-10-11 13:14:30,544 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 13:14:30,545 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:14:30,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 13:14:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-11 13:14:30,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:14:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:14:30,548 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:14:30,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:30,548 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:14:30,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:30,548 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:14:30,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:30,549 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:30,549 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:30,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-11 13:14:30,758 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:30,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:30,758 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-11 13:14:30,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:30,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159429735] [2020-10-11 13:14:30,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:30,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159429735] [2020-10-11 13:14:30,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200066385] [2020-10-11 13:14:30,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:30,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 13:14:30,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:30,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:30,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:30,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:30,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:14:30,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899713793] [2020-10-11 13:14:30,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:30,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:30,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:30,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:30,987 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:14:31,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:31,575 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-11 13:14:31,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:31,575 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:14:31,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:31,576 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:14:31,576 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 13:14:31,576 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:14:31,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 13:14:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-11 13:14:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:14:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:14:31,579 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:14:31,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:31,579 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:14:31,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:14:31,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:31,579 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:31,579 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:31,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:31,782 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:31,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-11 13:14:31,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:31,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505651833] [2020-10-11 13:14:31,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:31,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505651833] [2020-10-11 13:14:31,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146530359] [2020-10-11 13:14:31,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:31,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:31,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:31,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:31,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:32,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:32,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:32,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:14:32,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474357302] [2020-10-11 13:14:32,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:32,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:32,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:32,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:32,032 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:14:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:32,788 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-11 13:14:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:14:32,789 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:14:32,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:32,790 INFO L225 Difference]: With dead ends: 95 [2020-10-11 13:14:32,790 INFO L226 Difference]: Without dead ends: 89 [2020-10-11 13:14:32,790 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:14:32,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-11 13:14:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-11 13:14:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:14:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:14:32,792 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:14:32,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:32,793 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:14:32,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:32,793 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:14:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:32,793 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:32,793 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:32,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:32,994 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:32,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-11 13:14:32,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:32,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194865563] [2020-10-11 13:14:32,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:33,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194865563] [2020-10-11 13:14:33,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868118964] [2020-10-11 13:14:33,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:33,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 13:14:33,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:33,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:33,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:33,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:33,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:14:33,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405066886] [2020-10-11 13:14:33,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:33,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:33,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:33,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:33,224 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:14:33,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:33,839 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-11 13:14:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:14:33,839 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:14:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:33,839 INFO L225 Difference]: With dead ends: 92 [2020-10-11 13:14:33,839 INFO L226 Difference]: Without dead ends: 86 [2020-10-11 13:14:33,840 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:14:33,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-11 13:14:33,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-11 13:14:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:14:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:14:33,842 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:14:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:33,843 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:14:33,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:33,843 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:14:33,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:33,844 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:33,844 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:34,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:34,053 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:34,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:34,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-11 13:14:34,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:34,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102495211] [2020-10-11 13:14:34,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:34,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102495211] [2020-10-11 13:14:34,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465386243] [2020-10-11 13:14:34,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:34,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 13:14:34,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:34,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:34,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:34,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:34,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:34,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:14:34,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682540214] [2020-10-11 13:14:34,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:34,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:34,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:34,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:34,302 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:14:35,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:35,156 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-11 13:14:35,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:14:35,157 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:14:35,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:35,157 INFO L225 Difference]: With dead ends: 91 [2020-10-11 13:14:35,158 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 13:14:35,158 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 13:14:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 13:14:35,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-11 13:14:35,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:14:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:14:35,161 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:14:35,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:35,162 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:14:35,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:35,162 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:14:35,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:35,162 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:35,163 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:35,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:35,371 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:35,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:35,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-11 13:14:35,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:35,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003516313] [2020-10-11 13:14:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:35,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003516313] [2020-10-11 13:14:35,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343002811] [2020-10-11 13:14:35,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:35,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:35,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:35,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:35,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:14:35,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187315660] [2020-10-11 13:14:35,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:35,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:35,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:35,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:35,613 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:14:36,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:36,488 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-11 13:14:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:14:36,489 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:14:36,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:36,490 INFO L225 Difference]: With dead ends: 107 [2020-10-11 13:14:36,490 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:14:36,490 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:14:36,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:14:36,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-11 13:14:36,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-11 13:14:36,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-11 13:14:36,494 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-11 13:14:36,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:36,494 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-11 13:14:36,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:36,494 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-11 13:14:36,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:36,495 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:36,495 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:36,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-11 13:14:36,705 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:36,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:36,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-11 13:14:36,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:36,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987420667] [2020-10-11 13:14:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:36,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987420667] [2020-10-11 13:14:36,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685596374] [2020-10-11 13:14:36,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:36,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:36,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:36,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:36,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:36,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:36,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:36,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:14:36,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700375715] [2020-10-11 13:14:36,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:36,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:36,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:36,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:36,962 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-11 13:14:37,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:37,820 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-11 13:14:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:14:37,821 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:14:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:37,821 INFO L225 Difference]: With dead ends: 88 [2020-10-11 13:14:37,821 INFO L226 Difference]: Without dead ends: 80 [2020-10-11 13:14:37,821 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:14:37,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-11 13:14:37,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-11 13:14:37,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:14:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-11 13:14:37,823 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-11 13:14:37,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:37,823 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-11 13:14:37,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-11 13:14:37,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:14:37,823 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:37,824 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:38,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-11 13:14:38,025 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:38,025 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-11 13:14:38,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:38,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463213068] [2020-10-11 13:14:38,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:38,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:38,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463213068] [2020-10-11 13:14:38,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160814810] [2020-10-11 13:14:38,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:38,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 13:14:38,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:38,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:14:38,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:38,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:14:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:38,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:38,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:14:38,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329127954] [2020-10-11 13:14:38,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:38,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:38,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:38,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:38,260 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-11 13:14:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:39,071 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-11 13:14:39,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:14:39,071 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:14:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:39,072 INFO L225 Difference]: With dead ends: 100 [2020-10-11 13:14:39,072 INFO L226 Difference]: Without dead ends: 95 [2020-10-11 13:14:39,072 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:14:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-11 13:14:39,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-11 13:14:39,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 13:14:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-11 13:14:39,075 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-11 13:14:39,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:39,075 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-11 13:14:39,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:39,075 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-11 13:14:39,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:39,075 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:39,075 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:39,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-11 13:14:39,276 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-11 13:14:39,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:39,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570105329] [2020-10-11 13:14:39,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:39,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570105329] [2020-10-11 13:14:39,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103256307] [2020-10-11 13:14:39,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:39,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:39,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:39,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:39,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:39,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:14:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:39,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:39,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:14:39,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112062036] [2020-10-11 13:14:39,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:14:39,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:39,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:14:39,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:14:39,528 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-11 13:14:40,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:40,422 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-11 13:14:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:14:40,422 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:14:40,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:40,423 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:14:40,423 INFO L226 Difference]: Without dead ends: 79 [2020-10-11 13:14:40,424 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:14:40,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-11 13:14:40,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-11 13:14:40,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:14:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-11 13:14:40,426 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-11 13:14:40,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:40,426 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-11 13:14:40,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:14:40,426 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-11 13:14:40,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:40,427 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:40,427 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:40,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-11 13:14:40,628 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:40,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:40,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-11 13:14:40,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:40,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757603378] [2020-10-11 13:14:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:40,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757603378] [2020-10-11 13:14:40,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799853564] [2020-10-11 13:14:40,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:40,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:14:40,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:40,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:40,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:40,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:40,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:14:40,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391763781] [2020-10-11 13:14:40,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:40,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:40,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:40,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:40,925 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-11 13:14:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:41,289 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-11 13:14:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:14:41,290 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:14:41,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:41,290 INFO L225 Difference]: With dead ends: 90 [2020-10-11 13:14:41,291 INFO L226 Difference]: Without dead ends: 84 [2020-10-11 13:14:41,291 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 13:14:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-11 13:14:41,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-11 13:14:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 13:14:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-11 13:14:41,293 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-11 13:14:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:41,293 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-11 13:14:41,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-11 13:14:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:41,294 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:41,294 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:41,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:41,497 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:41,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:41,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-11 13:14:41,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:41,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634571927] [2020-10-11 13:14:41,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:41,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634571927] [2020-10-11 13:14:41,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072783926] [2020-10-11 13:14:41,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:41,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:14:41,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:41,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:41,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:41,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:41,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:41,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:14:41,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986530959] [2020-10-11 13:14:41,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:14:41,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:41,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:14:41,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:14:41,810 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-11 13:14:42,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:42,200 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-11 13:14:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:14:42,201 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:14:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:42,201 INFO L225 Difference]: With dead ends: 106 [2020-10-11 13:14:42,202 INFO L226 Difference]: Without dead ends: 100 [2020-10-11 13:14:42,202 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:14:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-11 13:14:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-11 13:14:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:14:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-11 13:14:42,205 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-11 13:14:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:42,205 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-11 13:14:42,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:14:42,205 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-11 13:14:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:42,206 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:42,206 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:42,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-11 13:14:42,409 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:42,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:42,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-11 13:14:42,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:42,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819065052] [2020-10-11 13:14:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:42,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819065052] [2020-10-11 13:14:42,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064026439] [2020-10-11 13:14:42,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:42,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:42,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:42,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:42,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:14:42,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117519418] [2020-10-11 13:14:42,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:42,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:42,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:42,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:42,677 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-11 13:14:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:43,107 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-11 13:14:43,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:43,107 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:14:43,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:43,108 INFO L225 Difference]: With dead ends: 107 [2020-10-11 13:14:43,108 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:14:43,108 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:14:43,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:14:43,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-11 13:14:43,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-11 13:14:43,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-11 13:14:43,111 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-11 13:14:43,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:43,111 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-11 13:14:43,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:43,112 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-11 13:14:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:43,112 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:43,112 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:43,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-11 13:14:43,321 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:43,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:43,321 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-11 13:14:43,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:43,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45344673] [2020-10-11 13:14:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:43,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45344673] [2020-10-11 13:14:43,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188968992] [2020-10-11 13:14:43,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:43,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:43,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:43,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:43,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:43,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:43,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:43,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:14:43,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263687118] [2020-10-11 13:14:43,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:14:43,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:43,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:14:43,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:14:43,627 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-11 13:14:44,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:44,109 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-11 13:14:44,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:14:44,110 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:14:44,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:44,110 INFO L225 Difference]: With dead ends: 119 [2020-10-11 13:14:44,110 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 13:14:44,111 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:14:44,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 13:14:44,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-11 13:14:44,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 13:14:44,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-11 13:14:44,112 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-11 13:14:44,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:44,112 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-11 13:14:44,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:14:44,112 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-11 13:14:44,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:44,113 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:44,113 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:44,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-11 13:14:44,314 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:44,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:44,314 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-11 13:14:44,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:44,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640536875] [2020-10-11 13:14:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:44,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640536875] [2020-10-11 13:14:44,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666839531] [2020-10-11 13:14:44,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:44,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 13:14:44,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:44,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:44,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:44,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:44,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:14:44,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317759321] [2020-10-11 13:14:44,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:44,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:44,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:44,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:44,569 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-11 13:14:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:45,049 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-11 13:14:45,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:14:45,049 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:14:45,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:45,050 INFO L225 Difference]: With dead ends: 119 [2020-10-11 13:14:45,050 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 13:14:45,051 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:14:45,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 13:14:45,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-11 13:14:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:45,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-11 13:14:45,052 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-11 13:14:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:45,052 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-11 13:14:45,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:45,053 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-11 13:14:45,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:45,053 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:45,053 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:45,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:45,256 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:45,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:45,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-11 13:14:45,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:45,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445358983] [2020-10-11 13:14:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:45,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445358983] [2020-10-11 13:14:45,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278021050] [2020-10-11 13:14:45,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:45,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:45,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:45,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:45,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:45,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:45,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:45,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:14:45,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682507265] [2020-10-11 13:14:45,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:14:45,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:45,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:14:45,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:14:45,543 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-11 13:14:46,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:46,117 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-11 13:14:46,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:14:46,118 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:14:46,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:46,119 INFO L225 Difference]: With dead ends: 116 [2020-10-11 13:14:46,119 INFO L226 Difference]: Without dead ends: 110 [2020-10-11 13:14:46,119 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:14:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-11 13:14:46,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-11 13:14:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-11 13:14:46,121 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-11 13:14:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:46,122 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-11 13:14:46,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:14:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-11 13:14:46,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:46,122 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:46,122 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:46,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:46,323 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:46,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:46,324 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-11 13:14:46,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:46,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899327387] [2020-10-11 13:14:46,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:46,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899327387] [2020-10-11 13:14:46,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80741803] [2020-10-11 13:14:46,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:46,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:14:46,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:46,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:46,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:46,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:46,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:14:46,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634757959] [2020-10-11 13:14:46,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:46,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:46,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:46,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:46,584 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-11 13:14:47,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:47,103 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-11 13:14:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:47,103 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:14:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:47,104 INFO L225 Difference]: With dead ends: 117 [2020-10-11 13:14:47,104 INFO L226 Difference]: Without dead ends: 111 [2020-10-11 13:14:47,105 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:14:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-11 13:14:47,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-11 13:14:47,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-11 13:14:47,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-11 13:14:47,107 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-11 13:14:47,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:47,107 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-11 13:14:47,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:47,107 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-11 13:14:47,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:47,107 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:47,108 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:47,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:47,308 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:47,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-11 13:14:47,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:47,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47938191] [2020-10-11 13:14:47,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:47,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47938191] [2020-10-11 13:14:47,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652541845] [2020-10-11 13:14:47,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:47,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:14:47,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:47,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:47,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:47,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:47,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:47,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:14:47,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266638496] [2020-10-11 13:14:47,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:14:47,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:47,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:14:47,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:14:47,646 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-11 13:14:48,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:48,313 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-11 13:14:48,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:14:48,314 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:14:48,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:48,314 INFO L225 Difference]: With dead ends: 114 [2020-10-11 13:14:48,314 INFO L226 Difference]: Without dead ends: 108 [2020-10-11 13:14:48,315 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:14:48,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-11 13:14:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-11 13:14:48,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:14:48,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-11 13:14:48,317 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-11 13:14:48,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:48,317 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-11 13:14:48,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:14:48,317 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-11 13:14:48,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:48,318 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:48,318 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:48,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-11 13:14:48,521 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:48,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:48,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-11 13:14:48,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:48,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633758123] [2020-10-11 13:14:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:48,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633758123] [2020-10-11 13:14:48,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267268045] [2020-10-11 13:14:48,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:48,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:48,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:48,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:48,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:14:48,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009893740] [2020-10-11 13:14:48,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:48,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:48,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:48,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:48,777 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-11 13:14:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:49,381 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-11 13:14:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:14:49,382 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:14:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:49,382 INFO L225 Difference]: With dead ends: 115 [2020-10-11 13:14:49,382 INFO L226 Difference]: Without dead ends: 109 [2020-10-11 13:14:49,383 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:14:49,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-11 13:14:49,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-11 13:14:49,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-11 13:14:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-11 13:14:49,385 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-11 13:14:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:49,385 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-11 13:14:49,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-11 13:14:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:49,386 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:49,386 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:49,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:49,593 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:49,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-11 13:14:49,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:49,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040134705] [2020-10-11 13:14:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:49,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040134705] [2020-10-11 13:14:49,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882427084] [2020-10-11 13:14:49,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:49,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:49,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:49,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:49,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:49,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:49,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:49,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:14:49,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535153389] [2020-10-11 13:14:49,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:14:49,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:49,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:14:49,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:14:49,870 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-11 13:14:50,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:50,627 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-11 13:14:50,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:14:50,628 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:14:50,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:50,628 INFO L225 Difference]: With dead ends: 112 [2020-10-11 13:14:50,628 INFO L226 Difference]: Without dead ends: 106 [2020-10-11 13:14:50,629 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:14:50,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-11 13:14:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-11 13:14:50,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-11 13:14:50,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-11 13:14:50,631 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-11 13:14:50,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:50,631 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-11 13:14:50,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:14:50,631 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-11 13:14:50,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:50,632 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:50,632 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:50,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-11 13:14:50,832 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:50,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:50,833 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-11 13:14:50,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:50,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160396942] [2020-10-11 13:14:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:51,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160396942] [2020-10-11 13:14:51,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015893266] [2020-10-11 13:14:51,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:51,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 13:14:51,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:51,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:51,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:51,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:51,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:14:51,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857316015] [2020-10-11 13:14:51,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:51,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:51,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:51,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:51,082 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-11 13:14:51,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:51,736 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-11 13:14:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:14:51,737 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:14:51,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:51,738 INFO L225 Difference]: With dead ends: 113 [2020-10-11 13:14:51,738 INFO L226 Difference]: Without dead ends: 107 [2020-10-11 13:14:51,738 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 13:14:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-11 13:14:51,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-11 13:14:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:14:51,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:14:51,740 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-11 13:14:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:51,740 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:14:51,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:51,741 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:14:51,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:51,741 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:51,741 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:51,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-11 13:14:51,942 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:51,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:51,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-11 13:14:51,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:51,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278443213] [2020-10-11 13:14:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:52,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278443213] [2020-10-11 13:14:52,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018021500] [2020-10-11 13:14:52,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:52,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:52,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:52,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:52,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:52,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:52,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:52,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:14:52,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179085850] [2020-10-11 13:14:52,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:14:52,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:52,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:14:52,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:14:52,193 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-11 13:14:52,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:52,993 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-11 13:14:52,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:14:52,994 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:14:52,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:52,995 INFO L225 Difference]: With dead ends: 110 [2020-10-11 13:14:52,995 INFO L226 Difference]: Without dead ends: 104 [2020-10-11 13:14:52,995 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:14:52,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-11 13:14:52,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-11 13:14:52,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:14:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:14:52,998 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-11 13:14:52,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:52,998 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:14:52,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:14:52,998 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:14:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:52,998 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:52,998 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:53,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-11 13:14:53,199 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:53,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:53,200 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-11 13:14:53,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:53,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113761075] [2020-10-11 13:14:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:53,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113761075] [2020-10-11 13:14:53,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142832038] [2020-10-11 13:14:53,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:53,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:14:53,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:53,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:53,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:53,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:53,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:14:53,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600651380] [2020-10-11 13:14:53,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:53,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:53,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:53,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:53,444 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-11 13:14:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:54,265 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-11 13:14:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:14:54,265 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:14:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:54,266 INFO L225 Difference]: With dead ends: 111 [2020-10-11 13:14:54,266 INFO L226 Difference]: Without dead ends: 105 [2020-10-11 13:14:54,266 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:14:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-11 13:14:54,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-11 13:14:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-11 13:14:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-11 13:14:54,268 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-11 13:14:54,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:54,269 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-11 13:14:54,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:54,269 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-11 13:14:54,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:54,269 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:54,269 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:54,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:54,470 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:54,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:54,471 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-11 13:14:54,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:54,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928584701] [2020-10-11 13:14:54,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:54,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928584701] [2020-10-11 13:14:54,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449982993] [2020-10-11 13:14:54,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:54,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:14:54,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:54,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:54,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:54,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:54,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:54,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:14:54,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854582106] [2020-10-11 13:14:54,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:14:54,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:54,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:14:54,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:14:54,735 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-11 13:14:55,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:55,664 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-11 13:14:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:14:55,664 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:14:55,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:55,665 INFO L225 Difference]: With dead ends: 108 [2020-10-11 13:14:55,665 INFO L226 Difference]: Without dead ends: 102 [2020-10-11 13:14:55,666 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:14:55,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-11 13:14:55,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-11 13:14:55,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 13:14:55,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-11 13:14:55,668 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-11 13:14:55,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:55,668 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-11 13:14:55,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:14:55,668 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-11 13:14:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:55,668 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:55,668 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:55,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-11 13:14:55,869 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:55,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:55,870 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-11 13:14:55,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:55,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514435150] [2020-10-11 13:14:55,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:56,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514435150] [2020-10-11 13:14:56,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401202478] [2020-10-11 13:14:56,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:56,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:56,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:56,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:56,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:14:56,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752037174] [2020-10-11 13:14:56,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:14:56,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:56,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:14:56,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:14:56,105 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-11 13:14:56,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:56,849 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-11 13:14:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:14:56,850 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:14:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:56,850 INFO L225 Difference]: With dead ends: 128 [2020-10-11 13:14:56,850 INFO L226 Difference]: Without dead ends: 122 [2020-10-11 13:14:56,851 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:14:56,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-11 13:14:56,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-11 13:14:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 13:14:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-11 13:14:56,852 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-11 13:14:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:56,853 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-11 13:14:56,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:14:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-11 13:14:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:14:56,853 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:56,853 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:57,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:57,061 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:57,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:57,061 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-11 13:14:57,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:57,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909917685] [2020-10-11 13:14:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:57,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909917685] [2020-10-11 13:14:57,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790879115] [2020-10-11 13:14:57,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:57,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:57,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:57,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:14:57,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:57,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:57,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:57,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:14:57,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815172635] [2020-10-11 13:14:57,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:14:57,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:57,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:14:57,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:14:57,310 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-11 13:14:58,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:58,244 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-11 13:14:58,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:14:58,244 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:14:58,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:58,245 INFO L225 Difference]: With dead ends: 109 [2020-10-11 13:14:58,245 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:14:58,245 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:14:58,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:14:58,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-11 13:14:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-11 13:14:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-11 13:14:58,247 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-11 13:14:58,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:58,248 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-11 13:14:58,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:14:58,248 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-11 13:14:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:14:58,248 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:58,248 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:58,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:58,451 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:58,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:58,451 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-11 13:14:58,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:58,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301022113] [2020-10-11 13:14:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:58,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301022113] [2020-10-11 13:14:58,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664614302] [2020-10-11 13:14:58,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:58,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 13:14:58,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:58,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:14:58,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:58,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:58,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:14:58,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42354024] [2020-10-11 13:14:58,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:14:58,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:58,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:14:58,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:14:58,770 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-11 13:14:59,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:59,186 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-11 13:14:59,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:14:59,186 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:14:59,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:59,187 INFO L225 Difference]: With dead ends: 124 [2020-10-11 13:14:59,187 INFO L226 Difference]: Without dead ends: 118 [2020-10-11 13:14:59,188 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:14:59,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-11 13:14:59,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-11 13:14:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:14:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:14:59,190 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:14:59,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:59,190 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:14:59,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:14:59,190 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:14:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:14:59,190 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:59,191 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:59,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:59,393 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:59,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:59,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-11 13:14:59,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:59,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885527192] [2020-10-11 13:14:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:59,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885527192] [2020-10-11 13:14:59,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871681777] [2020-10-11 13:14:59,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:59,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:59,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:59,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:14:59,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:59,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:59,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:59,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:14:59,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894353036] [2020-10-11 13:14:59,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:14:59,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:59,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:14:59,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:14:59,740 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:00,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:00,291 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-11 13:15:00,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:15:00,292 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:00,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:00,293 INFO L225 Difference]: With dead ends: 121 [2020-10-11 13:15:00,293 INFO L226 Difference]: Without dead ends: 115 [2020-10-11 13:15:00,293 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:15:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-11 13:15:00,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-11 13:15:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:00,295 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:00,296 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:00,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:00,296 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:00,296 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:00,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:00,497 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:00,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-11 13:15:00,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:00,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481056462] [2020-10-11 13:15:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:00,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481056462] [2020-10-11 13:15:00,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712573049] [2020-10-11 13:15:00,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:00,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:15:00,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:00,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:00,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:00,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:00,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:00,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595256606] [2020-10-11 13:15:00,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:00,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:00,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:00,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:00,801 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:01,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:01,284 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-11 13:15:01,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:15:01,285 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:01,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:01,286 INFO L225 Difference]: With dead ends: 118 [2020-10-11 13:15:01,286 INFO L226 Difference]: Without dead ends: 112 [2020-10-11 13:15:01,286 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:15:01,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-11 13:15:01,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-11 13:15:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:01,288 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:01,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:01,289 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:01,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:01,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:01,289 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:01,289 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:01,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:01,490 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:01,491 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-11 13:15:01,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:01,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3003175] [2020-10-11 13:15:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:01,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3003175] [2020-10-11 13:15:01,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873753297] [2020-10-11 13:15:01,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:01,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:15:01,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:01,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:01,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:01,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:01,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:01,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:01,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257868956] [2020-10-11 13:15:01,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:01,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:01,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:01,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:01,808 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:02,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:02,407 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-11 13:15:02,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:15:02,408 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:02,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:02,409 INFO L225 Difference]: With dead ends: 117 [2020-10-11 13:15:02,409 INFO L226 Difference]: Without dead ends: 111 [2020-10-11 13:15:02,409 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:15:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-11 13:15:02,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-11 13:15:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:02,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:02,411 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:02,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:02,412 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:02,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:02,412 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:02,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:02,412 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:02,412 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:02,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-11 13:15:02,613 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:02,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:02,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-11 13:15:02,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:02,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617695383] [2020-10-11 13:15:02,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:02,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617695383] [2020-10-11 13:15:02,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693875572] [2020-10-11 13:15:02,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:02,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:02,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:02,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:02,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:02,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495149465] [2020-10-11 13:15:02,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:02,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:02,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:02,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:02,902 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:03,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:03,444 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-11 13:15:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:15:03,445 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:03,446 INFO L225 Difference]: With dead ends: 114 [2020-10-11 13:15:03,446 INFO L226 Difference]: Without dead ends: 108 [2020-10-11 13:15:03,446 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:15:03,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-11 13:15:03,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-11 13:15:03,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:03,449 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:03,449 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:03,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:03,449 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:03,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:03,449 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:03,450 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:03,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-11 13:15:03,653 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:03,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:03,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-11 13:15:03,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:03,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623072367] [2020-10-11 13:15:03,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:03,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623072367] [2020-10-11 13:15:03,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282239422] [2020-10-11 13:15:03,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:03,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:03,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:03,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:03,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:03,951 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:03,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:03,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:03,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089129783] [2020-10-11 13:15:03,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:03,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:03,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:03,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:03,964 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:04,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:04,649 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-11 13:15:04,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:15:04,650 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:04,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:04,650 INFO L225 Difference]: With dead ends: 113 [2020-10-11 13:15:04,651 INFO L226 Difference]: Without dead ends: 107 [2020-10-11 13:15:04,651 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:15:04,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-11 13:15:04,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-11 13:15:04,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:04,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:04,653 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:04,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:04,654 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:04,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:04,654 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:04,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:04,654 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:04,654 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:04,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-11 13:15:04,861 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:04,861 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-11 13:15:04,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:04,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214470895] [2020-10-11 13:15:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:05,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214470895] [2020-10-11 13:15:05,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216651191] [2020-10-11 13:15:05,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:05,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 13:15:05,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:05,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:05,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:05,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:05,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:05,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817287677] [2020-10-11 13:15:05,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:05,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:05,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:05,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:05,154 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:05,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:05,763 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-11 13:15:05,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:15:05,764 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:05,765 INFO L225 Difference]: With dead ends: 110 [2020-10-11 13:15:05,765 INFO L226 Difference]: Without dead ends: 104 [2020-10-11 13:15:05,765 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:15:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-11 13:15:05,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-11 13:15:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:05,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:05,767 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:05,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:05,767 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:05,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:05,767 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:05,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:05,768 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:05,768 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:05,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-11 13:15:05,968 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:05,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-11 13:15:05,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:05,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567480950] [2020-10-11 13:15:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:06,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567480950] [2020-10-11 13:15:06,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146418353] [2020-10-11 13:15:06,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:06,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:06,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:06,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:06,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:06,254 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:06,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:06,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:06,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930450403] [2020-10-11 13:15:06,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:06,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:06,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:06,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:06,273 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:07,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:07,065 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-11 13:15:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:15:07,065 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:07,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:07,066 INFO L225 Difference]: With dead ends: 109 [2020-10-11 13:15:07,066 INFO L226 Difference]: Without dead ends: 103 [2020-10-11 13:15:07,067 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 13:15:07,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-11 13:15:07,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-11 13:15:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:07,069 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:07,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:07,069 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:07,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:07,069 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:07,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:07,069 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:07,070 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:07,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:07,270 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:07,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:07,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-11 13:15:07,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:07,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717834773] [2020-10-11 13:15:07,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:07,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717834773] [2020-10-11 13:15:07,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907504670] [2020-10-11 13:15:07,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:07,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:15:07,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:07,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:07,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:07,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:07,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:07,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995233624] [2020-10-11 13:15:07,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:07,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:07,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:07,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:07,548 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:08,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:08,231 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-11 13:15:08,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:15:08,232 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:08,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:08,233 INFO L225 Difference]: With dead ends: 106 [2020-10-11 13:15:08,233 INFO L226 Difference]: Without dead ends: 100 [2020-10-11 13:15:08,233 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:15:08,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-11 13:15:08,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-11 13:15:08,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:08,236 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:08,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:08,236 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:08,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:08,236 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:08,236 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:08,237 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:08,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-11 13:15:08,437 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:08,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:08,438 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-11 13:15:08,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:08,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775071305] [2020-10-11 13:15:08,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:08,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775071305] [2020-10-11 13:15:08,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765979329] [2020-10-11 13:15:08,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:08,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:15:08,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:08,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:08,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:08,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:08,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:08,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:08,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956463475] [2020-10-11 13:15:08,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:08,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:08,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:08,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:08,733 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:09,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:09,602 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-11 13:15:09,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:15:09,603 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:09,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:09,603 INFO L225 Difference]: With dead ends: 105 [2020-10-11 13:15:09,603 INFO L226 Difference]: Without dead ends: 99 [2020-10-11 13:15:09,604 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:15:09,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-11 13:15:09,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-11 13:15:09,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:09,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:09,605 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:09,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:09,606 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:09,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:09,606 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:09,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:09,606 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:09,606 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:09,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:09,807 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:09,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:09,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-11 13:15:09,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:09,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915481858] [2020-10-11 13:15:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:10,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915481858] [2020-10-11 13:15:10,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79509685] [2020-10-11 13:15:10,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:10,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:10,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:10,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:10,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:10,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344110623] [2020-10-11 13:15:10,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:10,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:10,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:10,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:10,096 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:10,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:10,824 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-11 13:15:10,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:15:10,825 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:10,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:10,826 INFO L225 Difference]: With dead ends: 102 [2020-10-11 13:15:10,826 INFO L226 Difference]: Without dead ends: 96 [2020-10-11 13:15:10,826 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:15:10,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-11 13:15:10,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-11 13:15:10,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:10,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:10,828 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:10,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:10,828 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:10,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:10,828 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:10,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:10,829 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:10,829 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:11,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:11,030 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:11,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:11,030 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-11 13:15:11,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:11,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077259718] [2020-10-11 13:15:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:11,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077259718] [2020-10-11 13:15:11,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115175863] [2020-10-11 13:15:11,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:11,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:11,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:11,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:11,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:11,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:11,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:11,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:11,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586680726] [2020-10-11 13:15:11,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:11,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:11,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:11,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:11,310 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:12,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:12,270 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-11 13:15:12,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:15:12,270 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:12,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:12,270 INFO L225 Difference]: With dead ends: 101 [2020-10-11 13:15:12,271 INFO L226 Difference]: Without dead ends: 95 [2020-10-11 13:15:12,271 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:15:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-11 13:15:12,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-11 13:15:12,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:12,273 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:12,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:12,273 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:12,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:12,273 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:12,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:12,274 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:12,274 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:12,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-11 13:15:12,479 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:12,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:12,479 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-11 13:15:12,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:12,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487624397] [2020-10-11 13:15:12,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:12,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487624397] [2020-10-11 13:15:12,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39502001] [2020-10-11 13:15:12,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:12,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 13:15:12,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:12,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:12,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:12,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:12,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:12,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748968366] [2020-10-11 13:15:12,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:12,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:12,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:12,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:12,729 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:13,516 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-11 13:15:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:15:13,517 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:13,517 INFO L225 Difference]: With dead ends: 98 [2020-10-11 13:15:13,517 INFO L226 Difference]: Without dead ends: 92 [2020-10-11 13:15:13,518 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:15:13,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-11 13:15:13,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-11 13:15:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:13,520 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:13,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:13,520 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:13,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:13,521 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:13,521 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:13,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:13,722 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:13,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:13,722 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-11 13:15:13,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:13,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364567896] [2020-10-11 13:15:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:13,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364567896] [2020-10-11 13:15:13,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698294450] [2020-10-11 13:15:13,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:13,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:13,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:13,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:13,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:14,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:14,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:14,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:14,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553367447] [2020-10-11 13:15:14,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:14,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:14,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:14,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:14,017 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:15,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:15,090 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-11 13:15:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:15:15,091 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:15,091 INFO L225 Difference]: With dead ends: 97 [2020-10-11 13:15:15,092 INFO L226 Difference]: Without dead ends: 91 [2020-10-11 13:15:15,092 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:15:15,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-11 13:15:15,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-11 13:15:15,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:15,094 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:15,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:15,094 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:15,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:15,094 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:15,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:15,095 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:15,095 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:15,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-11 13:15:15,296 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:15,296 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-11 13:15:15,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:15,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234295508] [2020-10-11 13:15:15,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:15,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234295508] [2020-10-11 13:15:15,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613595065] [2020-10-11 13:15:15,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:15,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:15:15,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:15,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:15,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:15,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:15,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:15,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124992119] [2020-10-11 13:15:15,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:15,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:15,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:15,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:15,557 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:16,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:16,398 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-11 13:15:16,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:15:16,399 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:16,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:16,400 INFO L225 Difference]: With dead ends: 113 [2020-10-11 13:15:16,400 INFO L226 Difference]: Without dead ends: 107 [2020-10-11 13:15:16,400 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:15:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-11 13:15:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-11 13:15:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-11 13:15:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-11 13:15:16,402 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-11 13:15:16,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:16,403 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-11 13:15:16,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:16,403 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-11 13:15:16,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:16,403 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:16,403 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:16,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-11 13:15:16,604 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:16,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:16,604 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-11 13:15:16,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:16,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077258048] [2020-10-11 13:15:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:16,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077258048] [2020-10-11 13:15:16,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952378607] [2020-10-11 13:15:16,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:16,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:15:16,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:16,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:16,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:16,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:16,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:16,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:16,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049501303] [2020-10-11 13:15:16,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:16,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:16,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:16,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:16,883 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-11 13:15:17,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:17,992 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-11 13:15:17,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:15:17,993 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:17,993 INFO L225 Difference]: With dead ends: 94 [2020-10-11 13:15:17,993 INFO L226 Difference]: Without dead ends: 86 [2020-10-11 13:15:17,993 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:15:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-11 13:15:17,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-11 13:15:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-11 13:15:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-11 13:15:17,995 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-11 13:15:17,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:17,995 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-11 13:15:17,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:17,996 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-11 13:15:17,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:17,996 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:17,996 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:18,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-11 13:15:18,197 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:18,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-11 13:15:18,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:18,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682188717] [2020-10-11 13:15:18,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:18,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682188717] [2020-10-11 13:15:18,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482670430] [2020-10-11 13:15:18,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:18,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:18,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:18,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:15:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:18,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:18,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:18,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052878651] [2020-10-11 13:15:18,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:18,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:18,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:18,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:18,475 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-11 13:15:19,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:19,484 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-11 13:15:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:15:19,484 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:19,485 INFO L225 Difference]: With dead ends: 108 [2020-10-11 13:15:19,485 INFO L226 Difference]: Without dead ends: 103 [2020-10-11 13:15:19,485 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:15:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-11 13:15:19,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-11 13:15:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 13:15:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-11 13:15:19,487 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-11 13:15:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:19,488 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-11 13:15:19,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-11 13:15:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:19,488 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:19,488 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:19,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-11 13:15:19,689 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:19,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:19,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-11 13:15:19,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:19,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091004988] [2020-10-11 13:15:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:19,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091004988] [2020-10-11 13:15:19,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121332430] [2020-10-11 13:15:19,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:19,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:19,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:19,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:19,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:19,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:15:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:20,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:20,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:20,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839957183] [2020-10-11 13:15:20,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:20,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:20,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:20,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:20,005 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-11 13:15:21,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:21,113 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-11 13:15:21,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:15:21,114 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:21,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:21,115 INFO L225 Difference]: With dead ends: 90 [2020-10-11 13:15:21,115 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 13:15:21,116 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:15:21,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 13:15:21,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-11 13:15:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:15:21,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-11 13:15:21,118 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-11 13:15:21,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:21,118 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-11 13:15:21,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:21,118 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-11 13:15:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:21,118 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:21,118 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:21,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:21,319 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:21,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:21,319 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-11 13:15:21,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:21,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141476001] [2020-10-11 13:15:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:21,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141476001] [2020-10-11 13:15:21,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913641411] [2020-10-11 13:15:21,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:21,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:15:21,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:21,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:21,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:21,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:21,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:15:21,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177626103] [2020-10-11 13:15:21,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:21,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:21,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:21,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:21,671 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-11 13:15:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:22,133 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-11 13:15:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:15:22,134 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:15:22,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:22,135 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:15:22,135 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 13:15:22,135 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 13:15:22,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 13:15:22,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-11 13:15:22,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:15:22,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-11 13:15:22,137 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-11 13:15:22,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:22,137 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-11 13:15:22,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:22,137 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-11 13:15:22,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:22,138 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:22,138 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:22,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:22,338 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:22,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:22,339 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-11 13:15:22,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:22,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564049278] [2020-10-11 13:15:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:22,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564049278] [2020-10-11 13:15:22,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517277023] [2020-10-11 13:15:22,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:22,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:22,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:22,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:22,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:22,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:22,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:22,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:22,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250071120] [2020-10-11 13:15:22,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:22,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:22,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:22,703 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-11 13:15:23,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:23,176 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-11 13:15:23,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:15:23,177 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:23,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:23,177 INFO L225 Difference]: With dead ends: 114 [2020-10-11 13:15:23,177 INFO L226 Difference]: Without dead ends: 108 [2020-10-11 13:15:23,177 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:15:23,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-11 13:15:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-11 13:15:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:15:23,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-11 13:15:23,179 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-11 13:15:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:23,180 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-11 13:15:23,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-11 13:15:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:23,180 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:23,180 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:23,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:23,381 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:23,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:23,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-11 13:15:23,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:23,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397212746] [2020-10-11 13:15:23,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:23,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397212746] [2020-10-11 13:15:23,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178765365] [2020-10-11 13:15:23,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:23,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:15:23,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:23,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:23,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:23,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:23,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:15:23,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620464143] [2020-10-11 13:15:23,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:23,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:23,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:23,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:23,717 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-11 13:15:24,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:24,261 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-11 13:15:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:15:24,262 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:15:24,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:24,262 INFO L225 Difference]: With dead ends: 115 [2020-10-11 13:15:24,263 INFO L226 Difference]: Without dead ends: 109 [2020-10-11 13:15:24,263 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:15:24,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-11 13:15:24,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-11 13:15:24,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-11 13:15:24,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-11 13:15:24,265 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-11 13:15:24,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:24,265 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-11 13:15:24,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:24,265 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-11 13:15:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:24,265 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:24,265 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:24,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:24,466 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:24,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:24,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-11 13:15:24,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:24,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211868172] [2020-10-11 13:15:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:24,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211868172] [2020-10-11 13:15:24,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654681415] [2020-10-11 13:15:24,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:24,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:15:24,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:24,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:24,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:24,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:24,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:24,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:24,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288756171] [2020-10-11 13:15:24,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:24,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:24,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:24,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:24,850 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-11 13:15:25,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:25,443 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-11 13:15:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:15:25,443 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:25,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:25,444 INFO L225 Difference]: With dead ends: 129 [2020-10-11 13:15:25,444 INFO L226 Difference]: Without dead ends: 123 [2020-10-11 13:15:25,444 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:15:25,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-11 13:15:25,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-11 13:15:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:15:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-11 13:15:25,446 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-11 13:15:25,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:25,447 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-11 13:15:25,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:25,447 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-11 13:15:25,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:25,447 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:25,447 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:25,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:25,650 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:25,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:25,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-11 13:15:25,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:25,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810538955] [2020-10-11 13:15:25,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:25,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810538955] [2020-10-11 13:15:25,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978748018] [2020-10-11 13:15:25,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:25,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:25,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:25,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:25,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:15:25,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408812099] [2020-10-11 13:15:25,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:25,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:25,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:25,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:25,999 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-11 13:15:26,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:26,610 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-11 13:15:26,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:15:26,610 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:15:26,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:26,611 INFO L225 Difference]: With dead ends: 129 [2020-10-11 13:15:26,611 INFO L226 Difference]: Without dead ends: 123 [2020-10-11 13:15:26,611 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:15:26,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-11 13:15:26,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-11 13:15:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-11 13:15:26,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-11 13:15:26,612 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-11 13:15:26,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:26,613 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-11 13:15:26,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:26,613 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-11 13:15:26,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:26,613 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:26,613 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:26,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:26,814 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:26,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:26,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-11 13:15:26,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:26,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946053527] [2020-10-11 13:15:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:27,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946053527] [2020-10-11 13:15:27,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484636952] [2020-10-11 13:15:27,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:27,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:27,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:27,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:27,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:27,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:27,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:27,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:27,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615898010] [2020-10-11 13:15:27,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:27,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:27,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:27,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:27,164 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-11 13:15:27,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:27,849 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-11 13:15:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:15:27,850 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:27,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:27,850 INFO L225 Difference]: With dead ends: 126 [2020-10-11 13:15:27,850 INFO L226 Difference]: Without dead ends: 120 [2020-10-11 13:15:27,851 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:15:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-11 13:15:27,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-11 13:15:27,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-11 13:15:27,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-11 13:15:27,853 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-11 13:15:27,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:27,853 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-11 13:15:27,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:27,853 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-11 13:15:27,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:27,854 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:27,854 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:28,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:28,054 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:28,055 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-11 13:15:28,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:28,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414350476] [2020-10-11 13:15:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:28,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414350476] [2020-10-11 13:15:28,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973532752] [2020-10-11 13:15:28,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:28,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:15:28,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:28,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:28,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:28,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:28,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:15:28,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893136083] [2020-10-11 13:15:28,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:28,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:28,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:28,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:28,368 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-11 13:15:29,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:29,023 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-11 13:15:29,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:15:29,024 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:15:29,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:29,024 INFO L225 Difference]: With dead ends: 127 [2020-10-11 13:15:29,024 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 13:15:29,024 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 13:15:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 13:15:29,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-11 13:15:29,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:15:29,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-11 13:15:29,027 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-11 13:15:29,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:29,027 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-11 13:15:29,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:29,027 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-11 13:15:29,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:29,027 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:29,027 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:29,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-11 13:15:29,230 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:29,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:29,230 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-11 13:15:29,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:29,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440179569] [2020-10-11 13:15:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:29,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440179569] [2020-10-11 13:15:29,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104994878] [2020-10-11 13:15:29,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:29,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:29,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:29,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:29,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:29,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:29,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:29,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:29,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498172897] [2020-10-11 13:15:29,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:29,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:29,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:29,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:29,568 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-11 13:15:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:30,344 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-11 13:15:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:15:30,345 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:30,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:30,346 INFO L225 Difference]: With dead ends: 124 [2020-10-11 13:15:30,346 INFO L226 Difference]: Without dead ends: 118 [2020-10-11 13:15:30,346 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:15:30,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-11 13:15:30,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-11 13:15:30,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:15:30,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-11 13:15:30,348 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-11 13:15:30,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:30,348 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-11 13:15:30,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:30,349 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-11 13:15:30,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:30,349 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:30,349 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:30,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-11 13:15:30,550 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:30,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:30,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-11 13:15:30,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:30,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956559720] [2020-10-11 13:15:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:30,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956559720] [2020-10-11 13:15:30,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159150999] [2020-10-11 13:15:30,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:30,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:15:30,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:30,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:30,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:30,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:30,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:15:30,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436283359] [2020-10-11 13:15:30,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:30,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:30,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:30,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:30,874 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-11 13:15:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:31,598 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-11 13:15:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:15:31,599 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:15:31,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:31,600 INFO L225 Difference]: With dead ends: 125 [2020-10-11 13:15:31,600 INFO L226 Difference]: Without dead ends: 119 [2020-10-11 13:15:31,600 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:15:31,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-11 13:15:31,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-11 13:15:31,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-11 13:15:31,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-11 13:15:31,602 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-11 13:15:31,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:31,602 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-11 13:15:31,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:31,602 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-11 13:15:31,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:31,603 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:31,603 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:31,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-11 13:15:31,803 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:31,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:31,804 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-11 13:15:31,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:31,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839236419] [2020-10-11 13:15:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:32,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839236419] [2020-10-11 13:15:32,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859005139] [2020-10-11 13:15:32,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:32,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:15:32,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:32,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:32,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:32,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:32,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:32,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:32,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783241471] [2020-10-11 13:15:32,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:32,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:32,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:32,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:32,132 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-11 13:15:32,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:32,993 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-11 13:15:32,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:15:32,994 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:32,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:32,994 INFO L225 Difference]: With dead ends: 122 [2020-10-11 13:15:32,994 INFO L226 Difference]: Without dead ends: 116 [2020-10-11 13:15:32,995 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:15:32,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-11 13:15:32,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-11 13:15:32,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 13:15:32,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-11 13:15:32,996 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-11 13:15:32,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:32,996 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-11 13:15:32,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:32,997 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-11 13:15:32,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:32,997 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:32,997 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:33,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-11 13:15:33,198 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:33,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:33,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-11 13:15:33,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:33,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609911122] [2020-10-11 13:15:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:33,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609911122] [2020-10-11 13:15:33,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236343950] [2020-10-11 13:15:33,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:33,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:33,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:33,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:33,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:15:33,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515968121] [2020-10-11 13:15:33,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:33,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:33,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:33,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:33,493 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-11 13:15:34,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:34,286 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-11 13:15:34,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:15:34,286 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:15:34,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:34,287 INFO L225 Difference]: With dead ends: 123 [2020-10-11 13:15:34,287 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 13:15:34,288 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:15:34,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 13:15:34,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-11 13:15:34,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-11 13:15:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-11 13:15:34,290 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-11 13:15:34,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:34,290 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-11 13:15:34,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-11 13:15:34,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:34,290 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:34,290 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:34,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:34,491 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:34,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:34,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-11 13:15:34,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:34,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664894845] [2020-10-11 13:15:34,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:34,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664894845] [2020-10-11 13:15:34,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511475082] [2020-10-11 13:15:34,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:34,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:34,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:34,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:34,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:34,804 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:34,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:34,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:34,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19901344] [2020-10-11 13:15:34,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:34,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:34,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:34,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:34,819 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-11 13:15:35,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:35,769 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-11 13:15:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:15:35,770 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:35,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:35,770 INFO L225 Difference]: With dead ends: 120 [2020-10-11 13:15:35,770 INFO L226 Difference]: Without dead ends: 114 [2020-10-11 13:15:35,770 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:15:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-11 13:15:35,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-11 13:15:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-11 13:15:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-11 13:15:35,774 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-11 13:15:35,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:35,774 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-11 13:15:35,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:35,774 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-11 13:15:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:35,775 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:35,775 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:35,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:35,976 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:35,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:35,976 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-11 13:15:35,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:35,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120032714] [2020-10-11 13:15:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:36,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120032714] [2020-10-11 13:15:36,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181524768] [2020-10-11 13:15:36,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:36,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:15:36,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:36,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:36,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:36,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:36,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:15:36,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909395449] [2020-10-11 13:15:36,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:36,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:36,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:36,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:36,267 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-11 13:15:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:37,129 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-11 13:15:37,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:15:37,129 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:15:37,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:37,130 INFO L225 Difference]: With dead ends: 121 [2020-10-11 13:15:37,130 INFO L226 Difference]: Without dead ends: 115 [2020-10-11 13:15:37,130 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:15:37,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-11 13:15:37,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-11 13:15:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:37,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:37,132 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-11 13:15:37,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:37,132 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:37,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:37,132 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:37,132 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:37,132 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:37,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-11 13:15:37,333 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:37,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:37,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-11 13:15:37,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:37,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012977306] [2020-10-11 13:15:37,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:37,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012977306] [2020-10-11 13:15:37,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292844566] [2020-10-11 13:15:37,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:37,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:37,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:37,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:37,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:37,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:37,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:37,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:37,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879081986] [2020-10-11 13:15:37,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:37,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:37,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:37,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:37,667 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-11 13:15:38,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:38,814 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-11 13:15:38,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:15:38,814 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:38,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:38,815 INFO L225 Difference]: With dead ends: 118 [2020-10-11 13:15:38,815 INFO L226 Difference]: Without dead ends: 112 [2020-10-11 13:15:38,815 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 13:15:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-11 13:15:38,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-11 13:15:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:38,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:38,817 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-11 13:15:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:38,818 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:38,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:38,818 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:38,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:38,818 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:38,818 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:39,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:39,019 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:39,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:39,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-11 13:15:39,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:39,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026155138] [2020-10-11 13:15:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:39,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026155138] [2020-10-11 13:15:39,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556789273] [2020-10-11 13:15:39,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:39,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:15:39,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:39,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:39,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:39,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:39,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:15:39,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441293083] [2020-10-11 13:15:39,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:39,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:39,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:39,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:39,317 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-11 13:15:40,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:40,235 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-11 13:15:40,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:15:40,236 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:15:40,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:40,236 INFO L225 Difference]: With dead ends: 119 [2020-10-11 13:15:40,236 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 13:15:40,237 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:15:40,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 13:15:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-11 13:15:40,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-11 13:15:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-11 13:15:40,239 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-11 13:15:40,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:40,239 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-11 13:15:40,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:40,239 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-11 13:15:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:40,239 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:40,240 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:40,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:40,447 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:40,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-11 13:15:40,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:40,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983470932] [2020-10-11 13:15:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:40,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983470932] [2020-10-11 13:15:40,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056492214] [2020-10-11 13:15:40,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:40,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:15:40,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:40,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:40,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:40,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:40,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:40,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:40,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293612498] [2020-10-11 13:15:40,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:40,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:40,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:40,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:40,768 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-11 13:15:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:41,925 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-11 13:15:41,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:15:41,926 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:41,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:41,926 INFO L225 Difference]: With dead ends: 116 [2020-10-11 13:15:41,926 INFO L226 Difference]: Without dead ends: 110 [2020-10-11 13:15:41,927 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:15:41,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-11 13:15:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-11 13:15:41,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 13:15:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-11 13:15:41,929 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-11 13:15:41,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:41,929 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-11 13:15:41,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-11 13:15:41,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:41,930 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:41,930 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:42,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:42,130 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:42,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:42,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-11 13:15:42,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:42,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024562821] [2020-10-11 13:15:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:42,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024562821] [2020-10-11 13:15:42,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815190514] [2020-10-11 13:15:42,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:42,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:42,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:42,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:42,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:15:42,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375688658] [2020-10-11 13:15:42,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:42,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:42,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:42,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:42,425 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-11 13:15:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:43,400 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-11 13:15:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:15:43,401 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:15:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:43,402 INFO L225 Difference]: With dead ends: 136 [2020-10-11 13:15:43,402 INFO L226 Difference]: Without dead ends: 130 [2020-10-11 13:15:43,402 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 13:15:43,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-11 13:15:43,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-11 13:15:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 13:15:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-11 13:15:43,405 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-11 13:15:43,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:43,405 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-11 13:15:43,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:43,405 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-11 13:15:43,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:43,406 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:43,406 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:43,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:43,615 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:43,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-11 13:15:43,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:43,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284510350] [2020-10-11 13:15:43,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:43,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284510350] [2020-10-11 13:15:43,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623483163] [2020-10-11 13:15:43,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:43,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:43,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:43,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:43,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:43,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:43,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:43,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:43,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565627869] [2020-10-11 13:15:43,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:43,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:43,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:43,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:43,926 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-11 13:15:45,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:45,096 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-11 13:15:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:15:45,096 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:45,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:45,097 INFO L225 Difference]: With dead ends: 117 [2020-10-11 13:15:45,097 INFO L226 Difference]: Without dead ends: 109 [2020-10-11 13:15:45,097 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:15:45,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-11 13:15:45,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-11 13:15:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-11 13:15:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-11 13:15:45,100 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-11 13:15:45,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:45,100 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-11 13:15:45,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:45,101 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-11 13:15:45,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:15:45,101 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:45,101 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:45,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:45,303 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:45,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:45,303 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-11 13:15:45,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:45,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010532881] [2020-10-11 13:15:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:45,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010532881] [2020-10-11 13:15:45,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564635547] [2020-10-11 13:15:45,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:45,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:15:45,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:45,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:15:45,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:45,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:45,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:15:45,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525081616] [2020-10-11 13:15:45,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:45,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:45,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:45,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:45,687 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-11 13:15:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:46,228 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-11 13:15:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:15:46,229 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:15:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:46,229 INFO L225 Difference]: With dead ends: 134 [2020-10-11 13:15:46,229 INFO L226 Difference]: Without dead ends: 128 [2020-10-11 13:15:46,230 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:15:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-11 13:15:46,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-11 13:15:46,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:15:46,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:15:46,232 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:15:46,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:46,232 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:15:46,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:46,232 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:15:46,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:15:46,233 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:46,233 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:46,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-11 13:15:46,434 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:46,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:46,434 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-11 13:15:46,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:46,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16602490] [2020-10-11 13:15:46,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:46,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16602490] [2020-10-11 13:15:46,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880801220] [2020-10-11 13:15:46,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:46,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:46,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:46,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:15:46,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:46,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:46,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:46,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:15:46,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828114185] [2020-10-11 13:15:46,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:15:46,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:46,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:15:46,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:15:46,845 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:15:47,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:47,500 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-11 13:15:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:15:47,500 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:15:47,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:47,501 INFO L225 Difference]: With dead ends: 131 [2020-10-11 13:15:47,501 INFO L226 Difference]: Without dead ends: 125 [2020-10-11 13:15:47,502 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:15:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-11 13:15:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-11 13:15:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:15:47,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:15:47,503 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:15:47,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:47,504 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:15:47,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:15:47,504 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:15:47,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:15:47,504 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:47,504 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:47,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-11 13:15:47,705 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:47,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:47,705 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-11 13:15:47,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:47,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665957521] [2020-10-11 13:15:47,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:48,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665957521] [2020-10-11 13:15:48,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324358587] [2020-10-11 13:15:48,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:48,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:15:48,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:48,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:15:48,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:48,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:48,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:15:48,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728951013] [2020-10-11 13:15:48,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:48,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:48,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:48,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:48,071 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:15:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:48,692 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-11 13:15:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:15:48,692 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:15:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:48,693 INFO L225 Difference]: With dead ends: 128 [2020-10-11 13:15:48,693 INFO L226 Difference]: Without dead ends: 122 [2020-10-11 13:15:48,694 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:15:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-11 13:15:48,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-11 13:15:48,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:15:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:15:48,696 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:15:48,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:48,696 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:15:48,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:48,696 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:15:48,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:15:48,697 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:48,697 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:48,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:48,898 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:48,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:48,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-11 13:15:48,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:48,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541212875] [2020-10-11 13:15:48,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:49,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541212875] [2020-10-11 13:15:49,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963825882] [2020-10-11 13:15:49,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:49,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:15:49,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:49,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:15:49,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:49,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:49,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:49,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:15:49,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317368010] [2020-10-11 13:15:49,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:15:49,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:49,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:15:49,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:15:49,296 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:15:50,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:50,042 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-11 13:15:50,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:15:50,043 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:15:50,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:50,044 INFO L225 Difference]: With dead ends: 127 [2020-10-11 13:15:50,044 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 13:15:50,044 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 13:15:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 13:15:50,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-11 13:15:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:15:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:15:50,047 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:15:50,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:50,047 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:15:50,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:15:50,047 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:15:50,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:15:50,047 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:50,047 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:50,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-11 13:15:50,248 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:50,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:50,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-11 13:15:50,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:50,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052968126] [2020-10-11 13:15:50,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:50,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052968126] [2020-10-11 13:15:50,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360629678] [2020-10-11 13:15:50,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:50,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:15:50,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:50,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:50,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:15:50,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035928235] [2020-10-11 13:15:50,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:50,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:50,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:50,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:50,614 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:15:51,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:51,305 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-11 13:15:51,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:15:51,306 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:15:51,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:51,306 INFO L225 Difference]: With dead ends: 124 [2020-10-11 13:15:51,306 INFO L226 Difference]: Without dead ends: 118 [2020-10-11 13:15:51,307 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:15:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-11 13:15:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-11 13:15:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:15:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:15:51,309 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:15:51,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:51,309 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:15:51,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:15:51,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:15:51,309 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:51,310 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:51,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:51,510 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:51,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:51,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-11 13:15:51,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:51,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492278116] [2020-10-11 13:15:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:51,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492278116] [2020-10-11 13:15:51,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540141537] [2020-10-11 13:15:51,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:51,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:51,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:51,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:15:51,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:51,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:51,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:51,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:15:51,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528659899] [2020-10-11 13:15:51,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:15:51,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:51,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:15:51,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:15:51,887 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:15:52,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:52,691 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-11 13:15:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:15:52,692 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:15:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:52,693 INFO L225 Difference]: With dead ends: 123 [2020-10-11 13:15:52,693 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 13:15:52,693 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:15:52,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 13:15:52,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-11 13:15:52,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:15:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:15:52,695 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:15:52,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:52,696 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:15:52,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:15:52,696 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:15:52,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:15:52,696 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:52,696 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:52,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:52,897 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:52,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-11 13:15:52,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:52,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126108525] [2020-10-11 13:15:52,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:53,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126108525] [2020-10-11 13:15:53,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309147153] [2020-10-11 13:15:53,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:53,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:15:53,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:53,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:15:53,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:53,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:53,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:15:53,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293946443] [2020-10-11 13:15:53,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:53,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:53,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:53,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:53,241 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:15:53,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:53,980 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-11 13:15:53,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:15:53,981 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:15:53,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:53,981 INFO L225 Difference]: With dead ends: 120 [2020-10-11 13:15:53,982 INFO L226 Difference]: Without dead ends: 114 [2020-10-11 13:15:53,982 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:15:53,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-11 13:15:53,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-11 13:15:53,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:15:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:15:53,984 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:15:53,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:53,985 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:15:53,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:15:53,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:15:53,985 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:53,985 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:54,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:54,186 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:54,186 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-11 13:15:54,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:54,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809341269] [2020-10-11 13:15:54,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:54,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809341269] [2020-10-11 13:15:54,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102958985] [2020-10-11 13:15:54,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:54,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:54,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:54,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:15:54,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:54,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:54,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:54,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:15:54,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351368956] [2020-10-11 13:15:54,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:15:54,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:54,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:15:54,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:15:54,557 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:15:55,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:55,498 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-11 13:15:55,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:15:55,499 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:15:55,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:55,500 INFO L225 Difference]: With dead ends: 119 [2020-10-11 13:15:55,500 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 13:15:55,500 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:15:55,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 13:15:55,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-11 13:15:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:15:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:15:55,503 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:15:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:55,503 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:15:55,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:15:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:15:55,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:15:55,504 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:55,504 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:55,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:55,712 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:55,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:55,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-11 13:15:55,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:55,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174838082] [2020-10-11 13:15:55,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:55,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174838082] [2020-10-11 13:15:55,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699851615] [2020-10-11 13:15:55,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:56,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:15:56,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:56,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:15:56,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:56,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:56,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:15:56,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568319427] [2020-10-11 13:15:56,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:56,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:56,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:56,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:56,047 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:15:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:56,861 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-11 13:15:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:15:56,862 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:15:56,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:56,863 INFO L225 Difference]: With dead ends: 116 [2020-10-11 13:15:56,863 INFO L226 Difference]: Without dead ends: 110 [2020-10-11 13:15:56,864 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:15:56,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-11 13:15:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-11 13:15:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:15:56,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:15:56,866 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:15:56,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:56,866 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:15:56,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:56,866 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:15:56,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:15:56,867 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:56,867 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:57,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-11 13:15:57,067 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:57,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:57,068 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-11 13:15:57,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:57,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144496307] [2020-10-11 13:15:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:57,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144496307] [2020-10-11 13:15:57,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133196532] [2020-10-11 13:15:57,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:57,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:15:57,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:57,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:15:57,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:57,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:57,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:57,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:15:57,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069024998] [2020-10-11 13:15:57,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:15:57,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:57,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:15:57,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:15:57,433 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:15:58,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:58,471 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-11 13:15:58,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:15:58,472 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:15:58,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:58,473 INFO L225 Difference]: With dead ends: 115 [2020-10-11 13:15:58,473 INFO L226 Difference]: Without dead ends: 109 [2020-10-11 13:15:58,473 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:15:58,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-11 13:15:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-11 13:15:58,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:15:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:15:58,477 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:15:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:58,477 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:15:58,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:15:58,477 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:15:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:15:58,478 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:58,478 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:58,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:58,687 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:58,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:58,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-11 13:15:58,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:58,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457799350] [2020-10-11 13:15:58,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:58,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457799350] [2020-10-11 13:15:58,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819645329] [2020-10-11 13:15:58,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:58,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:15:58,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:59,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:59,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:15:59,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123275786] [2020-10-11 13:15:59,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:59,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:59,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:59,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:59,021 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:15:59,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:59,934 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-11 13:15:59,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:15:59,935 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:15:59,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:59,936 INFO L225 Difference]: With dead ends: 112 [2020-10-11 13:15:59,936 INFO L226 Difference]: Without dead ends: 106 [2020-10-11 13:15:59,936 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:15:59,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-11 13:15:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-11 13:15:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:15:59,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:15:59,938 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:15:59,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:59,938 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:15:59,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:59,938 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:15:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:15:59,939 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:59,939 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:00,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-11 13:16:00,140 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:00,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:00,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-11 13:16:00,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:00,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324647139] [2020-10-11 13:16:00,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:00,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324647139] [2020-10-11 13:16:00,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099480086] [2020-10-11 13:16:00,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:00,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:00,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:00,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:00,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:00,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:00,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:00,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:00,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761924294] [2020-10-11 13:16:00,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:00,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:00,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:00,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:00,498 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:01,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:01,635 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-11 13:16:01,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:16:01,636 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:01,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:01,636 INFO L225 Difference]: With dead ends: 111 [2020-10-11 13:16:01,637 INFO L226 Difference]: Without dead ends: 105 [2020-10-11 13:16:01,637 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:16:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-11 13:16:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-11 13:16:01,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:01,639 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:01,639 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:01,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:01,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:01,640 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:01,640 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:01,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-11 13:16:01,841 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:01,841 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-11 13:16:01,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:01,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473595670] [2020-10-11 13:16:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:02,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473595670] [2020-10-11 13:16:02,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588136972] [2020-10-11 13:16:02,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:02,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:16:02,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:02,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:02,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:02,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:02,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:02,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020457024] [2020-10-11 13:16:02,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:02,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:02,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:02,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:02,176 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:03,140 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-11 13:16:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:16:03,140 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:03,141 INFO L225 Difference]: With dead ends: 108 [2020-10-11 13:16:03,141 INFO L226 Difference]: Without dead ends: 102 [2020-10-11 13:16:03,141 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 13:16:03,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-11 13:16:03,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-11 13:16:03,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:03,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:03,143 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:03,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:03,143 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:03,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:03,144 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:03,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:03,144 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:03,144 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:03,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:03,348 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:03,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:03,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-11 13:16:03,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:03,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421984947] [2020-10-11 13:16:03,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:03,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421984947] [2020-10-11 13:16:03,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852393626] [2020-10-11 13:16:03,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:03,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:03,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:03,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:03,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:03,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:03,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:03,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:03,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483368875] [2020-10-11 13:16:03,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:03,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:03,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:03,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:03,708 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:04,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:04,948 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-11 13:16:04,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:16:04,949 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:04,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:04,950 INFO L225 Difference]: With dead ends: 107 [2020-10-11 13:16:04,950 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:16:04,951 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 13:16:04,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:16:04,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-11 13:16:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:04,953 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:04,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:04,953 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:04,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:04,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:04,953 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:04,954 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:05,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:05,162 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:05,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:05,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-11 13:16:05,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:05,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808030827] [2020-10-11 13:16:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:05,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808030827] [2020-10-11 13:16:05,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546067272] [2020-10-11 13:16:05,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:05,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:16:05,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:05,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:05,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:05,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:05,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:05,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914271909] [2020-10-11 13:16:05,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:05,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:05,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:05,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:05,492 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:06,527 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-11 13:16:06,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:16:06,528 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:06,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:06,528 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:16:06,528 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:16:06,529 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:16:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:16:06,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-11 13:16:06,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:06,531 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:06,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:06,531 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:06,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:06,532 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:06,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:06,532 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:06,532 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:06,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:06,733 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:06,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:06,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-11 13:16:06,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:06,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039548238] [2020-10-11 13:16:06,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:06,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039548238] [2020-10-11 13:16:06,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527109389] [2020-10-11 13:16:06,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:07,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:16:07,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:07,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:07,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:07,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:07,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:07,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:07,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024740336] [2020-10-11 13:16:07,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:07,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:07,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:07,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:07,099 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:08,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:08,469 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-11 13:16:08,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:16:08,470 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:08,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:08,471 INFO L225 Difference]: With dead ends: 103 [2020-10-11 13:16:08,471 INFO L226 Difference]: Without dead ends: 97 [2020-10-11 13:16:08,471 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-11 13:16:08,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-11 13:16:08,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-11 13:16:08,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:08,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:08,474 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:08,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:08,474 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:08,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:08,475 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:08,475 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:08,475 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:08,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-11 13:16:08,685 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:08,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-11 13:16:08,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:08,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183108399] [2020-10-11 13:16:08,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:08,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183108399] [2020-10-11 13:16:08,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333229670] [2020-10-11 13:16:08,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:08,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:08,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:09,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:09,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:09,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852931978] [2020-10-11 13:16:09,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:09,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:09,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:09,014 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:10,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:10,152 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-11 13:16:10,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:16:10,153 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:10,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:10,153 INFO L225 Difference]: With dead ends: 119 [2020-10-11 13:16:10,153 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 13:16:10,154 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:16:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 13:16:10,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-11 13:16:10,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-11 13:16:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-11 13:16:10,156 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-11 13:16:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:10,156 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-11 13:16:10,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:10,156 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-11 13:16:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:10,157 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:10,157 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:10,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:10,357 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:10,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:10,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-11 13:16:10,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:10,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168557425] [2020-10-11 13:16:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:10,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168557425] [2020-10-11 13:16:10,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656765252] [2020-10-11 13:16:10,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:10,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:10,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:10,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:10,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:10,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:10,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:10,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:10,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583816106] [2020-10-11 13:16:10,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:10,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:10,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:10,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:10,705 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-11 13:16:12,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:12,114 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-11 13:16:12,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 13:16:12,114 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:12,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:12,115 INFO L225 Difference]: With dead ends: 100 [2020-10-11 13:16:12,115 INFO L226 Difference]: Without dead ends: 92 [2020-10-11 13:16:12,115 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:16:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-11 13:16:12,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-11 13:16:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-11 13:16:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-11 13:16:12,116 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-11 13:16:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:12,116 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-11 13:16:12,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-11 13:16:12,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:12,117 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:12,117 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:12,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:12,318 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:12,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:12,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-11 13:16:12,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:12,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102757893] [2020-10-11 13:16:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:12,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102757893] [2020-10-11 13:16:12,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915445443] [2020-10-11 13:16:12,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:12,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:16:12,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:12,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:12,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:12,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:16:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:12,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:12,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:12,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897201557] [2020-10-11 13:16:12,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:12,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:12,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:12,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:12,681 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-11 13:16:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:14,015 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-11 13:16:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:16:14,016 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:14,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:14,017 INFO L225 Difference]: With dead ends: 116 [2020-10-11 13:16:14,017 INFO L226 Difference]: Without dead ends: 111 [2020-10-11 13:16:14,017 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:16:14,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-11 13:16:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-11 13:16:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 13:16:14,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-11 13:16:14,019 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-11 13:16:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:14,019 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-11 13:16:14,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-11 13:16:14,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:14,020 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:14,020 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:14,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:14,221 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:14,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:14,221 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-11 13:16:14,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:14,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911072778] [2020-10-11 13:16:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:14,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911072778] [2020-10-11 13:16:14,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524546441] [2020-10-11 13:16:14,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:14,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:14,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:14,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:14,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:14,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:16:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:14,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:14,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:14,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495647132] [2020-10-11 13:16:14,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:14,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:14,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:14,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:14,602 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-11 13:16:16,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:16,000 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-11 13:16:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:16:16,000 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:16,001 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:16:16,001 INFO L226 Difference]: Without dead ends: 91 [2020-10-11 13:16:16,001 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-11 13:16:16,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-11 13:16:16,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-11 13:16:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 13:16:16,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-11 13:16:16,002 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-11 13:16:16,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:16,003 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-11 13:16:16,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-11 13:16:16,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:16,003 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:16,003 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:16,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:16,204 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:16,204 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-11 13:16:16,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:16,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220464535] [2020-10-11 13:16:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:16,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220464535] [2020-10-11 13:16:16,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782110375] [2020-10-11 13:16:16,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:16,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:16:16,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:16,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:16,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:16,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:16,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:16,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473585504] [2020-10-11 13:16:16,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:16,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:16,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:16,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:16,658 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-11 13:16:17,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:17,288 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-11 13:16:17,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:16:17,289 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:17,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:17,289 INFO L225 Difference]: With dead ends: 102 [2020-10-11 13:16:17,290 INFO L226 Difference]: Without dead ends: 96 [2020-10-11 13:16:17,290 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:16:17,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-11 13:16:17,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-11 13:16:17,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:16:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-11 13:16:17,292 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-11 13:16:17,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:17,292 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-11 13:16:17,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:17,292 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-11 13:16:17,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:17,292 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:17,293 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:17,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-11 13:16:17,493 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:17,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:17,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-11 13:16:17,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:17,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486194119] [2020-10-11 13:16:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:17,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486194119] [2020-10-11 13:16:17,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923144421] [2020-10-11 13:16:17,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:17,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:16:17,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:17,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:17,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:17,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:17,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:17,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:17,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841008487] [2020-10-11 13:16:17,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:17,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:17,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:17,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:17,956 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-11 13:16:18,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:18,612 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-11 13:16:18,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:16:18,613 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:18,613 INFO L225 Difference]: With dead ends: 122 [2020-10-11 13:16:18,613 INFO L226 Difference]: Without dead ends: 116 [2020-10-11 13:16:18,614 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:16:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-11 13:16:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-11 13:16:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-11 13:16:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-11 13:16:18,616 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-11 13:16:18,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:18,616 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-11 13:16:18,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:18,616 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-11 13:16:18,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:18,617 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:18,617 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:18,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-11 13:16:18,817 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:18,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:18,818 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-11 13:16:18,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:18,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883872612] [2020-10-11 13:16:18,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:19,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883872612] [2020-10-11 13:16:19,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438743988] [2020-10-11 13:16:19,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:19,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:19,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:19,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:19,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:19,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711268717] [2020-10-11 13:16:19,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:19,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:19,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:19,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:19,234 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-11 13:16:19,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:19,954 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-11 13:16:19,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:16:19,955 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:19,956 INFO L225 Difference]: With dead ends: 123 [2020-10-11 13:16:19,956 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 13:16:19,956 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:16:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 13:16:19,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-11 13:16:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:16:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-11 13:16:19,959 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-11 13:16:19,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:19,959 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-11 13:16:19,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:19,959 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-11 13:16:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:19,959 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:19,959 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:20,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-11 13:16:20,160 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:20,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:20,161 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-11 13:16:20,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:20,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221917201] [2020-10-11 13:16:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:20,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221917201] [2020-10-11 13:16:20,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158835765] [2020-10-11 13:16:20,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:20,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:20,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:20,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:20,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:20,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:20,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:20,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:20,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005932330] [2020-10-11 13:16:20,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:20,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:20,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:20,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:20,621 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-11 13:16:21,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:21,352 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-11 13:16:21,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:16:21,353 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:21,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:21,353 INFO L225 Difference]: With dead ends: 139 [2020-10-11 13:16:21,353 INFO L226 Difference]: Without dead ends: 133 [2020-10-11 13:16:21,353 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:16:21,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-11 13:16:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-11 13:16:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:16:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-11 13:16:21,356 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-11 13:16:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:21,356 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-11 13:16:21,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-11 13:16:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:21,357 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:21,357 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:21,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-11 13:16:21,565 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:21,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-11 13:16:21,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:21,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432761873] [2020-10-11 13:16:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:21,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432761873] [2020-10-11 13:16:21,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849713028] [2020-10-11 13:16:21,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:21,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:16:21,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:21,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:21,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:21,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:21,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:21,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277352897] [2020-10-11 13:16:21,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:21,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:21,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:21,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:21,976 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-11 13:16:22,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:22,762 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-11 13:16:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:16:22,762 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:22,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:22,763 INFO L225 Difference]: With dead ends: 139 [2020-10-11 13:16:22,763 INFO L226 Difference]: Without dead ends: 133 [2020-10-11 13:16:22,763 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:16:22,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-11 13:16:22,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-11 13:16:22,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-11 13:16:22,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-11 13:16:22,765 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-11 13:16:22,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:22,766 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-11 13:16:22,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:22,766 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-11 13:16:22,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:22,766 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:22,766 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:22,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:22,967 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:22,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:22,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-11 13:16:22,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:22,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431516548] [2020-10-11 13:16:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:23,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431516548] [2020-10-11 13:16:23,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707446600] [2020-10-11 13:16:23,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:23,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:23,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:23,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:23,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:23,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:23,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:23,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:23,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011525147] [2020-10-11 13:16:23,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:23,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:23,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:23,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:23,418 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-11 13:16:24,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:24,273 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-11 13:16:24,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:16:24,274 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:24,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:24,274 INFO L225 Difference]: With dead ends: 136 [2020-10-11 13:16:24,275 INFO L226 Difference]: Without dead ends: 130 [2020-10-11 13:16:24,275 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:16:24,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-11 13:16:24,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-11 13:16:24,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 13:16:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-11 13:16:24,277 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-11 13:16:24,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:24,277 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-11 13:16:24,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:24,277 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-11 13:16:24,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:24,278 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:24,278 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:24,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-11 13:16:24,478 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:24,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-11 13:16:24,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:24,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931016000] [2020-10-11 13:16:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:24,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931016000] [2020-10-11 13:16:24,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428634958] [2020-10-11 13:16:24,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:24,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:16:24,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:24,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:24,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:24,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:24,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:24,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540330971] [2020-10-11 13:16:24,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:24,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:24,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:24,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:24,878 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-11 13:16:25,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:25,721 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-11 13:16:25,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:16:25,722 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:25,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:25,722 INFO L225 Difference]: With dead ends: 137 [2020-10-11 13:16:25,722 INFO L226 Difference]: Without dead ends: 131 [2020-10-11 13:16:25,723 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:16:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-11 13:16:25,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-11 13:16:25,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-11 13:16:25,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-11 13:16:25,725 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-11 13:16:25,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:25,726 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-11 13:16:25,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:25,726 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-11 13:16:25,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:25,726 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:25,726 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:25,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:25,927 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:25,927 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-11 13:16:25,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:25,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099505250] [2020-10-11 13:16:25,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:26,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099505250] [2020-10-11 13:16:26,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135742868] [2020-10-11 13:16:26,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:26,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:16:26,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:26,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:26,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:26,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:26,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:26,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:26,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937629934] [2020-10-11 13:16:26,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:26,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:26,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:26,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:26,365 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-11 13:16:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:27,346 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-11 13:16:27,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:16:27,346 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:27,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:27,347 INFO L225 Difference]: With dead ends: 134 [2020-10-11 13:16:27,347 INFO L226 Difference]: Without dead ends: 128 [2020-10-11 13:16:27,347 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:16:27,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-11 13:16:27,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-11 13:16:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-11 13:16:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-11 13:16:27,350 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-11 13:16:27,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:27,350 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-11 13:16:27,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-11 13:16:27,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:27,351 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:27,351 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:27,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-11 13:16:27,553 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:27,553 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-11 13:16:27,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:27,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811996769] [2020-10-11 13:16:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:27,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811996769] [2020-10-11 13:16:27,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585228977] [2020-10-11 13:16:27,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:27,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:27,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:27,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:27,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:27,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008505531] [2020-10-11 13:16:27,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:27,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:27,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:27,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:27,933 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-11 13:16:28,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:28,865 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-11 13:16:28,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:16:28,866 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:28,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:28,866 INFO L225 Difference]: With dead ends: 135 [2020-10-11 13:16:28,866 INFO L226 Difference]: Without dead ends: 129 [2020-10-11 13:16:28,867 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:16:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-11 13:16:28,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-11 13:16:28,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:16:28,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-11 13:16:28,869 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-11 13:16:28,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:28,869 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-11 13:16:28,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-11 13:16:28,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:28,869 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:28,869 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:29,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:29,070 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:29,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:29,071 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-11 13:16:29,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:29,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970053731] [2020-10-11 13:16:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:29,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970053731] [2020-10-11 13:16:29,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052037215] [2020-10-11 13:16:29,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:29,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:29,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:29,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:29,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:29,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:29,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:29,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:29,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258872873] [2020-10-11 13:16:29,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:29,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:29,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:29,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:29,485 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-11 13:16:30,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:30,555 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-11 13:16:30,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:16:30,556 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:30,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:30,556 INFO L225 Difference]: With dead ends: 132 [2020-10-11 13:16:30,556 INFO L226 Difference]: Without dead ends: 126 [2020-10-11 13:16:30,557 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 13:16:30,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-11 13:16:30,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-11 13:16:30,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:16:30,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-11 13:16:30,559 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-11 13:16:30,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:30,559 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-11 13:16:30,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:30,559 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-11 13:16:30,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:30,559 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:30,559 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:30,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:30,760 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:30,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:30,761 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-11 13:16:30,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:30,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258799484] [2020-10-11 13:16:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:31,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258799484] [2020-10-11 13:16:31,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841254116] [2020-10-11 13:16:31,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:31,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:16:31,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:31,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:31,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:31,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:31,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:31,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434299593] [2020-10-11 13:16:31,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:31,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:31,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:31,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:31,152 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-11 13:16:32,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:32,151 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-11 13:16:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:16:32,154 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:32,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:32,155 INFO L225 Difference]: With dead ends: 133 [2020-10-11 13:16:32,155 INFO L226 Difference]: Without dead ends: 127 [2020-10-11 13:16:32,155 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:16:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-11 13:16:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-11 13:16:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-11 13:16:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-11 13:16:32,157 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-11 13:16:32,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:32,157 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-11 13:16:32,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:32,157 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-11 13:16:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:32,158 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:32,158 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:32,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:32,359 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:32,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:32,359 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-11 13:16:32,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:32,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021282345] [2020-10-11 13:16:32,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:32,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021282345] [2020-10-11 13:16:32,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615471340] [2020-10-11 13:16:32,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:32,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:32,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:32,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:32,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:32,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:32,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:32,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:32,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026652668] [2020-10-11 13:16:32,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:32,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:32,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:32,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:32,770 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-11 13:16:33,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:33,937 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-11 13:16:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:16:33,938 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:33,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:33,939 INFO L225 Difference]: With dead ends: 130 [2020-10-11 13:16:33,939 INFO L226 Difference]: Without dead ends: 124 [2020-10-11 13:16:33,940 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:16:33,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-11 13:16:33,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-11 13:16:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 13:16:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-11 13:16:33,942 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-11 13:16:33,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:33,942 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-11 13:16:33,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:33,942 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-11 13:16:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:33,943 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:33,943 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:34,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:34,143 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:34,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:34,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-11 13:16:34,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:34,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272681774] [2020-10-11 13:16:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:34,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272681774] [2020-10-11 13:16:34,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627947351] [2020-10-11 13:16:34,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:34,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:16:34,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:34,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:34,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:34,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:34,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:34,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601787395] [2020-10-11 13:16:34,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:34,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:34,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:34,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:34,526 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-11 13:16:35,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:35,590 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-11 13:16:35,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:16:35,591 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:35,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:35,591 INFO L225 Difference]: With dead ends: 131 [2020-10-11 13:16:35,591 INFO L226 Difference]: Without dead ends: 125 [2020-10-11 13:16:35,592 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 13:16:35,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-11 13:16:35,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-11 13:16:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-11 13:16:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-11 13:16:35,594 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-11 13:16:35,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:35,594 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-11 13:16:35,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:35,594 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-11 13:16:35,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:35,595 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:35,595 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:35,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-11 13:16:35,796 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:35,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:35,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-11 13:16:35,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:35,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030664568] [2020-10-11 13:16:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:36,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030664568] [2020-10-11 13:16:36,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802859040] [2020-10-11 13:16:36,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:36,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:16:36,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:36,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:36,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:36,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:36,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:36,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:36,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628884359] [2020-10-11 13:16:36,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:36,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:36,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:36,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:36,202 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-11 13:16:37,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:37,481 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-11 13:16:37,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:16:37,482 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:37,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:37,483 INFO L225 Difference]: With dead ends: 128 [2020-10-11 13:16:37,483 INFO L226 Difference]: Without dead ends: 122 [2020-10-11 13:16:37,483 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:16:37,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-11 13:16:37,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-11 13:16:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-11 13:16:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-11 13:16:37,485 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-11 13:16:37,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:37,486 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-11 13:16:37,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:37,486 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-11 13:16:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:37,486 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:37,486 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:37,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-11 13:16:37,687 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:37,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:37,688 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-11 13:16:37,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:37,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477106197] [2020-10-11 13:16:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:37,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477106197] [2020-10-11 13:16:37,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006619528] [2020-10-11 13:16:37,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:38,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:38,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:38,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:38,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:38,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460311683] [2020-10-11 13:16:38,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:38,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:38,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:38,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:38,076 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-11 13:16:39,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:39,231 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-11 13:16:39,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:16:39,232 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:39,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:39,232 INFO L225 Difference]: With dead ends: 129 [2020-10-11 13:16:39,232 INFO L226 Difference]: Without dead ends: 123 [2020-10-11 13:16:39,232 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-11 13:16:39,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-11 13:16:39,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-11 13:16:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:39,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:39,235 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-11 13:16:39,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:39,235 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:39,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:39,235 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:39,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:39,236 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:39,236 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:39,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-11 13:16:39,436 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:39,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:39,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-11 13:16:39,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:39,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88984388] [2020-10-11 13:16:39,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:39,737 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:39,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88984388] [2020-10-11 13:16:39,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909156847] [2020-10-11 13:16:39,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:39,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:39,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:39,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:39,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:39,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:39,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:39,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:39,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3637922] [2020-10-11 13:16:39,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:39,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:39,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:39,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:39,831 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-11 13:16:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:41,241 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-11 13:16:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:16:41,242 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:41,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:41,242 INFO L225 Difference]: With dead ends: 126 [2020-10-11 13:16:41,242 INFO L226 Difference]: Without dead ends: 120 [2020-10-11 13:16:41,243 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-11 13:16:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-11 13:16:41,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-11 13:16:41,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:41,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:41,244 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-11 13:16:41,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:41,244 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:41,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:41,245 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:41,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:41,245 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:41,245 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:41,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-11 13:16:41,446 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:41,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:41,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-11 13:16:41,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:41,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194169841] [2020-10-11 13:16:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:41,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194169841] [2020-10-11 13:16:41,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635121064] [2020-10-11 13:16:41,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:41,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:16:41,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:41,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:41,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:41,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:41,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:41,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213455189] [2020-10-11 13:16:41,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:41,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:41,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:41,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:41,828 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-11 13:16:43,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:43,051 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-11 13:16:43,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 13:16:43,052 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:43,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:43,052 INFO L225 Difference]: With dead ends: 127 [2020-10-11 13:16:43,052 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 13:16:43,052 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:16:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 13:16:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-11 13:16:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-11 13:16:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-11 13:16:43,055 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-11 13:16:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:43,055 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-11 13:16:43,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-11 13:16:43,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:43,056 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:43,056 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:43,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:43,257 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:43,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:43,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-11 13:16:43,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:43,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177134844] [2020-10-11 13:16:43,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:43,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177134844] [2020-10-11 13:16:43,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275745612] [2020-10-11 13:16:43,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:43,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:43,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:43,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:43,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:43,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:43,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:43,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:43,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143480906] [2020-10-11 13:16:43,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:43,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:43,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:43,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:43,662 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-11 13:16:45,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:45,171 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-11 13:16:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 13:16:45,172 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:45,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:45,173 INFO L225 Difference]: With dead ends: 124 [2020-10-11 13:16:45,173 INFO L226 Difference]: Without dead ends: 118 [2020-10-11 13:16:45,173 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-11 13:16:45,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-11 13:16:45,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-11 13:16:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 13:16:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-11 13:16:45,175 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-11 13:16:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:45,175 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-11 13:16:45,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-11 13:16:45,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:45,176 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:45,176 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:45,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-11 13:16:45,377 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:45,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:45,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-11 13:16:45,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:45,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563618957] [2020-10-11 13:16:45,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:45,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563618957] [2020-10-11 13:16:45,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725750589] [2020-10-11 13:16:45,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:45,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:16:45,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:45,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:45,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:45,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:45,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:45,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323051699] [2020-10-11 13:16:45,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:45,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:45,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:45,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:45,755 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-11 13:16:47,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:47,047 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-11 13:16:47,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 13:16:47,048 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:47,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:47,048 INFO L225 Difference]: With dead ends: 144 [2020-10-11 13:16:47,048 INFO L226 Difference]: Without dead ends: 138 [2020-10-11 13:16:47,049 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-11 13:16:47,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-11 13:16:47,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-11 13:16:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-11 13:16:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-11 13:16:47,052 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-11 13:16:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:47,052 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-11 13:16:47,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-11 13:16:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:47,052 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:47,053 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:47,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:47,264 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:47,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-11 13:16:47,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:47,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277633593] [2020-10-11 13:16:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:47,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277633593] [2020-10-11 13:16:47,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495301688] [2020-10-11 13:16:47,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:47,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:16:47,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:47,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:47,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:47,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:47,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:47,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:47,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579808204] [2020-10-11 13:16:47,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:47,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:47,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:47,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:47,674 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-11 13:16:49,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:49,251 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-11 13:16:49,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-11 13:16:49,252 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:49,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:49,253 INFO L225 Difference]: With dead ends: 125 [2020-10-11 13:16:49,253 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 13:16:49,253 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 13:16:49,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 13:16:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-11 13:16:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-11 13:16:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-11 13:16:49,256 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-11 13:16:49,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:49,256 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-11 13:16:49,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-11 13:16:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:16:49,256 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:49,257 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:49,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-11 13:16:49,457 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:49,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:49,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-11 13:16:49,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:49,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876630111] [2020-10-11 13:16:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:49,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876630111] [2020-10-11 13:16:49,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653765805] [2020-10-11 13:16:49,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:49,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:16:49,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:49,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:49,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:16:49,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452434250] [2020-10-11 13:16:49,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:49,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:49,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:49,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:49,954 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-11 13:16:50,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:50,667 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-10-11 13:16:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:16:50,668 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:16:50,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:50,668 INFO L225 Difference]: With dead ends: 144 [2020-10-11 13:16:50,669 INFO L226 Difference]: Without dead ends: 138 [2020-10-11 13:16:50,669 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:16:50,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-11 13:16:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-10-11 13:16:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:16:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:16:50,672 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:16:50,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:50,672 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:16:50,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:16:50,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:16:50,672 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:50,672 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:50,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:50,873 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:50,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:50,874 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-10-11 13:16:50,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:50,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753386659] [2020-10-11 13:16:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:51,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753386659] [2020-10-11 13:16:51,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755179432] [2020-10-11 13:16:51,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:51,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:51,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:51,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:16:51,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:51,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:51,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:51,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:16:51,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496227023] [2020-10-11 13:16:51,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:16:51,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:51,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:16:51,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:16:51,416 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:16:52,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:52,215 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-10-11 13:16:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:16:52,216 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:16:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:52,216 INFO L225 Difference]: With dead ends: 141 [2020-10-11 13:16:52,217 INFO L226 Difference]: Without dead ends: 135 [2020-10-11 13:16:52,217 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:16:52,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-11 13:16:52,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-10-11 13:16:52,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:16:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:16:52,219 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:16:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:52,219 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:16:52,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:16:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:16:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:16:52,220 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:52,220 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:52,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-10-11 13:16:52,421 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:52,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:52,421 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-10-11 13:16:52,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:52,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466598854] [2020-10-11 13:16:52,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:52,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466598854] [2020-10-11 13:16:52,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450598732] [2020-10-11 13:16:52,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:52,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:16:52,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:52,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:16:52,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:52,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:52,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:16:52,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745864604] [2020-10-11 13:16:52,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:52,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:52,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:52,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:52,911 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:16:53,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:53,716 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-10-11 13:16:53,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:16:53,716 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:16:53,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:53,717 INFO L225 Difference]: With dead ends: 138 [2020-10-11 13:16:53,717 INFO L226 Difference]: Without dead ends: 132 [2020-10-11 13:16:53,717 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:16:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-11 13:16:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-10-11 13:16:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:16:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:16:53,720 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:16:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:53,720 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:16:53,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:16:53,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:16:53,721 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:53,721 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:53,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:53,921 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:53,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:53,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-10-11 13:16:53,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:53,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554877527] [2020-10-11 13:16:53,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:54,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554877527] [2020-10-11 13:16:54,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751743643] [2020-10-11 13:16:54,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:54,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:54,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:54,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:16:54,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:54,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:54,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:54,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:16:54,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107849301] [2020-10-11 13:16:54,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:16:54,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:54,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:16:54,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:16:54,421 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:16:55,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:55,398 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-11 13:16:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:16:55,400 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:16:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:55,400 INFO L225 Difference]: With dead ends: 137 [2020-10-11 13:16:55,400 INFO L226 Difference]: Without dead ends: 131 [2020-10-11 13:16:55,401 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:16:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-11 13:16:55,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-10-11 13:16:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:16:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:16:55,403 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:16:55,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:55,403 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:16:55,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:16:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:16:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:16:55,403 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:55,403 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:55,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-10-11 13:16:55,604 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:55,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:55,605 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-10-11 13:16:55,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:55,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716573854] [2020-10-11 13:16:55,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:56,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716573854] [2020-10-11 13:16:56,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487884275] [2020-10-11 13:16:56,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:56,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:16:56,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:56,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:16:56,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:56,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:56,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:16:56,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451173133] [2020-10-11 13:16:56,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:56,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:56,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:56,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:56,073 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:16:56,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:56,972 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-11 13:16:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:16:56,973 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:16:56,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:56,974 INFO L225 Difference]: With dead ends: 134 [2020-10-11 13:16:56,974 INFO L226 Difference]: Without dead ends: 128 [2020-10-11 13:16:56,974 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:16:56,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-11 13:16:56,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-11 13:16:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:16:56,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:16:56,976 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:16:56,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:56,977 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:16:56,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:56,977 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:16:56,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:16:56,977 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:56,977 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:57,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-11 13:16:57,186 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:57,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:57,186 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-10-11 13:16:57,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:57,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056943850] [2020-10-11 13:16:57,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:57,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056943850] [2020-10-11 13:16:57,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089070180] [2020-10-11 13:16:57,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:57,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:16:57,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:57,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:16:57,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:57,659 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:57,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:57,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:16:57,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962788913] [2020-10-11 13:16:57,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:16:57,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:57,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:16:57,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:16:57,677 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:16:58,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:58,764 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-11 13:16:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:16:58,764 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:16:58,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:58,765 INFO L225 Difference]: With dead ends: 133 [2020-10-11 13:16:58,765 INFO L226 Difference]: Without dead ends: 127 [2020-10-11 13:16:58,765 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:16:58,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-11 13:16:58,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-10-11 13:16:58,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:16:58,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:16:58,767 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:16:58,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:58,767 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:16:58,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:16:58,768 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:16:58,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:16:58,768 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:58,768 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:58,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-11 13:16:58,969 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:58,970 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-10-11 13:16:58,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:58,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476404779] [2020-10-11 13:16:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:59,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476404779] [2020-10-11 13:16:59,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138048289] [2020-10-11 13:16:59,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:59,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:16:59,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:59,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:59,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:16:59,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738217533] [2020-10-11 13:16:59,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:59,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:59,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:59,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:59,435 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:17:00,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:00,405 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-10-11 13:17:00,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:17:00,407 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:17:00,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:00,407 INFO L225 Difference]: With dead ends: 130 [2020-10-11 13:17:00,407 INFO L226 Difference]: Without dead ends: 124 [2020-10-11 13:17:00,408 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:17:00,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-11 13:17:00,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-10-11 13:17:00,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:17:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:17:00,411 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:17:00,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:00,411 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:17:00,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:00,411 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:17:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:00,411 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:00,412 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:00,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:00,615 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:00,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:00,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-10-11 13:17:00,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:00,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486252451] [2020-10-11 13:17:00,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:01,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486252451] [2020-10-11 13:17:01,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976019558] [2020-10-11 13:17:01,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:01,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:17:01,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:01,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:01,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:01,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:01,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:01,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:17:01,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689585395] [2020-10-11 13:17:01,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:17:01,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:01,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:17:01,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:17:01,129 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:17:02,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:02,321 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-11 13:17:02,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:17:02,322 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:17:02,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:02,322 INFO L225 Difference]: With dead ends: 129 [2020-10-11 13:17:02,322 INFO L226 Difference]: Without dead ends: 123 [2020-10-11 13:17:02,323 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:17:02,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-11 13:17:02,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-10-11 13:17:02,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:17:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:17:02,325 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:17:02,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:02,325 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:17:02,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:17:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:17:02,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:02,326 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:02,326 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:02,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-11 13:17:02,526 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:02,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:02,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-10-11 13:17:02,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:02,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050722102] [2020-10-11 13:17:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:02,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050722102] [2020-10-11 13:17:02,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935687421] [2020-10-11 13:17:02,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:02,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:17:02,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:02,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:02,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:02,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:02,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:17:02,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036890056] [2020-10-11 13:17:02,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:02,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:02,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:02,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:02,984 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:17:04,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:04,055 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-10-11 13:17:04,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:17:04,056 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:17:04,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:04,057 INFO L225 Difference]: With dead ends: 126 [2020-10-11 13:17:04,057 INFO L226 Difference]: Without dead ends: 120 [2020-10-11 13:17:04,057 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 13:17:04,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-11 13:17:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-10-11 13:17:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:17:04,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:17:04,060 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:17:04,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:04,060 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:17:04,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:04,060 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:17:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:04,060 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:04,060 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:04,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:04,261 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:04,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:04,262 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-10-11 13:17:04,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:04,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233078372] [2020-10-11 13:17:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:04,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233078372] [2020-10-11 13:17:04,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351302758] [2020-10-11 13:17:04,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:04,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:17:04,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:04,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:04,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:04,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:04,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:04,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:17:04,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202662228] [2020-10-11 13:17:04,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:17:04,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:04,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:17:04,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:17:04,740 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:17:06,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:06,089 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-10-11 13:17:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:17:06,090 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:17:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:06,091 INFO L225 Difference]: With dead ends: 125 [2020-10-11 13:17:06,091 INFO L226 Difference]: Without dead ends: 119 [2020-10-11 13:17:06,091 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 13:17:06,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-11 13:17:06,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-10-11 13:17:06,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:17:06,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:17:06,094 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:17:06,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:06,094 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:17:06,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:17:06,094 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:17:06,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:06,095 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:06,095 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:06,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-10-11 13:17:06,297 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:06,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:06,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-10-11 13:17:06,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:06,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533049189] [2020-10-11 13:17:06,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:06,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533049189] [2020-10-11 13:17:06,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552318091] [2020-10-11 13:17:06,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:06,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:17:06,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:06,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:06,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:06,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:06,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:17:06,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130761604] [2020-10-11 13:17:06,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:06,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:06,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:06,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:06,742 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:17:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:07,933 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-10-11 13:17:07,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:17:07,934 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:17:07,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:07,934 INFO L225 Difference]: With dead ends: 122 [2020-10-11 13:17:07,934 INFO L226 Difference]: Without dead ends: 116 [2020-10-11 13:17:07,935 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:17:07,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-11 13:17:07,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-11 13:17:07,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:17:07,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:17:07,938 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:17:07,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:07,938 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:17:07,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:07,938 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:17:07,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:07,939 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:07,939 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:08,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:08,144 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:08,144 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-10-11 13:17:08,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:08,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159386060] [2020-10-11 13:17:08,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:08,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159386060] [2020-10-11 13:17:08,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009873318] [2020-10-11 13:17:08,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:08,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:17:08,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:08,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:08,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:08,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:08,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:08,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:17:08,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318529153] [2020-10-11 13:17:08,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:17:08,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:08,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:17:08,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:17:08,628 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:17:10,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:10,079 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-10-11 13:17:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:17:10,080 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:17:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:10,080 INFO L225 Difference]: With dead ends: 121 [2020-10-11 13:17:10,080 INFO L226 Difference]: Without dead ends: 115 [2020-10-11 13:17:10,081 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-10-11 13:17:10,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-11 13:17:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-10-11 13:17:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:17:10,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:17:10,084 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:17:10,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:10,084 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:17:10,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:17:10,084 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:17:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:10,085 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:10,085 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:10,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-10-11 13:17:10,290 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:10,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:10,290 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-10-11 13:17:10,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:10,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406794221] [2020-10-11 13:17:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:10,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406794221] [2020-10-11 13:17:10,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780522759] [2020-10-11 13:17:10,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:10,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:10,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:10,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:10,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:17:10,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553238857] [2020-10-11 13:17:10,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:10,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:10,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:10,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:10,734 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:17:11,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:11,980 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-10-11 13:17:11,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:17:11,981 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:17:11,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:11,982 INFO L225 Difference]: With dead ends: 118 [2020-10-11 13:17:11,982 INFO L226 Difference]: Without dead ends: 112 [2020-10-11 13:17:11,982 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:17:11,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-11 13:17:11,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-10-11 13:17:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:17:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:17:11,985 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:17:11,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:11,985 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:17:11,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:11,985 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:17:11,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:11,985 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:11,985 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:12,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:12,186 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:12,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:12,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-10-11 13:17:12,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:12,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094010204] [2020-10-11 13:17:12,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:12,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094010204] [2020-10-11 13:17:12,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264310636] [2020-10-11 13:17:12,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:12,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:17:12,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:12,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:12,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:12,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:12,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:12,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:17:12,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242124580] [2020-10-11 13:17:12,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:17:12,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:12,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:17:12,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:17:12,659 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:17:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:14,259 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-10-11 13:17:14,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:17:14,261 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:17:14,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:14,261 INFO L225 Difference]: With dead ends: 117 [2020-10-11 13:17:14,261 INFO L226 Difference]: Without dead ends: 111 [2020-10-11 13:17:14,262 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:17:14,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-11 13:17:14,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-10-11 13:17:14,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:17:14,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:17:14,264 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:17:14,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:14,264 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:17:14,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:17:14,264 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:17:14,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:14,264 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:14,264 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:14,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:14,465 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:14,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:14,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-10-11 13:17:14,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:14,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312182363] [2020-10-11 13:17:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:14,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312182363] [2020-10-11 13:17:14,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760208842] [2020-10-11 13:17:14,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:14,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:17:14,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:14,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:14,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:14,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:14,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:17:14,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058603105] [2020-10-11 13:17:14,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:14,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:14,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:14,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:14,900 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:17:16,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:16,276 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-11 13:17:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:17:16,277 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:17:16,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:16,278 INFO L225 Difference]: With dead ends: 114 [2020-10-11 13:17:16,278 INFO L226 Difference]: Without dead ends: 108 [2020-10-11 13:17:16,278 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-11 13:17:16,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-11 13:17:16,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-11 13:17:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:17:16,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:17:16,281 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:17:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:16,281 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:17:16,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:16,281 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:17:16,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:16,281 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:16,281 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:16,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-11 13:17:16,482 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:16,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:16,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-10-11 13:17:16,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:16,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255396376] [2020-10-11 13:17:16,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:16,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255396376] [2020-10-11 13:17:16,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009499920] [2020-10-11 13:17:16,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:16,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:17:16,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:16,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:16,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:16,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:16,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:16,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:17:16,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285951173] [2020-10-11 13:17:16,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:17:16,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:16,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:17:16,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:17:16,935 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:17:18,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:18,666 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-11 13:17:18,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 13:17:18,667 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:17:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:18,667 INFO L225 Difference]: With dead ends: 113 [2020-10-11 13:17:18,667 INFO L226 Difference]: Without dead ends: 107 [2020-10-11 13:17:18,668 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-10-11 13:17:18,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-11 13:17:18,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-10-11 13:17:18,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:17:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:17:18,670 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:17:18,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:18,670 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:17:18,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:17:18,671 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:17:18,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:18,671 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:18,671 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:18,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-11 13:17:18,872 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:18,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-10-11 13:17:18,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:18,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908962317] [2020-10-11 13:17:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:19,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908962317] [2020-10-11 13:17:19,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55448393] [2020-10-11 13:17:19,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:19,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:17:19,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:19,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:19,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:19,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:19,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:17:19,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312159563] [2020-10-11 13:17:19,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:19,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:19,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:19,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:19,345 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:17:20,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:20,873 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-10-11 13:17:20,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 13:17:20,875 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:17:20,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:20,875 INFO L225 Difference]: With dead ends: 110 [2020-10-11 13:17:20,875 INFO L226 Difference]: Without dead ends: 104 [2020-10-11 13:17:20,876 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-10-11 13:17:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-11 13:17:20,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-10-11 13:17:20,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:17:20,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:17:20,878 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:17:20,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:20,878 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:17:20,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:17:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:20,879 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:20,879 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:21,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-11 13:17:21,080 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:21,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:21,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-10-11 13:17:21,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:21,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433515787] [2020-10-11 13:17:21,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:21,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433515787] [2020-10-11 13:17:21,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353114820] [2020-10-11 13:17:21,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:21,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:17:21,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:21,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:21,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:21,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:21,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:21,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:17:21,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289434102] [2020-10-11 13:17:21,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:17:21,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:21,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:17:21,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:17:21,564 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:17:23,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:23,453 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-10-11 13:17:23,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-11 13:17:23,455 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:17:23,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:23,455 INFO L225 Difference]: With dead ends: 109 [2020-10-11 13:17:23,455 INFO L226 Difference]: Without dead ends: 103 [2020-10-11 13:17:23,456 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-10-11 13:17:23,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-11 13:17:23,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-11 13:17:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:17:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:17:23,458 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:17:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:23,458 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:17:23,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:17:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:17:23,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:23,459 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:23,459 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:23,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-11 13:17:23,659 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:23,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-10-11 13:17:23,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:23,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276140303] [2020-10-11 13:17:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:24,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276140303] [2020-10-11 13:17:24,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835127037] [2020-10-11 13:17:24,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:24,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:24,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:24,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:24,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:17:24,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696390930] [2020-10-11 13:17:24,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:24,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:24,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:24,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:24,118 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:17:25,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:25,683 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-10-11 13:17:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 13:17:25,685 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:17:25,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:25,685 INFO L225 Difference]: With dead ends: 125 [2020-10-11 13:17:25,685 INFO L226 Difference]: Without dead ends: 119 [2020-10-11 13:17:25,685 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 13:17:25,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-11 13:17:25,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-10-11 13:17:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-11 13:17:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-10-11 13:17:25,687 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-10-11 13:17:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:25,687 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-10-11 13:17:25,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:25,687 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-10-11 13:17:25,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:25,688 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:25,688 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:25,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-11 13:17:25,888 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:25,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-10-11 13:17:25,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:25,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842435446] [2020-10-11 13:17:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:26,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842435446] [2020-10-11 13:17:26,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782197464] [2020-10-11 13:17:26,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:26,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:17:26,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:26,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:17:26,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:26,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:26,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:17:26,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706658509] [2020-10-11 13:17:26,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:17:26,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:26,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:17:26,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:17:26,372 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-10-11 13:17:28,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:28,136 INFO L93 Difference]: Finished difference Result 104 states and 261 transitions. [2020-10-11 13:17:28,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-11 13:17:28,137 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:17:28,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:28,138 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:17:28,138 INFO L226 Difference]: Without dead ends: 96 [2020-10-11 13:17:28,138 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1121, Invalid=2911, Unknown=0, NotChecked=0, Total=4032 [2020-10-11 13:17:28,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-11 13:17:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2020-10-11 13:17:28,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:17:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-10-11 13:17:28,140 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-10-11 13:17:28,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:28,140 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-10-11 13:17:28,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:17:28,140 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-10-11 13:17:28,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:28,141 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:28,141 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:28,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:28,342 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:28,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:28,342 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-10-11 13:17:28,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:28,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556247356] [2020-10-11 13:17:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:28,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556247356] [2020-10-11 13:17:28,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099742816] [2020-10-11 13:17:28,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:28,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:17:28,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:28,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:28,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:28,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:17:28,842 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:28,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:28,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:17:28,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825554022] [2020-10-11 13:17:28,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:17:28,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:28,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:17:28,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:17:28,844 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-10-11 13:17:30,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:30,657 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-10-11 13:17:30,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 13:17:30,659 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:17:30,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:30,659 INFO L225 Difference]: With dead ends: 124 [2020-10-11 13:17:30,659 INFO L226 Difference]: Without dead ends: 119 [2020-10-11 13:17:30,660 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-10-11 13:17:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-11 13:17:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-10-11 13:17:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-11 13:17:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-11 13:17:30,669 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-10-11 13:17:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:30,669 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-11 13:17:30,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:17:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-11 13:17:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:17:30,669 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:30,669 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:30,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-11 13:17:30,870 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:30,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:30,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-10-11 13:17:30,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:30,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888749551] [2020-10-11 13:17:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 72 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:31,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888749551] [2020-10-11 13:17:31,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494471094] [2020-10-11 13:17:31,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:31,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:17:31,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:31,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:17:31,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:31,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 13:17:31,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-10-11 13:17:31,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024571217] [2020-10-11 13:17:31,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:17:31,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:31,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:17:31,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:17:31,154 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 13 states. [2020-10-11 13:17:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:31,195 INFO L93 Difference]: Finished difference Result 421 states and 1013 transitions. [2020-10-11 13:17:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:17:31,196 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-11 13:17:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:31,197 INFO L225 Difference]: With dead ends: 421 [2020-10-11 13:17:31,197 INFO L226 Difference]: Without dead ends: 70 [2020-10-11 13:17:31,197 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:17:31,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-11 13:17:31,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-11 13:17:31,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:17:31,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 140 transitions. [2020-10-11 13:17:31,199 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 140 transitions. Word has length 29 [2020-10-11 13:17:31,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:31,199 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 140 transitions. [2020-10-11 13:17:31,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:17:31,199 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 140 transitions. [2020-10-11 13:17:31,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:17:31,199 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:31,199 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:31,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:31,404 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:31,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:31,405 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-10-11 13:17:31,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:31,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254976926] [2020-10-11 13:17:31,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:31,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254976926] [2020-10-11 13:17:31,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336525631] [2020-10-11 13:17:31,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:32,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-11 13:17:32,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:32,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:17:32,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:32,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 13:17:32,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [23] total 36 [2020-10-11 13:17:32,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968647437] [2020-10-11 13:17:32,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:17:32,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:32,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:17:32,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:17:32,574 INFO L87 Difference]: Start difference. First operand 70 states and 140 transitions. Second operand 13 states. [2020-10-11 13:17:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:32,633 INFO L93 Difference]: Finished difference Result 256 states and 475 transitions. [2020-10-11 13:17:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:17:32,635 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-11 13:17:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:32,636 INFO L225 Difference]: With dead ends: 256 [2020-10-11 13:17:32,636 INFO L226 Difference]: Without dead ends: 0 [2020-10-11 13:17:32,636 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:17:32,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-11 13:17:32,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-11 13:17:32,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-11 13:17:32,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-11 13:17:32,638 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-11 13:17:32,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:32,638 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-11 13:17:32,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:17:32,638 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-11 13:17:32,638 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-11 13:17:32,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:32,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 01:17:32 BasicIcfg [2020-10-11 13:17:32,843 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 13:17:32,845 INFO L168 Benchmark]: Toolchain (without parser) took 271193.34 ms. Allocated memory was 253.8 MB in the beginning and 291.5 MB in the end (delta: 37.7 MB). Free memory was 208.9 MB in the beginning and 175.0 MB in the end (delta: 33.9 MB). Peak memory consumption was 71.7 MB. Max. memory is 14.2 GB. [2020-10-11 13:17:32,847 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 253.8 MB. Free memory is still 230.1 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 13:17:32,848 INFO L168 Benchmark]: CACSL2BoogieTranslator took 662.66 ms. Allocated memory was 253.8 MB in the beginning and 321.4 MB in the end (delta: 67.6 MB). Free memory was 208.9 MB in the beginning and 277.1 MB in the end (delta: -68.2 MB). Peak memory consumption was 29.6 MB. Max. memory is 14.2 GB. [2020-10-11 13:17:32,849 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.62 ms. Allocated memory is still 321.4 MB. Free memory was 277.1 MB in the beginning and 274.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 13:17:32,849 INFO L168 Benchmark]: Boogie Preprocessor took 29.97 ms. Allocated memory is still 321.4 MB. Free memory is still 274.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 13:17:32,851 INFO L168 Benchmark]: RCFGBuilder took 390.24 ms. Allocated memory is still 321.4 MB. Free memory was 274.6 MB in the beginning and 252.8 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-11 13:17:32,852 INFO L168 Benchmark]: TraceAbstraction took 270054.34 ms. Allocated memory was 321.4 MB in the beginning and 291.5 MB in the end (delta: -29.9 MB). Free memory was 252.8 MB in the beginning and 175.0 MB in the end (delta: 77.8 MB). Peak memory consumption was 47.9 MB. Max. memory is 14.2 GB. [2020-10-11 13:17:32,854 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 253.8 MB. Free memory is still 230.1 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 662.66 ms. Allocated memory was 253.8 MB in the beginning and 321.4 MB in the end (delta: 67.6 MB). Free memory was 208.9 MB in the beginning and 277.1 MB in the end (delta: -68.2 MB). Peak memory consumption was 29.6 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 48.62 ms. Allocated memory is still 321.4 MB. Free memory was 277.1 MB in the beginning and 274.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 29.97 ms. Allocated memory is still 321.4 MB. Free memory is still 274.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 390.24 ms. Allocated memory is still 321.4 MB. Free memory was 274.6 MB in the beginning and 252.8 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 270054.34 ms. Allocated memory was 321.4 MB in the beginning and 291.5 MB in the end (delta: -29.9 MB). Free memory was 252.8 MB in the beginning and 175.0 MB in the end (delta: 77.8 MB). Peak memory consumption was 47.9 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - 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, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 269.9s, OverallIterations: 241, TraceHistogramMax: 11, AutomataDifference: 153.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 3935 SDtfs, 13973 SDslu, 25157 SDs, 0 SdLazy, 27289 SolverSat, 16264 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13658 GetRequests, 4494 SyntacticMatches, 234 SemanticMatches, 8930 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91491 ImplicationChecksByTransitivity, 159.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=237, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 241 MinimizatonAttempts, 6070 StatesRemovedByMinimization, 238 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 52.1s InterpolantComputationTime, 10246 NumberOfCodeBlocks, 10244 NumberOfCodeBlocksAsserted, 1270 NumberOfCheckSat, 9769 ConstructedInterpolants, 0 QuantifiedInterpolants, 956995 SizeOfPredicates, 3171 NumberOfNonLiveVariables, 31166 ConjunctsInSsa, 4133 ConjunctsInUnsatCore, 477 InterpolantComputations, 7 PerfectInterpolantSequences, 272/21430 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...