/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c7e336b [2020-10-05 22:21:46,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-05 22:21:46,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-05 22:21:46,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-05 22:21:46,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-05 22:21:46,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-05 22:21:46,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-05 22:21:46,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-05 22:21:46,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-05 22:21:46,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-05 22:21:46,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-05 22:21:46,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-05 22:21:46,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-05 22:21:46,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-05 22:21:46,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-05 22:21:46,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-05 22:21:46,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-05 22:21:46,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-05 22:21:46,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-05 22:21:46,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-05 22:21:46,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-05 22:21:46,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-05 22:21:46,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-05 22:21:46,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-05 22:21:46,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-05 22:21:46,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-05 22:21:46,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-05 22:21:46,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-05 22:21:46,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-05 22:21:46,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-05 22:21:46,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-05 22:21:46,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-05 22:21:46,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-05 22:21:46,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-05 22:21:46,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-05 22:21:46,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-05 22:21:46,277 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 [2020-10-05 22:21:46,333 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-05 22:21:46,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-05 22:21:46,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-05 22:21:46,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-05 22:21:46,338 INFO L138 SettingsManager]: * Use SBE=true [2020-10-05 22:21:46,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-05 22:21:46,339 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-05 22:21:46,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-05 22:21:46,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-05 22:21:46,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-05 22:21:46,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-05 22:21:46,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-05 22:21:46,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-05 22:21:46,340 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-05 22:21:46,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-05 22:21:46,340 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-05 22:21:46,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-05 22:21:46,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-05 22:21:46,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-05 22:21:46,343 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-05 22:21:46,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-05 22:21:46,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 22:21:46,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-05 22:21:46,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-05 22:21:46,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-05 22:21:46,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-05 22:21:46,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-05 22:21:46,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-05 22:21:46,345 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-05 22:21:46,345 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-05 22:21:46,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-05 22:21:46,714 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-05 22:21:46,718 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-05 22:21:46,720 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-05 22:21:46,720 INFO L275 PluginConnector]: CDTParser initialized [2020-10-05 22:21:46,721 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2020-10-05 22:21:46,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c2ecb786/915fa025742f44bfab8158a6c3984696/FLAG9279c4b3a [2020-10-05 22:21:47,367 INFO L306 CDTParser]: Found 1 translation units. [2020-10-05 22:21:47,368 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2020-10-05 22:21:47,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c2ecb786/915fa025742f44bfab8158a6c3984696/FLAG9279c4b3a [2020-10-05 22:21:47,674 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c2ecb786/915fa025742f44bfab8158a6c3984696 [2020-10-05 22:21:47,683 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-05 22:21:47,685 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-05 22:21:47,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-05 22:21:47,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-05 22:21:47,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-05 22:21:47,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:21:47" (1/1) ... [2020-10-05 22:21:47,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@493554a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:47, skipping insertion in model container [2020-10-05 22:21:47,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:21:47" (1/1) ... [2020-10-05 22:21:47,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-05 22:21:47,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-05 22:21:48,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 22:21:48,303 INFO L203 MainTranslator]: Completed pre-run [2020-10-05 22:21:48,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 22:21:48,419 INFO L208 MainTranslator]: Completed translation [2020-10-05 22:21:48,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48 WrapperNode [2020-10-05 22:21:48,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-05 22:21:48,421 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-05 22:21:48,421 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-05 22:21:48,421 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-05 22:21:48,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-05 22:21:48,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-05 22:21:48,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-05 22:21:48,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-05 22:21:48,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-05 22:21:48,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-05 22:21:48,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-05 22:21:48,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-05 22:21:48,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (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 [2020-10-05 22:21:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-05 22:21:48,592 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-05 22:21:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-05 22:21:48,592 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-05 22:21:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-05 22:21:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-05 22:21:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-05 22:21:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-05 22:21:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-05 22:21:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-05 22:21:48,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-05 22:21:48,598 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-05 22:21:48,946 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-05 22:21:48,946 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-05 22:21:48,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:21:48 BoogieIcfgContainer [2020-10-05 22:21:48,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-05 22:21:48,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-05 22:21:48,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-05 22:21:48,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-05 22:21:48,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 10:21:47" (1/3) ... [2020-10-05 22:21:48,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33263dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:21:48, skipping insertion in model container [2020-10-05 22:21:48,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (2/3) ... [2020-10-05 22:21:48,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33263dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:21:48, skipping insertion in model container [2020-10-05 22:21:48,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:21:48" (3/3) ... [2020-10-05 22:21:48,960 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-10-05 22:21:48,972 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-05 22:21:48,972 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-05 22:21:48,980 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-05 22:21:48,982 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-05 22:21:49,020 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,021 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,021 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,021 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,022 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,022 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,023 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,023 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,023 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,024 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,024 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,024 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,025 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,025 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,025 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,026 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,026 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,026 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,027 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,027 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,028 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,028 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,028 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,029 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,029 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,029 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,029 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,030 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,034 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,034 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,035 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,035 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,035 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,035 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,041 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,042 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,042 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,042 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,043 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,043 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:49,058 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-05 22:21:49,080 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 22:21:49,081 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 22:21:49,081 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-05 22:21:49,081 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 22:21:49,081 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 22:21:49,081 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 22:21:49,082 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 22:21:49,082 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 22:21:49,099 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-05 22:21:49,101 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-05 22:21:49,145 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-05 22:21:49,145 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-05 22:21:49,152 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. [2020-10-05 22:21:49,155 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-05 22:21:49,179 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-05 22:21:49,179 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-05 22:21:49,180 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. [2020-10-05 22:21:49,186 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-10-05 22:21:49,188 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-10-05 22:21:50,221 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-05 22:21:50,455 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-10-05 22:21:50,455 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-10-05 22:21:50,460 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-05 22:21:50,471 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-05 22:21:50,474 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-05 22:21:50,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-05 22:21:50,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:50,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-05 22:21:50,483 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:50,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-05 22:21:50,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:50,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760525818] [2020-10-05 22:21:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:50,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760525818] [2020-10-05 22:21:50,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:21:50,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 22:21:50,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959288034] [2020-10-05 22:21:50,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 22:21:50,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:50,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 22:21:50,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-05 22:21:50,771 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-05 22:21:50,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:50,873 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-05 22:21:50,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 22:21:50,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-05 22:21:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:50,893 INFO L225 Difference]: With dead ends: 75 [2020-10-05 22:21:50,893 INFO L226 Difference]: Without dead ends: 42 [2020-10-05 22:21:50,894 INFO L675 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 [2020-10-05 22:21:50,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-05 22:21:50,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-05 22:21:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 22:21:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-05 22:21:50,946 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-05 22:21:50,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:50,947 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-05 22:21:50,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 22:21:50,947 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-05 22:21:50,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-05 22:21:50,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:50,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:50,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-05 22:21:50,949 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:50,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:50,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-05 22:21:50,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:50,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767766449] [2020-10-05 22:21:50,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:51,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767766449] [2020-10-05 22:21:51,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:21:51,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 22:21:51,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464383566] [2020-10-05 22:21:51,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 22:21:51,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:51,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 22:21:51,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-05 22:21:51,038 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-05 22:21:51,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:51,070 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-05 22:21:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 22:21:51,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-05 22:21:51,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:51,072 INFO L225 Difference]: With dead ends: 56 [2020-10-05 22:21:51,072 INFO L226 Difference]: Without dead ends: 50 [2020-10-05 22:21:51,073 INFO L675 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 [2020-10-05 22:21:51,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-05 22:21:51,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-05 22:21:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 22:21:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-05 22:21:51,081 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-05 22:21:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:51,082 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-05 22:21:51,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 22:21:51,083 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-05 22:21:51,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:21:51,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:51,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:51,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-05 22:21:51,084 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:51,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:51,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-05 22:21:51,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:51,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801791212] [2020-10-05 22:21:51,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:51,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801791212] [2020-10-05 22:21:51,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:21:51,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:21:51,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633421668] [2020-10-05 22:21:51,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:21:51,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:51,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:21:51,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:21:51,181 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-05 22:21:51,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:51,258 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-05 22:21:51,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:21:51,259 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:21:51,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:51,260 INFO L225 Difference]: With dead ends: 78 [2020-10-05 22:21:51,261 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 22:21:51,261 INFO L675 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 [2020-10-05 22:21:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 22:21:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-05 22:21:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:21:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-05 22:21:51,270 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-05 22:21:51,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:51,271 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-05 22:21:51,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:21:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-05 22:21:51,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:21:51,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:51,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:51,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-05 22:21:51,273 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:51,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-05 22:21:51,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:51,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051108425] [2020-10-05 22:21:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:51,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051108425] [2020-10-05 22:21:51,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:21:51,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:21:51,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503314698] [2020-10-05 22:21:51,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:21:51,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:51,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:21:51,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:21:51,403 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-05 22:21:51,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:51,498 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-05 22:21:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:21:51,500 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:21:51,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:51,501 INFO L225 Difference]: With dead ends: 54 [2020-10-05 22:21:51,501 INFO L226 Difference]: Without dead ends: 43 [2020-10-05 22:21:51,501 INFO L675 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 [2020-10-05 22:21:51,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-05 22:21:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-05 22:21:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-05 22:21:51,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-05 22:21:51,508 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-05 22:21:51,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:51,509 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-05 22:21:51,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:21:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-05 22:21:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:21:51,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:51,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:51,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-05 22:21:51,510 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:51,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:51,511 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-05 22:21:51,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:51,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543276781] [2020-10-05 22:21:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:51,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543276781] [2020-10-05 22:21:51,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:21:51,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:21:51,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375286270] [2020-10-05 22:21:51,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:21:51,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:21:51,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:21:51,564 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-05 22:21:51,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:51,636 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-05 22:21:51,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:21:51,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:21:51,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:51,637 INFO L225 Difference]: With dead ends: 57 [2020-10-05 22:21:51,638 INFO L226 Difference]: Without dead ends: 51 [2020-10-05 22:21:51,638 INFO L675 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 [2020-10-05 22:21:51,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-05 22:21:51,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-05 22:21:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-05 22:21:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-05 22:21:51,643 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-05 22:21:51,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:51,644 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-05 22:21:51,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:21:51,644 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-05 22:21:51,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:21:51,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:51,645 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:51,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-05 22:21:51,645 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:51,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:51,646 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-05 22:21:51,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:51,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486648402] [2020-10-05 22:21:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:51,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486648402] [2020-10-05 22:21:51,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348331834] [2020-10-05 22:21:51,760 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 [2020-10-05 22:21:51,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:21:51,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:51,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:21:51,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:51,879 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:21:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:51,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:51,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 22:21:51,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574934436] [2020-10-05 22:21:51,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:21:51,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:51,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:21:51,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-05 22:21:51,896 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-05 22:21:52,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:52,007 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-05 22:21:52,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:21:52,007 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-05 22:21:52,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:52,008 INFO L225 Difference]: With dead ends: 48 [2020-10-05 22:21:52,008 INFO L226 Difference]: Without dead ends: 43 [2020-10-05 22:21:52,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:21:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-05 22:21:52,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-05 22:21:52,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-05 22:21:52,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-05 22:21:52,014 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-05 22:21:52,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:52,014 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-05 22:21:52,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:21:52,014 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-05 22:21:52,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:21:52,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:52,015 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:52,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-05 22:21:52,226 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:52,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:52,227 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-05 22:21:52,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:52,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222656230] [2020-10-05 22:21:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:52,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222656230] [2020-10-05 22:21:52,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402609474] [2020-10-05 22:21:52,304 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 [2020-10-05 22:21:52,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:52,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:52,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:21:52,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:52,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:52,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-05 22:21:52,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794517505] [2020-10-05 22:21:52,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 22:21:52,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:52,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 22:21:52,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-05 22:21:52,372 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-05 22:21:52,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:52,443 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-05 22:21:52,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:21:52,444 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-05 22:21:52,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:52,445 INFO L225 Difference]: With dead ends: 54 [2020-10-05 22:21:52,445 INFO L226 Difference]: Without dead ends: 48 [2020-10-05 22:21:52,445 INFO L675 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 [2020-10-05 22:21:52,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-05 22:21:52,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-05 22:21:52,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 22:21:52,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-05 22:21:52,450 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-05 22:21:52,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:52,451 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-05 22:21:52,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 22:21:52,451 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-05 22:21:52,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:21:52,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:52,452 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:52,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:52,665 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:52,666 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-05 22:21:52,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:52,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182715357] [2020-10-05 22:21:52,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:52,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182715357] [2020-10-05 22:21:52,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963891572] [2020-10-05 22:21:52,741 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 [2020-10-05 22:21:52,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:21:52,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:52,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:21:52,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:52,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:52,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:52,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 22:21:52,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371222778] [2020-10-05 22:21:52,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:21:52,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:52,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:21:52,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-05 22:21:52,831 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-05 22:21:52,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:52,957 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-05 22:21:52,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:21:52,958 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-05 22:21:52,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:52,958 INFO L225 Difference]: With dead ends: 58 [2020-10-05 22:21:52,958 INFO L226 Difference]: Without dead ends: 52 [2020-10-05 22:21:52,959 INFO L675 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 [2020-10-05 22:21:52,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-05 22:21:52,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-05 22:21:52,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-05 22:21:52,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-05 22:21:52,969 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-05 22:21:52,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:52,986 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-05 22:21:52,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:21:52,986 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-05 22:21:52,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:21:52,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:52,989 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:53,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:53,200 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:53,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:53,201 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-05 22:21:53,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:53,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547964662] [2020-10-05 22:21:53,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:53,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547964662] [2020-10-05 22:21:53,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971038125] [2020-10-05 22:21:53,254 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 [2020-10-05 22:21:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:53,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:21:53,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:53,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:53,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-05 22:21:53,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253615249] [2020-10-05 22:21:53,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 22:21:53,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:53,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 22:21:53,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-05 22:21:53,325 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-05 22:21:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:53,444 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-05 22:21:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:21:53,444 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-05 22:21:53,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:53,445 INFO L225 Difference]: With dead ends: 78 [2020-10-05 22:21:53,445 INFO L226 Difference]: Without dead ends: 72 [2020-10-05 22:21:53,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:21:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-05 22:21:53,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-05 22:21:53,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:21:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-05 22:21:53,452 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-05 22:21:53,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:53,452 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-05 22:21:53,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 22:21:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-05 22:21:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:21:53,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:53,453 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:53,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:53,665 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:53,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:53,666 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-05 22:21:53,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:53,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711849338] [2020-10-05 22:21:53,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:53,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711849338] [2020-10-05 22:21:53,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016874456] [2020-10-05 22:21:53,716 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 [2020-10-05 22:21:53,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:53,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:53,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:21:53,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:53,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:53,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:53,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 22:21:53,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113269589] [2020-10-05 22:21:53,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:21:53,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:53,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:21:53,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-05 22:21:53,804 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-05 22:21:53,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:53,970 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-05 22:21:53,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:21:53,972 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-05 22:21:53,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:53,973 INFO L225 Difference]: With dead ends: 62 [2020-10-05 22:21:53,973 INFO L226 Difference]: Without dead ends: 54 [2020-10-05 22:21:53,974 INFO L675 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 [2020-10-05 22:21:53,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-05 22:21:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-05 22:21:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-05 22:21:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-05 22:21:53,980 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-05 22:21:53,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:53,983 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-05 22:21:53,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:21:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-05 22:21:53,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:21:53,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:53,984 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:54,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-05 22:21:54,195 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:54,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-05 22:21:54,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:54,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066072117] [2020-10-05 22:21:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:54,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066072117] [2020-10-05 22:21:54,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009707644] [2020-10-05 22:21:54,259 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 [2020-10-05 22:21:54,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:21:54,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:54,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:21:54,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:54,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:54,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-05 22:21:54,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912452090] [2020-10-05 22:21:54,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:21:54,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:54,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:21:54,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-05 22:21:54,325 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-05 22:21:54,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:54,434 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-05 22:21:54,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:21:54,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-05 22:21:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:54,435 INFO L225 Difference]: With dead ends: 64 [2020-10-05 22:21:54,435 INFO L226 Difference]: Without dead ends: 58 [2020-10-05 22:21:54,436 INFO L675 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 [2020-10-05 22:21:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-05 22:21:54,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-05 22:21:54,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-05 22:21:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-05 22:21:54,443 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-05 22:21:54,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:54,448 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-05 22:21:54,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:21:54,448 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-05 22:21:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:21:54,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:54,449 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:54,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:54,650 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:54,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:54,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-05 22:21:54,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:54,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431764325] [2020-10-05 22:21:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:54,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431764325] [2020-10-05 22:21:54,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803293383] [2020-10-05 22:21:54,735 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 [2020-10-05 22:21:54,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:21:54,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:54,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:21:54,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:54,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:54,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:54,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 22:21:54,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448819447] [2020-10-05 22:21:54,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:21:54,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:54,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:21:54,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:54,826 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-05 22:21:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:54,989 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-05 22:21:54,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:21:54,990 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-05 22:21:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:54,991 INFO L225 Difference]: With dead ends: 61 [2020-10-05 22:21:54,991 INFO L226 Difference]: Without dead ends: 55 [2020-10-05 22:21:54,991 INFO L675 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 [2020-10-05 22:21:54,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-05 22:21:54,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-05 22:21:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-05 22:21:54,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-05 22:21:54,999 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-05 22:21:54,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:54,999 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-05 22:21:54,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:21:54,999 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-05 22:21:55,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:21:55,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:55,001 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:55,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:55,202 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:55,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:55,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-05 22:21:55,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:55,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67339739] [2020-10-05 22:21:55,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:55,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67339739] [2020-10-05 22:21:55,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678488751] [2020-10-05 22:21:55,278 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 [2020-10-05 22:21:55,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:55,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:55,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:21:55,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:55,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:55,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-05 22:21:55,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818395949] [2020-10-05 22:21:55,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:21:55,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:55,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:21:55,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-05 22:21:55,349 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-05 22:21:55,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:55,507 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-05 22:21:55,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:21:55,509 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-05 22:21:55,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:55,510 INFO L225 Difference]: With dead ends: 77 [2020-10-05 22:21:55,510 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 22:21:55,510 INFO L675 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 [2020-10-05 22:21:55,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 22:21:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-05 22:21:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-05 22:21:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-05 22:21:55,518 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-05 22:21:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:55,518 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-05 22:21:55,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:21:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-05 22:21:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:21:55,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:55,519 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:55,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-05 22:21:55,724 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:55,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:55,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-05 22:21:55,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:55,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111970650] [2020-10-05 22:21:55,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:55,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111970650] [2020-10-05 22:21:55,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457493046] [2020-10-05 22:21:55,781 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 [2020-10-05 22:21:55,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:21:55,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:55,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:21:55,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:55,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:55,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:55,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 22:21:55,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810172599] [2020-10-05 22:21:55,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:21:55,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:55,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:21:55,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:55,855 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-05 22:21:56,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:56,090 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-05 22:21:56,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:21:56,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-05 22:21:56,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:56,091 INFO L225 Difference]: With dead ends: 58 [2020-10-05 22:21:56,091 INFO L226 Difference]: Without dead ends: 50 [2020-10-05 22:21:56,091 INFO L675 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 [2020-10-05 22:21:56,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-05 22:21:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-05 22:21:56,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-05 22:21:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-05 22:21:56,095 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-05 22:21:56,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:56,095 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-05 22:21:56,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:21:56,095 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-05 22:21:56,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:21:56,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:56,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:56,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:56,307 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:56,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:56,308 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-05 22:21:56,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:56,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438065320] [2020-10-05 22:21:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:56,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438065320] [2020-10-05 22:21:56,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497644469] [2020-10-05 22:21:56,389 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 [2020-10-05 22:21:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:56,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:21:56,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:56,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:21:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:56,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:56,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 22:21:56,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707138255] [2020-10-05 22:21:56,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:21:56,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:56,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:21:56,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:56,472 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-05 22:21:56,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:56,651 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-05 22:21:56,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:21:56,652 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-05 22:21:56,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:56,653 INFO L225 Difference]: With dead ends: 60 [2020-10-05 22:21:56,653 INFO L226 Difference]: Without dead ends: 55 [2020-10-05 22:21:56,653 INFO L675 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 [2020-10-05 22:21:56,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-05 22:21:56,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-05 22:21:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:21:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-05 22:21:56,656 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-05 22:21:56,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:56,656 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-05 22:21:56,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:21:56,657 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-05 22:21:56,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:56,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:56,657 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:56,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-05 22:21:56,868 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:56,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:56,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-05 22:21:56,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:56,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732832668] [2020-10-05 22:21:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:56,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732832668] [2020-10-05 22:21:56,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525919103] [2020-10-05 22:21:56,927 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 [2020-10-05 22:21:56,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:56,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:56,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:21:56,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:57,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:21:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:57,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:57,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 22:21:57,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620042386] [2020-10-05 22:21:57,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:21:57,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:57,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:21:57,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:21:57,011 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-05 22:21:57,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:57,220 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-05 22:21:57,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:21:57,221 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 22:21:57,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:57,221 INFO L225 Difference]: With dead ends: 54 [2020-10-05 22:21:57,221 INFO L226 Difference]: Without dead ends: 49 [2020-10-05 22:21:57,222 INFO L675 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 [2020-10-05 22:21:57,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-05 22:21:57,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-05 22:21:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-05 22:21:57,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-05 22:21:57,225 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-05 22:21:57,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:57,225 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-05 22:21:57,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:21:57,225 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-05 22:21:57,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:57,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:57,226 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:57,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-05 22:21:57,427 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:57,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-05 22:21:57,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:57,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826858912] [2020-10-05 22:21:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:57,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826858912] [2020-10-05 22:21:57,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801566502] [2020-10-05 22:21:57,520 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 [2020-10-05 22:21:57,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:21:57,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:57,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:21:57,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:57,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:57,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-05 22:21:57,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945581989] [2020-10-05 22:21:57,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:21:57,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:57,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:21:57,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:57,585 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-05 22:21:57,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:57,701 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-05 22:21:57,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:21:57,702 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-05 22:21:57,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:57,702 INFO L225 Difference]: With dead ends: 60 [2020-10-05 22:21:57,702 INFO L226 Difference]: Without dead ends: 54 [2020-10-05 22:21:57,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:21:57,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-05 22:21:57,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-05 22:21:57,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:21:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-05 22:21:57,706 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-05 22:21:57,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:57,706 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-05 22:21:57,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:21:57,707 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-05 22:21:57,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:57,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:57,707 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:57,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-05 22:21:57,918 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:57,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:57,919 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-05 22:21:57,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:57,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124219734] [2020-10-05 22:21:57,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:57,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124219734] [2020-10-05 22:21:57,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436128977] [2020-10-05 22:21:57,993 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 [2020-10-05 22:21:58,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:21:58,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:58,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:21:58,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:58,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:58,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:58,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 22:21:58,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764769814] [2020-10-05 22:21:58,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:21:58,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:58,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:21:58,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:21:58,100 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-05 22:21:58,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:58,242 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-05 22:21:58,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:21:58,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 22:21:58,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:58,243 INFO L225 Difference]: With dead ends: 66 [2020-10-05 22:21:58,244 INFO L226 Difference]: Without dead ends: 60 [2020-10-05 22:21:58,244 INFO L675 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 [2020-10-05 22:21:58,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-05 22:21:58,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-05 22:21:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-05 22:21:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-05 22:21:58,247 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-05 22:21:58,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:58,247 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-05 22:21:58,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:21:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-05 22:21:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:58,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:58,248 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:58,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-05 22:21:58,458 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:58,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:58,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-05 22:21:58,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:58,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050009202] [2020-10-05 22:21:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:58,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050009202] [2020-10-05 22:21:58,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396867167] [2020-10-05 22:21:58,523 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 [2020-10-05 22:21:58,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:21:58,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:58,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:21:58,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:58,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:58,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-05 22:21:58,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314978834] [2020-10-05 22:21:58,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:21:58,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:58,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:21:58,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:58,602 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-05 22:21:58,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:58,762 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-05 22:21:58,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:21:58,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-05 22:21:58,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:58,764 INFO L225 Difference]: With dead ends: 67 [2020-10-05 22:21:58,764 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 22:21:58,764 INFO L675 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 [2020-10-05 22:21:58,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 22:21:58,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-05 22:21:58,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-05 22:21:58,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-05 22:21:58,773 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-05 22:21:58,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:58,773 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-05 22:21:58,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:21:58,773 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-05 22:21:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:58,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:58,774 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:58,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:58,974 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:58,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:58,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-05 22:21:58,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:58,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063122321] [2020-10-05 22:21:58,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:59,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063122321] [2020-10-05 22:21:59,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872260315] [2020-10-05 22:21:59,045 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 [2020-10-05 22:21:59,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:21:59,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:59,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:21:59,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:59,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:59,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:59,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 22:21:59,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738428454] [2020-10-05 22:21:59,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:21:59,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:59,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:21:59,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:21:59,121 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-05 22:21:59,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:59,341 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-05 22:21:59,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:21:59,346 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 22:21:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:59,347 INFO L225 Difference]: With dead ends: 69 [2020-10-05 22:21:59,347 INFO L226 Difference]: Without dead ends: 63 [2020-10-05 22:21:59,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:21:59,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-05 22:21:59,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-05 22:21:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:21:59,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-05 22:21:59,351 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-05 22:21:59,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:59,351 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-05 22:21:59,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:21:59,351 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-05 22:21:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:59,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:59,352 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:59,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:59,561 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:59,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:59,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-05 22:21:59,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:59,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960007094] [2020-10-05 22:21:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:59,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960007094] [2020-10-05 22:21:59,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681744315] [2020-10-05 22:21:59,616 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 [2020-10-05 22:21:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:59,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:21:59,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:59,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:59,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-05 22:21:59,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691633645] [2020-10-05 22:21:59,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:21:59,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:59,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:21:59,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:59,685 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-05 22:21:59,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:59,862 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-05 22:21:59,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:21:59,865 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-05 22:21:59,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:59,866 INFO L225 Difference]: With dead ends: 88 [2020-10-05 22:21:59,866 INFO L226 Difference]: Without dead ends: 82 [2020-10-05 22:21:59,866 INFO L675 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 [2020-10-05 22:21:59,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-05 22:21:59,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-05 22:21:59,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 22:21:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-05 22:21:59,869 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-05 22:21:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:59,870 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-05 22:21:59,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:21:59,870 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-05 22:21:59,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:59,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:59,871 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:00,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:00,073 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:00,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-05 22:22:00,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:00,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86436621] [2020-10-05 22:22:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:00,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86436621] [2020-10-05 22:22:00,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707533524] [2020-10-05 22:22:00,137 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 [2020-10-05 22:22:00,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:00,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:00,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:00,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:00,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:00,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 22:22:00,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696821692] [2020-10-05 22:22:00,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:22:00,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:00,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:22:00,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:00,211 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-05 22:22:00,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:00,445 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-05 22:22:00,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:22:00,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 22:22:00,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:00,446 INFO L225 Difference]: With dead ends: 69 [2020-10-05 22:22:00,446 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 22:22:00,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:22:00,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 22:22:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-05 22:22:00,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-05 22:22:00,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-05 22:22:00,452 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-05 22:22:00,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:00,452 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-05 22:22:00,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:22:00,452 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-05 22:22:00,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:00,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:00,453 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:00,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-05 22:22:00,653 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:00,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:00,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-05 22:22:00,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:00,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439037705] [2020-10-05 22:22:00,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:00,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439037705] [2020-10-05 22:22:00,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711087577] [2020-10-05 22:22:00,741 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 [2020-10-05 22:22:00,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:22:00,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:00,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:00,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:00,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:00,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-05 22:22:00,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877847136] [2020-10-05 22:22:00,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:22:00,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:00,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:22:00,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:00,816 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-05 22:22:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:00,966 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-05 22:22:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:22:00,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-05 22:22:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:00,967 INFO L225 Difference]: With dead ends: 74 [2020-10-05 22:22:00,968 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 22:22:00,968 INFO L675 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 [2020-10-05 22:22:00,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 22:22:00,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-05 22:22:00,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-05 22:22:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-05 22:22:00,971 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-05 22:22:00,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:00,971 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-05 22:22:00,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:22:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-05 22:22:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:00,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:00,972 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:01,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-05 22:22:01,173 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:01,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:01,173 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-05 22:22:01,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:01,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331276005] [2020-10-05 22:22:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:01,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331276005] [2020-10-05 22:22:01,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700868039] [2020-10-05 22:22:01,261 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 [2020-10-05 22:22:01,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:01,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:01,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:01,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:01,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:01,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:01,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 22:22:01,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415139956] [2020-10-05 22:22:01,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:01,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:01,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:01,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:01,346 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-05 22:22:01,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:01,548 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-05 22:22:01,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:22:01,548 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 22:22:01,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:01,549 INFO L225 Difference]: With dead ends: 71 [2020-10-05 22:22:01,550 INFO L226 Difference]: Without dead ends: 65 [2020-10-05 22:22:01,550 INFO L675 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 [2020-10-05 22:22:01,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-05 22:22:01,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-05 22:22:01,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 22:22:01,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-05 22:22:01,553 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-05 22:22:01,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:01,553 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-05 22:22:01,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:01,553 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-05 22:22:01,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:01,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:01,554 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:01,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-05 22:22:01,755 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:01,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:01,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-05 22:22:01,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:01,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158089646] [2020-10-05 22:22:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:01,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158089646] [2020-10-05 22:22:01,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735240573] [2020-10-05 22:22:01,821 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 [2020-10-05 22:22:01,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:22:01,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:01,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:01,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:01,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:01,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-05 22:22:01,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702142049] [2020-10-05 22:22:01,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:22:01,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:01,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:22:01,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:01,895 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-05 22:22:02,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:02,077 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-05 22:22:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:22:02,077 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-05 22:22:02,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:02,078 INFO L225 Difference]: With dead ends: 68 [2020-10-05 22:22:02,079 INFO L226 Difference]: Without dead ends: 62 [2020-10-05 22:22:02,079 INFO L675 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 [2020-10-05 22:22:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-05 22:22:02,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-05 22:22:02,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-05 22:22:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-05 22:22:02,082 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-05 22:22:02,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:02,082 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-05 22:22:02,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:22:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-05 22:22:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:02,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:02,083 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:02,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-05 22:22:02,292 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:02,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:02,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-05 22:22:02,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:02,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122407723] [2020-10-05 22:22:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:02,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122407723] [2020-10-05 22:22:02,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290649059] [2020-10-05 22:22:02,365 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 [2020-10-05 22:22:02,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:22:02,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:02,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:02,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:02,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:02,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:02,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 22:22:02,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519324021] [2020-10-05 22:22:02,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:02,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:02,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:02,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:02,447 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-05 22:22:02,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:02,715 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-05 22:22:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:22:02,716 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 22:22:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:02,717 INFO L225 Difference]: With dead ends: 67 [2020-10-05 22:22:02,717 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 22:22:02,717 INFO L675 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 [2020-10-05 22:22:02,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 22:22:02,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-05 22:22:02,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 22:22:02,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-05 22:22:02,722 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-05 22:22:02,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:02,722 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-05 22:22:02,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:02,722 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-05 22:22:02,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:02,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:02,723 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:02,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-05 22:22:02,924 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:02,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:02,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-05 22:22:02,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:02,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611607658] [2020-10-05 22:22:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:02,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611607658] [2020-10-05 22:22:02,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000297621] [2020-10-05 22:22:02,985 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 [2020-10-05 22:22:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:03,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:03,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:03,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:03,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-05 22:22:03,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560774860] [2020-10-05 22:22:03,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:22:03,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:03,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:22:03,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:03,070 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-05 22:22:03,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:03,271 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-05 22:22:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:03,272 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-05 22:22:03,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:03,273 INFO L225 Difference]: With dead ends: 83 [2020-10-05 22:22:03,273 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 22:22:03,274 INFO L675 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 [2020-10-05 22:22:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 22:22:03,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-05 22:22:03,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 22:22:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-05 22:22:03,278 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-05 22:22:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:03,278 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-05 22:22:03,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:22:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-05 22:22:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:03,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:03,279 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:03,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:03,491 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:03,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:03,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-05 22:22:03,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:03,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760383955] [2020-10-05 22:22:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:03,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760383955] [2020-10-05 22:22:03,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952606373] [2020-10-05 22:22:03,547 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 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 [2020-10-05 22:22:03,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:03,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:03,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:03,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:03,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:03,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:03,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 22:22:03,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629061413] [2020-10-05 22:22:03,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:03,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:03,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:03,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:03,647 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-05 22:22:03,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:03,952 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-05 22:22:03,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:22:03,953 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 22:22:03,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:03,953 INFO L225 Difference]: With dead ends: 64 [2020-10-05 22:22:03,953 INFO L226 Difference]: Without dead ends: 56 [2020-10-05 22:22:03,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:22:03,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-05 22:22:03,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-10-05 22:22:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-05 22:22:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-05 22:22:03,956 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-05 22:22:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:03,956 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-05 22:22:03,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-05 22:22:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:03,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:03,957 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:04,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-05 22:22:04,166 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:04,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-05 22:22:04,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:04,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384718586] [2020-10-05 22:22:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:04,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384718586] [2020-10-05 22:22:04,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007515849] [2020-10-05 22:22:04,234 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 [2020-10-05 22:22:04,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:22:04,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:04,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:04,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:04,305 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:04,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:04,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 22:22:04,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959452041] [2020-10-05 22:22:04,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:04,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:04,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:04,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:04,316 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-05 22:22:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:04,600 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-05 22:22:04,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:04,601 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 22:22:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:04,602 INFO L225 Difference]: With dead ends: 68 [2020-10-05 22:22:04,602 INFO L226 Difference]: Without dead ends: 63 [2020-10-05 22:22:04,603 INFO L675 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 [2020-10-05 22:22:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-05 22:22:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-05 22:22:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 22:22:04,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-05 22:22:04,605 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-05 22:22:04,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:04,606 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-05 22:22:04,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:04,606 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-05 22:22:04,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:04,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:04,606 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:04,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-05 22:22:04,807 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:04,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:04,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-05 22:22:04,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:04,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357637130] [2020-10-05 22:22:04,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:04,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357637130] [2020-10-05 22:22:04,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020162619] [2020-10-05 22:22:04,889 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 [2020-10-05 22:22:04,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:04,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:04,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:04,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:04,957 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:04,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:04,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 22:22:04,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52169518] [2020-10-05 22:22:04,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:04,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:04,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:04,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:04,975 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-05 22:22:05,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:05,273 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-05 22:22:05,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:05,274 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 22:22:05,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:05,275 INFO L225 Difference]: With dead ends: 60 [2020-10-05 22:22:05,275 INFO L226 Difference]: Without dead ends: 55 [2020-10-05 22:22:05,276 INFO L675 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 [2020-10-05 22:22:05,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-05 22:22:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-05 22:22:05,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 22:22:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-05 22:22:05,278 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-05 22:22:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:05,279 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-05 22:22:05,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-05 22:22:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:05,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:05,279 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:05,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:05,488 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:05,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:05,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-05 22:22:05,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:05,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407774276] [2020-10-05 22:22:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:05,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407774276] [2020-10-05 22:22:05,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077621356] [2020-10-05 22:22:05,567 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 [2020-10-05 22:22:05,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-05 22:22:05,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:05,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:05,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:05,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:05,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 22:22:05,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182612547] [2020-10-05 22:22:05,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:05,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:05,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:05,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:05,644 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-05 22:22:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:05,784 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-05 22:22:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:22:05,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 22:22:05,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:05,786 INFO L225 Difference]: With dead ends: 66 [2020-10-05 22:22:05,786 INFO L226 Difference]: Without dead ends: 60 [2020-10-05 22:22:05,787 INFO L675 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 [2020-10-05 22:22:05,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-05 22:22:05,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-05 22:22:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 22:22:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-05 22:22:05,789 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-05 22:22:05,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:05,789 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-05 22:22:05,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:05,789 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-05 22:22:05,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:05,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:05,790 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:05,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:05,992 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:05,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:05,992 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-05 22:22:05,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:05,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821266337] [2020-10-05 22:22:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:06,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821266337] [2020-10-05 22:22:06,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088955301] [2020-10-05 22:22:06,101 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 [2020-10-05 22:22:06,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 22:22:06,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:06,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:06,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:06,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:06,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:06,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 22:22:06,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984250487] [2020-10-05 22:22:06,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:06,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:06,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:06,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:06,171 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-05 22:22:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:06,356 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-05 22:22:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:22:06,357 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 22:22:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:06,358 INFO L225 Difference]: With dead ends: 74 [2020-10-05 22:22:06,358 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 22:22:06,358 INFO L675 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 [2020-10-05 22:22:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 22:22:06,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-05 22:22:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-05 22:22:06,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-05 22:22:06,362 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-05 22:22:06,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:06,362 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-05 22:22:06,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:06,362 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-05 22:22:06,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:06,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:06,363 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:06,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-05 22:22:06,574 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:06,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:06,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-05 22:22:06,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:06,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749670863] [2020-10-05 22:22:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:06,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749670863] [2020-10-05 22:22:06,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374165837] [2020-10-05 22:22:06,653 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 [2020-10-05 22:22:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:06,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:06,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:06,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:06,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 22:22:06,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762713821] [2020-10-05 22:22:06,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:06,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:06,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:06,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:06,709 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-05 22:22:06,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:06,915 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-05 22:22:06,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:06,916 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 22:22:06,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:06,917 INFO L225 Difference]: With dead ends: 75 [2020-10-05 22:22:06,917 INFO L226 Difference]: Without dead ends: 69 [2020-10-05 22:22:06,918 INFO L675 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 [2020-10-05 22:22:06,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-05 22:22:06,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-05 22:22:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-05 22:22:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-05 22:22:06,920 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-05 22:22:06,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:06,920 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-05 22:22:06,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:06,921 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-05 22:22:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:06,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:06,921 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:07,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:07,126 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:07,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:07,126 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-05 22:22:07,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:07,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193163572] [2020-10-05 22:22:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:07,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193163572] [2020-10-05 22:22:07,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126333446] [2020-10-05 22:22:07,208 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 [2020-10-05 22:22:07,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:07,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:07,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:07,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:07,306 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:07,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:07,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 22:22:07,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160347324] [2020-10-05 22:22:07,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:07,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:07,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:07,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:07,317 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-05 22:22:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:07,565 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-05 22:22:07,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:22:07,566 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 22:22:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:07,567 INFO L225 Difference]: With dead ends: 79 [2020-10-05 22:22:07,567 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 22:22:07,567 INFO L675 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 [2020-10-05 22:22:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 22:22:07,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-05 22:22:07,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 22:22:07,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-05 22:22:07,569 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-05 22:22:07,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:07,570 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-05 22:22:07,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:07,570 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-05 22:22:07,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:07,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:07,570 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:07,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-05 22:22:07,771 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:07,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:07,772 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-05 22:22:07,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:07,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325741637] [2020-10-05 22:22:07,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:07,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325741637] [2020-10-05 22:22:07,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430628994] [2020-10-05 22:22:07,853 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 [2020-10-05 22:22:07,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 22:22:07,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:07,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:07,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:07,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:07,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 22:22:07,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018418867] [2020-10-05 22:22:07,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:07,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:07,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:07,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:07,937 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-05 22:22:08,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:08,190 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-05 22:22:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:22:08,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 22:22:08,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:08,192 INFO L225 Difference]: With dead ends: 79 [2020-10-05 22:22:08,192 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 22:22:08,192 INFO L675 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 [2020-10-05 22:22:08,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 22:22:08,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-05 22:22:08,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-05 22:22:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-05 22:22:08,195 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-05 22:22:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:08,195 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-05 22:22:08,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:08,196 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-05 22:22:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:08,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:08,196 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:08,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:08,397 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:08,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:08,398 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-05 22:22:08,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:08,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627021167] [2020-10-05 22:22:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:08,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627021167] [2020-10-05 22:22:08,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248081444] [2020-10-05 22:22:08,468 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 [2020-10-05 22:22:08,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:08,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:08,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:08,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:08,529 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:08,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:08,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 22:22:08,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143537142] [2020-10-05 22:22:08,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:08,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:08,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:08,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:08,545 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-05 22:22:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:08,879 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-05 22:22:08,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:22:08,879 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 22:22:08,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:08,880 INFO L225 Difference]: With dead ends: 76 [2020-10-05 22:22:08,880 INFO L226 Difference]: Without dead ends: 70 [2020-10-05 22:22:08,881 INFO L675 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 [2020-10-05 22:22:08,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-05 22:22:08,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-05 22:22:08,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 22:22:08,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-05 22:22:08,884 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-05 22:22:08,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:08,884 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-05 22:22:08,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:08,885 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-05 22:22:08,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:08,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:08,885 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:09,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-05 22:22:09,093 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:09,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:09,094 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-05 22:22:09,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:09,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677566255] [2020-10-05 22:22:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:09,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677566255] [2020-10-05 22:22:09,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360838971] [2020-10-05 22:22:09,160 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 [2020-10-05 22:22:09,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-05 22:22:09,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:09,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:09,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:09,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:09,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 22:22:09,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328032894] [2020-10-05 22:22:09,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:09,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:09,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:09,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:09,267 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-05 22:22:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:09,626 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-05 22:22:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:09,626 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 22:22:09,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:09,628 INFO L225 Difference]: With dead ends: 96 [2020-10-05 22:22:09,628 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 22:22:09,629 INFO L675 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 [2020-10-05 22:22:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 22:22:09,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-05 22:22:09,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 22:22:09,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-05 22:22:09,635 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-05 22:22:09,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:09,635 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-05 22:22:09,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:09,635 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-05 22:22:09,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:09,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:09,636 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:09,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-05 22:22:09,848 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:09,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:09,850 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-05 22:22:09,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:09,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583142455] [2020-10-05 22:22:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:09,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583142455] [2020-10-05 22:22:09,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642185660] [2020-10-05 22:22:09,992 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 [2020-10-05 22:22:10,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 22:22:10,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:10,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:10,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:10,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:10,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:10,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 22:22:10,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289033559] [2020-10-05 22:22:10,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:10,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:10,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:10,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:10,068 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-05 22:22:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:10,417 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-05 22:22:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:22:10,418 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 22:22:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:10,419 INFO L225 Difference]: With dead ends: 77 [2020-10-05 22:22:10,419 INFO L226 Difference]: Without dead ends: 69 [2020-10-05 22:22:10,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:22:10,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-05 22:22:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-05 22:22:10,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-05 22:22:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-05 22:22:10,422 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-05 22:22:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:10,423 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-05 22:22:10,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-05 22:22:10,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:10,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:10,423 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:10,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-05 22:22:10,632 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:10,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:10,632 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-05 22:22:10,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:10,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864267514] [2020-10-05 22:22:10,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:10,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864267514] [2020-10-05 22:22:10,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636212460] [2020-10-05 22:22:10,754 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 [2020-10-05 22:22:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:10,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:10,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:10,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:10,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 22:22:10,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704939119] [2020-10-05 22:22:10,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:10,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:10,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:10,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:10,830 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-05 22:22:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:11,045 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-05 22:22:11,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:22:11,046 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 22:22:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:11,047 INFO L225 Difference]: With dead ends: 84 [2020-10-05 22:22:11,047 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 22:22:11,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:22:11,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 22:22:11,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-05 22:22:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 22:22:11,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 22:22:11,051 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-05 22:22:11,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:11,052 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 22:22:11,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:11,052 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 22:22:11,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:11,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:11,053 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:11,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-05 22:22:11,262 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:11,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:11,263 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-05 22:22:11,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:11,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947242214] [2020-10-05 22:22:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:11,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947242214] [2020-10-05 22:22:11,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945674430] [2020-10-05 22:22:11,362 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 [2020-10-05 22:22:11,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:11,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:11,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:11,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:11,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:11,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:11,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 22:22:11,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972586464] [2020-10-05 22:22:11,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:11,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:11,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:11,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:11,437 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-05 22:22:11,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:11,700 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-05 22:22:11,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:22:11,701 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 22:22:11,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:11,701 INFO L225 Difference]: With dead ends: 81 [2020-10-05 22:22:11,701 INFO L226 Difference]: Without dead ends: 75 [2020-10-05 22:22:11,702 INFO L675 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 [2020-10-05 22:22:11,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-05 22:22:11,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-05 22:22:11,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 22:22:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 22:22:11,705 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-05 22:22:11,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:11,705 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 22:22:11,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:11,710 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 22:22:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:11,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:11,711 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:11,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-05 22:22:11,912 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:11,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-05 22:22:11,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:11,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099721932] [2020-10-05 22:22:11,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:11,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099721932] [2020-10-05 22:22:11,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554126983] [2020-10-05 22:22:11,993 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 [2020-10-05 22:22:12,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 22:22:12,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:12,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:12,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:12,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:12,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 22:22:12,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44311217] [2020-10-05 22:22:12,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:12,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:12,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:12,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:12,054 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-05 22:22:12,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:12,304 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-05 22:22:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:12,304 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 22:22:12,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:12,305 INFO L225 Difference]: With dead ends: 78 [2020-10-05 22:22:12,306 INFO L226 Difference]: Without dead ends: 72 [2020-10-05 22:22:12,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:22:12,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-05 22:22:12,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-05 22:22:12,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 22:22:12,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 22:22:12,310 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-05 22:22:12,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:12,311 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 22:22:12,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:12,311 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 22:22:12,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:12,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:12,312 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:12,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-05 22:22:12,513 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:12,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:12,513 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-05 22:22:12,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:12,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316540796] [2020-10-05 22:22:12,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:12,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316540796] [2020-10-05 22:22:12,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020472080] [2020-10-05 22:22:12,601 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 [2020-10-05 22:22:12,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:12,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:12,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:12,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:12,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:12,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:12,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 22:22:12,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822634682] [2020-10-05 22:22:12,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:12,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:12,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:12,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:12,691 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-05 22:22:13,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:13,014 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-05 22:22:13,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:22:13,015 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 22:22:13,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:13,016 INFO L225 Difference]: With dead ends: 77 [2020-10-05 22:22:13,016 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 22:22:13,016 INFO L675 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 [2020-10-05 22:22:13,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 22:22:13,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-05 22:22:13,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 22:22:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 22:22:13,018 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-05 22:22:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:13,019 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 22:22:13,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:13,019 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 22:22:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:13,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:13,019 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:13,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-05 22:22:13,227 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:13,227 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-05 22:22:13,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:13,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153102478] [2020-10-05 22:22:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:13,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153102478] [2020-10-05 22:22:13,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779122660] [2020-10-05 22:22:13,318 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 [2020-10-05 22:22:13,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-05 22:22:13,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:13,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:13,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:13,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:13,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 22:22:13,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605118499] [2020-10-05 22:22:13,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:13,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:13,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:13,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:13,401 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-05 22:22:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:13,664 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-05 22:22:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:22:13,664 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 22:22:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:13,665 INFO L225 Difference]: With dead ends: 74 [2020-10-05 22:22:13,666 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 22:22:13,666 INFO L675 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 [2020-10-05 22:22:13,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 22:22:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-05 22:22:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 22:22:13,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 22:22:13,669 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-05 22:22:13,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:13,670 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 22:22:13,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:13,670 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 22:22:13,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:13,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:13,671 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:13,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:13,874 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:13,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:13,874 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-05 22:22:13,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:13,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474018613] [2020-10-05 22:22:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:13,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474018613] [2020-10-05 22:22:13,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654688693] [2020-10-05 22:22:13,954 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 [2020-10-05 22:22:14,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 22:22:14,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:14,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:14,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:14,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:14,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:14,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 22:22:14,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5997674] [2020-10-05 22:22:14,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:14,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:14,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:14,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:14,053 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-05 22:22:14,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:14,443 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-05 22:22:14,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:22:14,444 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 22:22:14,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:14,445 INFO L225 Difference]: With dead ends: 73 [2020-10-05 22:22:14,445 INFO L226 Difference]: Without dead ends: 67 [2020-10-05 22:22:14,446 INFO L675 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 [2020-10-05 22:22:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-05 22:22:14,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-05 22:22:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 22:22:14,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 22:22:14,449 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-05 22:22:14,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:14,449 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 22:22:14,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 22:22:14,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:14,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:14,450 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:14,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-05 22:22:14,659 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:14,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:14,659 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-05 22:22:14,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:14,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915960796] [2020-10-05 22:22:14,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:14,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:14,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915960796] [2020-10-05 22:22:14,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094251877] [2020-10-05 22:22:14,734 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 [2020-10-05 22:22:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:14,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:14,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:14,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:14,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 22:22:14,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391140674] [2020-10-05 22:22:14,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:14,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:14,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:14,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:14,849 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-05 22:22:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:15,161 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-05 22:22:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:15,161 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 22:22:15,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:15,162 INFO L225 Difference]: With dead ends: 89 [2020-10-05 22:22:15,163 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 22:22:15,163 INFO L675 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 [2020-10-05 22:22:15,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 22:22:15,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-05 22:22:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-05 22:22:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-05 22:22:15,167 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-05 22:22:15,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:15,167 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-05 22:22:15,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:15,167 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-05 22:22:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:15,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:15,168 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:15,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:15,378 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:15,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:15,379 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-05 22:22:15,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:15,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337188253] [2020-10-05 22:22:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:15,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337188253] [2020-10-05 22:22:15,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445744613] [2020-10-05 22:22:15,454 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 [2020-10-05 22:22:15,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:15,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:15,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:15,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:15,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:15,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 22:22:15,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197293634] [2020-10-05 22:22:15,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:15,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:15,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:15,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:15,542 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-05 22:22:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:15,931 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-05 22:22:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:22:15,932 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 22:22:15,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:15,933 INFO L225 Difference]: With dead ends: 68 [2020-10-05 22:22:15,933 INFO L226 Difference]: Without dead ends: 60 [2020-10-05 22:22:15,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:22:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-05 22:22:15,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-05 22:22:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-05 22:22:15,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-05 22:22:15,936 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-05 22:22:15,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:15,937 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-05 22:22:15,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-05 22:22:15,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:15,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:15,937 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:16,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-05 22:22:16,140 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:16,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:16,140 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-05 22:22:16,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:16,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295715122] [2020-10-05 22:22:16,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:16,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295715122] [2020-10-05 22:22:16,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596218954] [2020-10-05 22:22:16,219 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 [2020-10-05 22:22:16,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 22:22:16,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:16,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:16,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:16,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:16,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:16,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 22:22:16,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070920614] [2020-10-05 22:22:16,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:16,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:16,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:16,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:16,308 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-05 22:22:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:16,690 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-05 22:22:16,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:16,691 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 22:22:16,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:16,691 INFO L225 Difference]: With dead ends: 76 [2020-10-05 22:22:16,691 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 22:22:16,692 INFO L675 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 [2020-10-05 22:22:16,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 22:22:16,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-05 22:22:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 22:22:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-05 22:22:16,695 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-05 22:22:16,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:16,695 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-05 22:22:16,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:16,695 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-05 22:22:16,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:16,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:16,696 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:16,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:16,906 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:16,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:16,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-05 22:22:16,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:16,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367848319] [2020-10-05 22:22:16,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:16,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367848319] [2020-10-05 22:22:16,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228765458] [2020-10-05 22:22:16,999 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 [2020-10-05 22:22:17,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:17,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:17,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:17,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:17,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:17,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:17,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:17,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947062238] [2020-10-05 22:22:17,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:17,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:17,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:17,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:17,089 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-05 22:22:17,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:17,503 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-05 22:22:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:17,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:17,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:17,504 INFO L225 Difference]: With dead ends: 66 [2020-10-05 22:22:17,505 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 22:22:17,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-05 22:22:17,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 22:22:17,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-05 22:22:17,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:22:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-05 22:22:17,508 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-05 22:22:17,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:17,509 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-05 22:22:17,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:17,509 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-05 22:22:17,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:17,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:17,509 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:17,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-05 22:22:17,719 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:17,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:17,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-05 22:22:17,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:17,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228392963] [2020-10-05 22:22:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:17,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228392963] [2020-10-05 22:22:17,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308429931] [2020-10-05 22:22:17,831 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 [2020-10-05 22:22:17,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 22:22:17,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:17,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:17,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:17,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:17,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 22:22:17,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054494083] [2020-10-05 22:22:17,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:17,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:17,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:17,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:17,933 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-05 22:22:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:18,121 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-05 22:22:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:22:18,121 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 22:22:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:18,122 INFO L225 Difference]: With dead ends: 72 [2020-10-05 22:22:18,122 INFO L226 Difference]: Without dead ends: 66 [2020-10-05 22:22:18,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:22:18,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-05 22:22:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-05 22:22:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 22:22:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-05 22:22:18,125 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-05 22:22:18,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:18,125 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-05 22:22:18,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:18,126 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-05 22:22:18,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:18,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:18,126 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:18,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-05 22:22:18,327 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:18,328 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-05 22:22:18,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:18,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979130860] [2020-10-05 22:22:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:18,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979130860] [2020-10-05 22:22:18,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475017144] [2020-10-05 22:22:18,437 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 [2020-10-05 22:22:18,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 22:22:18,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:18,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:18,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:18,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:18,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:18,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:18,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981066286] [2020-10-05 22:22:18,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:18,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:18,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:18,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:18,516 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-05 22:22:18,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:18,751 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-05 22:22:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:22:18,752 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:18,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:18,753 INFO L225 Difference]: With dead ends: 82 [2020-10-05 22:22:18,753 INFO L226 Difference]: Without dead ends: 76 [2020-10-05 22:22:18,753 INFO L675 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 [2020-10-05 22:22:18,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-05 22:22:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-05 22:22:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 22:22:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-05 22:22:18,756 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-05 22:22:18,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:18,756 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-05 22:22:18,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-05 22:22:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:18,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:18,757 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:18,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-05 22:22:18,965 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:18,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:18,966 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-05 22:22:18,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:18,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000887101] [2020-10-05 22:22:18,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:19,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000887101] [2020-10-05 22:22:19,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623527170] [2020-10-05 22:22:19,067 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 [2020-10-05 22:22:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:19,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:19,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:19,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:19,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 22:22:19,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496270892] [2020-10-05 22:22:19,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:19,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:19,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:19,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:19,139 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-05 22:22:19,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:19,379 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-05 22:22:19,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:22:19,380 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 22:22:19,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:19,381 INFO L225 Difference]: With dead ends: 83 [2020-10-05 22:22:19,381 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 22:22:19,382 INFO L675 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 [2020-10-05 22:22:19,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 22:22:19,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-05 22:22:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-05 22:22:19,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-05 22:22:19,385 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-05 22:22:19,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:19,385 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-05 22:22:19,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:19,385 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-05 22:22:19,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:19,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:19,386 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:19,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-05 22:22:19,591 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:19,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-05 22:22:19,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:19,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700896113] [2020-10-05 22:22:19,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:19,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700896113] [2020-10-05 22:22:19,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755046482] [2020-10-05 22:22:19,696 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 [2020-10-05 22:22:19,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:19,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:19,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:19,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:19,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:19,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:19,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:19,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261828881] [2020-10-05 22:22:19,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:19,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:19,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:19,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:19,806 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-05 22:22:20,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:20,106 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-05 22:22:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:22:20,110 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:20,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:20,111 INFO L225 Difference]: With dead ends: 89 [2020-10-05 22:22:20,111 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 22:22:20,111 INFO L675 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 [2020-10-05 22:22:20,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 22:22:20,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-05 22:22:20,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 22:22:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-05 22:22:20,114 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-05 22:22:20,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:20,114 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-05 22:22:20,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:20,114 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-05 22:22:20,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:20,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:20,115 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:20,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:20,324 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:20,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:20,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-05 22:22:20,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:20,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214247129] [2020-10-05 22:22:20,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:20,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214247129] [2020-10-05 22:22:20,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891957487] [2020-10-05 22:22:20,430 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 [2020-10-05 22:22:20,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-05 22:22:20,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:20,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:20,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:20,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:20,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 22:22:20,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195537402] [2020-10-05 22:22:20,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:20,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:20,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:20,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:20,521 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-05 22:22:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:20,825 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-05 22:22:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:20,826 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 22:22:20,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:20,827 INFO L225 Difference]: With dead ends: 89 [2020-10-05 22:22:20,827 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 22:22:20,828 INFO L675 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 [2020-10-05 22:22:20,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 22:22:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-05 22:22:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 22:22:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 22:22:20,831 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-05 22:22:20,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:20,831 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 22:22:20,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:20,831 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 22:22:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:20,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:20,832 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:21,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:21,041 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:21,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:21,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-05 22:22:21,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:21,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661527921] [2020-10-05 22:22:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:21,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661527921] [2020-10-05 22:22:21,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567446746] [2020-10-05 22:22:21,137 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 [2020-10-05 22:22:21,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:21,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:21,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:21,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:21,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:21,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:21,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:21,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770416826] [2020-10-05 22:22:21,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:21,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:21,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:21,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:21,241 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-05 22:22:21,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:21,650 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-05 22:22:21,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:22:21,650 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:21,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:21,651 INFO L225 Difference]: With dead ends: 86 [2020-10-05 22:22:21,651 INFO L226 Difference]: Without dead ends: 80 [2020-10-05 22:22:21,652 INFO L675 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 [2020-10-05 22:22:21,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-05 22:22:21,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-05 22:22:21,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 22:22:21,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 22:22:21,654 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-05 22:22:21,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:21,655 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 22:22:21,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:21,655 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 22:22:21,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:21,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:21,656 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:21,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-05 22:22:21,864 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:21,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:21,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-05 22:22:21,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:21,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599066084] [2020-10-05 22:22:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:21,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599066084] [2020-10-05 22:22:21,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344473783] [2020-10-05 22:22:21,956 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 [2020-10-05 22:22:22,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 22:22:22,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:22,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:22,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:22,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:22,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 22:22:22,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589835209] [2020-10-05 22:22:22,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:22,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:22,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:22,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:22,023 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-05 22:22:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:22,352 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-05 22:22:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 22:22:22,352 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 22:22:22,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:22,353 INFO L225 Difference]: With dead ends: 87 [2020-10-05 22:22:22,354 INFO L226 Difference]: Without dead ends: 81 [2020-10-05 22:22:22,354 INFO L675 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 [2020-10-05 22:22:22,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-05 22:22:22,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-05 22:22:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-05 22:22:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-05 22:22:22,357 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-05 22:22:22,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:22,357 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-05 22:22:22,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:22,357 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-05 22:22:22,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:22,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:22,358 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:22,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:22,567 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:22,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:22,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-05 22:22:22,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:22,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690140338] [2020-10-05 22:22:22,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:22,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690140338] [2020-10-05 22:22:22,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829055776] [2020-10-05 22:22:22,646 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 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 [2020-10-05 22:22:22,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 22:22:22,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:22,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:22,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:22,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:22,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:22,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:22,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381510249] [2020-10-05 22:22:22,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:22,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:22,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:22,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:22,728 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-05 22:22:23,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:23,149 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-05 22:22:23,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:22:23,150 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:23,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:23,151 INFO L225 Difference]: With dead ends: 84 [2020-10-05 22:22:23,151 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 22:22:23,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-05 22:22:23,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 22:22:23,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-05 22:22:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 22:22:23,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-05 22:22:23,154 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-05 22:22:23,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:23,154 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-05 22:22:23,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:23,154 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-05 22:22:23,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:23,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:23,155 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:23,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-05 22:22:23,363 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:23,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-05 22:22:23,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:23,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553726937] [2020-10-05 22:22:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:23,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553726937] [2020-10-05 22:22:23,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198276053] [2020-10-05 22:22:23,449 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 [2020-10-05 22:22:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:23,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:23,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:23,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:23,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 22:22:23,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328193] [2020-10-05 22:22:23,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:23,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:23,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:23,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:23,509 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-05 22:22:23,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:23,879 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-05 22:22:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:22:23,880 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 22:22:23,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:23,881 INFO L225 Difference]: With dead ends: 104 [2020-10-05 22:22:23,881 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 22:22:23,881 INFO L675 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 [2020-10-05 22:22:23,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 22:22:23,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-05 22:22:23,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 22:22:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-05 22:22:23,885 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-05 22:22:23,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:23,886 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-05 22:22:23,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:23,886 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-05 22:22:23,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:23,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:23,886 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:24,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-05 22:22:24,093 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:24,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-05 22:22:24,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:24,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890092544] [2020-10-05 22:22:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:24,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890092544] [2020-10-05 22:22:24,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483634024] [2020-10-05 22:22:24,166 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 [2020-10-05 22:22:24,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:24,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:24,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:24,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:24,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:24,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:24,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:24,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056346480] [2020-10-05 22:22:24,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:24,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:24,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:24,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:24,283 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-05 22:22:24,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:24,718 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-05 22:22:24,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:22:24,719 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:24,719 INFO L225 Difference]: With dead ends: 85 [2020-10-05 22:22:24,720 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 22:22:24,720 INFO L675 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 [2020-10-05 22:22:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 22:22:24,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-05 22:22:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-05 22:22:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-05 22:22:24,722 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-05 22:22:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:24,722 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-05 22:22:24,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-05 22:22:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:24,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:24,723 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:24,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-05 22:22:24,930 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:24,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:24,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-05 22:22:24,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:24,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21262833] [2020-10-05 22:22:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 22:22:24,939 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 22:22:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 22:22:24,966 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 22:22:25,011 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 22:22:25,011 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 22:22:25,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-05 22:22:25,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 10:22:25 BasicIcfg [2020-10-05 22:22:25,115 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-05 22:22:25,118 INFO L168 Benchmark]: Toolchain (without parser) took 37433.54 ms. Allocated memory was 142.6 MB in the beginning and 394.3 MB in the end (delta: 251.7 MB). Free memory was 103.9 MB in the beginning and 244.4 MB in the end (delta: -140.5 MB). Peak memory consumption was 111.2 MB. Max. memory is 7.1 GB. [2020-10-05 22:22:25,119 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 142.6 MB. Free memory was 124.1 MB in the beginning and 123.7 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-10-05 22:22:25,119 INFO L168 Benchmark]: CACSL2BoogieTranslator took 733.66 ms. Allocated memory was 142.6 MB in the beginning and 205.0 MB in the end (delta: 62.4 MB). Free memory was 103.5 MB in the beginning and 163.9 MB in the end (delta: -60.5 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-10-05 22:22:25,120 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.97 ms. Allocated memory is still 205.0 MB. Free memory was 163.9 MB in the beginning and 162.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2020-10-05 22:22:25,120 INFO L168 Benchmark]: Boogie Preprocessor took 31.29 ms. Allocated memory is still 205.0 MB. Free memory was 162.1 MB in the beginning and 160.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2020-10-05 22:22:25,122 INFO L168 Benchmark]: RCFGBuilder took 447.62 ms. Allocated memory is still 205.0 MB. Free memory was 160.3 MB in the beginning and 140.7 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-10-05 22:22:25,123 INFO L168 Benchmark]: TraceAbstraction took 36162.71 ms. Allocated memory was 205.0 MB in the beginning and 394.3 MB in the end (delta: 189.3 MB). Free memory was 139.8 MB in the beginning and 244.4 MB in the end (delta: -104.6 MB). Peak memory consumption was 84.7 MB. Max. memory is 7.1 GB. [2020-10-05 22:22:25,126 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 142.6 MB. Free memory was 124.1 MB in the beginning and 123.7 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 733.66 ms. Allocated memory was 142.6 MB in the beginning and 205.0 MB in the end (delta: 62.4 MB). Free memory was 103.5 MB in the beginning and 163.9 MB in the end (delta: -60.5 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 49.97 ms. Allocated memory is still 205.0 MB. Free memory was 163.9 MB in the beginning and 162.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.29 ms. Allocated memory is still 205.0 MB. Free memory was 162.1 MB in the beginning and 160.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 447.62 ms. Allocated memory is still 205.0 MB. Free memory was 160.3 MB in the beginning and 140.7 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 36162.71 ms. Allocated memory was 205.0 MB in the beginning and 394.3 MB in the end (delta: 189.3 MB). Free memory was 139.8 MB in the beginning and 244.4 MB in the end (delta: -104.6 MB). Peak memory consumption was 84.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L697] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L700] 0 int condJ = j >= (2*5 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 35.9s, OverallIterations: 59, TraceHistogramMax: 5, AutomataDifference: 13.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 901 SDtfs, 2428 SDslu, 3534 SDs, 0 SdLazy, 3810 SolverSat, 1596 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1778 GetRequests, 634 SyntacticMatches, 53 SemanticMatches, 1091 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4729 ImplicationChecksByTransitivity, 12.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 58 MinimizatonAttempts, 952 StatesRemovedByMinimization, 57 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 1602 NumberOfCodeBlocks, 1602 NumberOfCodeBlocksAsserted, 196 NumberOfCheckSat, 1473 ConstructedInterpolants, 0 QuantifiedInterpolants, 86797 SizeOfPredicates, 346 NumberOfNonLiveVariables, 5122 ConjunctsInSsa, 560 ConjunctsInUnsatCore, 111 InterpolantComputations, 5 PerfectInterpolantSequences, 0/900 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...