/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-keepdead.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-e5469eb [2021-01-20 18:10:59,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-20 18:10:59,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-20 18:10:59,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-20 18:10:59,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-20 18:10:59,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-20 18:10:59,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-20 18:10:59,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-20 18:10:59,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-20 18:10:59,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-20 18:10:59,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-20 18:10:59,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-20 18:10:59,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-20 18:10:59,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-20 18:10:59,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-20 18:10:59,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-20 18:10:59,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-20 18:10:59,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-20 18:10:59,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-20 18:10:59,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-20 18:10:59,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-20 18:10:59,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-20 18:10:59,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-20 18:10:59,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-20 18:10:59,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-20 18:10:59,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-20 18:10:59,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-20 18:10:59,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-20 18:10:59,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-20 18:10:59,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-20 18:10:59,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-20 18:10:59,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-20 18:10:59,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-20 18:10:59,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-20 18:10:59,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-20 18:10:59,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-20 18:10:59,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-20 18:10:59,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-20 18:10:59,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-20 18:10:59,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-20 18:10:59,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-20 18:10:59,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-keepdead.epf [2021-01-20 18:10:59,705 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-20 18:10:59,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-20 18:10:59,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-20 18:10:59,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-20 18:10:59,711 INFO L138 SettingsManager]: * Use SBE=true [2021-01-20 18:10:59,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-20 18:10:59,711 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-20 18:10:59,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-20 18:10:59,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-20 18:10:59,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-20 18:10:59,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-20 18:10:59,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-20 18:10:59,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-20 18:10:59,714 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-20 18:10:59,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-20 18:10:59,714 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-20 18:10:59,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-20 18:10:59,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-20 18:10:59,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-20 18:10:59,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-20 18:10:59,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-20 18:10:59,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 18:10:59,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-20 18:10:59,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-20 18:10:59,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-20 18:10:59,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-20 18:10:59,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-20 18:10:59,718 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-20 18:10:59,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-20 18:10:59,718 INFO L138 SettingsManager]: * Remove dead ends from automaton=false [2021-01-20 18:10:59,719 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-20 18:10:59,719 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-20 18:11:00,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-20 18:11:00,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-20 18:11:00,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-20 18:11:00,184 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-20 18:11:00,185 INFO L275 PluginConnector]: CDTParser initialized [2021-01-20 18:11:00,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2021-01-20 18:11:00,301 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d6dcd544/9cb224d1e96f4faca73aa0e32ee76db3/FLAGaade56636 [2021-01-20 18:11:00,960 INFO L306 CDTParser]: Found 1 translation units. [2021-01-20 18:11:00,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2021-01-20 18:11:00,978 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d6dcd544/9cb224d1e96f4faca73aa0e32ee76db3/FLAGaade56636 [2021-01-20 18:11:01,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d6dcd544/9cb224d1e96f4faca73aa0e32ee76db3 [2021-01-20 18:11:01,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-20 18:11:01,257 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-20 18:11:01,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-20 18:11:01,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-20 18:11:01,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-20 18:11:01,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 06:11:01" (1/1) ... [2021-01-20 18:11:01,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@153092c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:11:01, skipping insertion in model container [2021-01-20 18:11:01,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 06:11:01" (1/1) ... [2021-01-20 18:11:01,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-20 18:11:01,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-20 18:11:01,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 18:11:01,835 INFO L203 MainTranslator]: Completed pre-run [2021-01-20 18:11:01,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 18:11:01,999 INFO L208 MainTranslator]: Completed translation [2021-01-20 18:11:01,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:11:01 WrapperNode [2021-01-20 18:11:02,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-20 18:11:02,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-20 18:11:02,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-20 18:11:02,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-20 18:11:02,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:11:01" (1/1) ... [2021-01-20 18:11:02,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:11:01" (1/1) ... [2021-01-20 18:11:02,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-20 18:11:02,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-20 18:11:02,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-20 18:11:02,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-20 18:11:02,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:11:01" (1/1) ... [2021-01-20 18:11:02,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:11:01" (1/1) ... [2021-01-20 18:11:02,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:11:01" (1/1) ... [2021-01-20 18:11:02,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:11:01" (1/1) ... [2021-01-20 18:11:02,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:11:01" (1/1) ... [2021-01-20 18:11:02,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:11:01" (1/1) ... [2021-01-20 18:11:02,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:11:01" (1/1) ... [2021-01-20 18:11:02,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-20 18:11:02,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-20 18:11:02,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-20 18:11:02,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-20 18:11:02,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:11:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 18:11:02,161 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-20 18:11:02,161 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-20 18:11:02,162 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-20 18:11:02,162 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-20 18:11:02,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-20 18:11:02,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-20 18:11:02,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-20 18:11:02,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-20 18:11:02,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-20 18:11:02,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-20 18:11:02,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-20 18:11:02,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-20 18:11:02,165 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-20 18:11:02,548 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-20 18:11:02,549 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-20 18:11:02,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 06:11:02 BoogieIcfgContainer [2021-01-20 18:11:02,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-20 18:11:02,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-20 18:11:02,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-20 18:11:02,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-20 18:11:02,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 06:11:01" (1/3) ... [2021-01-20 18:11:02,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb2acab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 06:11:02, skipping insertion in model container [2021-01-20 18:11:02,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:11:01" (2/3) ... [2021-01-20 18:11:02,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb2acab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 06:11:02, skipping insertion in model container [2021-01-20 18:11:02,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 06:11:02" (3/3) ... [2021-01-20 18:11:02,571 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2021-01-20 18:11:02,585 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-20 18:11:02,586 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-20 18:11:02,589 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-20 18:11:02,590 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-20 18:11:02,622 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,622 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,623 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,623 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,623 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,623 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,624 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,624 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,624 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,624 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,625 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,625 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,625 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,625 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,626 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,626 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,626 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,626 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,627 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,627 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,627 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,627 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,627 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,628 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,628 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,628 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,628 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,628 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,629 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,629 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,629 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,630 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,630 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,630 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,630 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,630 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,631 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,631 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,631 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,631 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,632 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,632 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,632 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,632 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,633 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,633 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,633 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,633 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,634 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,634 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,634 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,634 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,634 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,635 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,635 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,635 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,637 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,638 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,638 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,638 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,638 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,638 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,644 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,644 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,644 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,644 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,645 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,645 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:11:02,647 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-20 18:11:02,660 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-20 18:11:02,682 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-20 18:11:02,682 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-20 18:11:02,683 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-20 18:11:02,683 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-20 18:11:02,683 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-20 18:11:02,683 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-20 18:11:02,683 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-20 18:11:02,683 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-20 18:11:02,694 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 138 flow [2021-01-20 18:11:02,829 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:02,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:02,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-20 18:11:02,858 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:02,860 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:02,860 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:02,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:02,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1900887756, now seen corresponding path program 1 times [2021-01-20 18:11:02,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:02,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409762670] [2021-01-20 18:11:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:03,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409762670] [2021-01-20 18:11:03,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:11:03,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 18:11:03,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156160911] [2021-01-20 18:11:03,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 18:11:03,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:03,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 18:11:03,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 18:11:03,362 INFO L87 Difference]: Start difference. First operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:03,577 INFO L93 Difference]: Finished difference Result 3336 states and 9728 transitions. [2021-01-20 18:11:03,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-20 18:11:03,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-01-20 18:11:03,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:03,581 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-20 18:11:03,582 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 9728 transitions. Word has length 28 [2021-01-20 18:11:03,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:03,583 INFO L481 AbstractCegarLoop]: Abstraction has 3336 states and 9728 transitions. [2021-01-20 18:11:03,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:03,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 9728 transitions. [2021-01-20 18:11:03,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-20 18:11:03,592 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:03,592 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:03,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-20 18:11:03,593 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:03,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:03,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1199752031, now seen corresponding path program 1 times [2021-01-20 18:11:03,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:03,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564262039] [2021-01-20 18:11:03,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:03,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564262039] [2021-01-20 18:11:03,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:11:03,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 18:11:03,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492852825] [2021-01-20 18:11:03,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 18:11:03,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:03,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 18:11:03,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 18:11:03,815 INFO L87 Difference]: Start difference. First operand 3336 states and 9728 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:04,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:04,002 INFO L93 Difference]: Finished difference Result 6379 states and 18647 transitions. [2021-01-20 18:11:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-20 18:11:04,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-01-20 18:11:04,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:04,005 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:11:04,005 INFO L78 Accepts]: Start accepts. Automaton has 6379 states and 18647 transitions. Word has length 32 [2021-01-20 18:11:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:04,006 INFO L481 AbstractCegarLoop]: Abstraction has 6379 states and 18647 transitions. [2021-01-20 18:11:04,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 6379 states and 18647 transitions. [2021-01-20 18:11:04,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-20 18:11:04,010 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:04,011 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:04,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-20 18:11:04,011 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:04,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:04,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1202725261, now seen corresponding path program 2 times [2021-01-20 18:11:04,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:04,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511167802] [2021-01-20 18:11:04,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:04,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511167802] [2021-01-20 18:11:04,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:11:04,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 18:11:04,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871224874] [2021-01-20 18:11:04,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 18:11:04,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:04,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 18:11:04,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-20 18:11:04,183 INFO L87 Difference]: Start difference. First operand 6379 states and 18647 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:04,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:04,403 INFO L93 Difference]: Finished difference Result 7067 states and 20591 transitions. [2021-01-20 18:11:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-20 18:11:04,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-01-20 18:11:04,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:04,405 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:11:04,405 INFO L78 Accepts]: Start accepts. Automaton has 7067 states and 20591 transitions. Word has length 32 [2021-01-20 18:11:04,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:04,405 INFO L481 AbstractCegarLoop]: Abstraction has 7067 states and 20591 transitions. [2021-01-20 18:11:04,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:04,406 INFO L276 IsEmpty]: Start isEmpty. Operand 7067 states and 20591 transitions. [2021-01-20 18:11:04,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-20 18:11:04,414 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:04,414 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:04,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-20 18:11:04,415 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:04,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:04,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1299742308, now seen corresponding path program 1 times [2021-01-20 18:11:04,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:04,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204825969] [2021-01-20 18:11:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:04,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204825969] [2021-01-20 18:11:04,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:11:04,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 18:11:04,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530656125] [2021-01-20 18:11:04,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 18:11:04,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:04,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 18:11:04,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-20 18:11:04,567 INFO L87 Difference]: Start difference. First operand 7067 states and 20591 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:04,794 INFO L93 Difference]: Finished difference Result 9179 states and 26799 transitions. [2021-01-20 18:11:04,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 18:11:04,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-01-20 18:11:04,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:04,796 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:11:04,796 INFO L78 Accepts]: Start accepts. Automaton has 9179 states and 26799 transitions. Word has length 36 [2021-01-20 18:11:04,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:04,796 INFO L481 AbstractCegarLoop]: Abstraction has 9179 states and 26799 transitions. [2021-01-20 18:11:04,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 9179 states and 26799 transitions. [2021-01-20 18:11:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-20 18:11:04,804 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:04,804 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:04,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-20 18:11:04,805 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:04,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:04,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1296769078, now seen corresponding path program 2 times [2021-01-20 18:11:04,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:04,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431449264] [2021-01-20 18:11:04,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:04,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431449264] [2021-01-20 18:11:04,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:11:04,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 18:11:04,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665231337] [2021-01-20 18:11:04,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 18:11:04,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:04,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 18:11:04,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-20 18:11:04,912 INFO L87 Difference]: Start difference. First operand 9179 states and 26799 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:05,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:05,126 INFO L93 Difference]: Finished difference Result 9115 states and 26543 transitions. [2021-01-20 18:11:05,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-20 18:11:05,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-01-20 18:11:05,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:05,128 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:11:05,128 INFO L78 Accepts]: Start accepts. Automaton has 9115 states and 26543 transitions. Word has length 36 [2021-01-20 18:11:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:05,128 INFO L481 AbstractCegarLoop]: Abstraction has 9115 states and 26543 transitions. [2021-01-20 18:11:05,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 9115 states and 26543 transitions. [2021-01-20 18:11:05,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-20 18:11:05,136 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:05,136 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:05,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-20 18:11:05,137 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:05,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:05,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1841087432, now seen corresponding path program 3 times [2021-01-20 18:11:05,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:05,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581055584] [2021-01-20 18:11:05,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:05,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581055584] [2021-01-20 18:11:05,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:11:05,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 18:11:05,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925815422] [2021-01-20 18:11:05,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 18:11:05,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:05,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 18:11:05,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-20 18:11:05,230 INFO L87 Difference]: Start difference. First operand 9115 states and 26543 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:05,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:05,593 INFO L93 Difference]: Finished difference Result 9947 states and 28975 transitions. [2021-01-20 18:11:05,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-20 18:11:05,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-01-20 18:11:05,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:05,595 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:11:05,595 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 28975 transitions. Word has length 36 [2021-01-20 18:11:05,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:05,595 INFO L481 AbstractCegarLoop]: Abstraction has 9947 states and 28975 transitions. [2021-01-20 18:11:05,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:05,596 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 28975 transitions. [2021-01-20 18:11:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-20 18:11:05,610 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:05,610 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:05,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-20 18:11:05,611 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:05,611 INFO L82 PathProgramCache]: Analyzing trace with hash -940103400, now seen corresponding path program 1 times [2021-01-20 18:11:05,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:05,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421051962] [2021-01-20 18:11:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:05,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:05,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421051962] [2021-01-20 18:11:05,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909161225] [2021-01-20 18:11:05,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:05,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 18:11:05,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:05,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:05,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:05,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:05,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-20 18:11:05,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437301714] [2021-01-20 18:11:05,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 18:11:05,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:05,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 18:11:05,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:11:05,916 INFO L87 Difference]: Start difference. First operand 9947 states and 28975 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:06,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:06,316 INFO L93 Difference]: Finished difference Result 13083 states and 38191 transitions. [2021-01-20 18:11:06,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 18:11:06,317 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-01-20 18:11:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:06,320 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-01-20 18:11:06,320 INFO L78 Accepts]: Start accepts. Automaton has 13083 states and 38191 transitions. Word has length 41 [2021-01-20 18:11:06,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:06,321 INFO L481 AbstractCegarLoop]: Abstraction has 13083 states and 38191 transitions. [2021-01-20 18:11:06,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:06,321 INFO L276 IsEmpty]: Start isEmpty. Operand 13083 states and 38191 transitions. [2021-01-20 18:11:06,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 18:11:06,346 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:06,347 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:06,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-20 18:11:06,562 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:06,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:06,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1546743908, now seen corresponding path program 1 times [2021-01-20 18:11:06,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:06,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315862520] [2021-01-20 18:11:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:06,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315862520] [2021-01-20 18:11:06,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786190248] [2021-01-20 18:11:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:06,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 18:11:06,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:06,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:06,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:06,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-01-20 18:11:06,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797309816] [2021-01-20 18:11:06,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 18:11:06,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:06,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 18:11:06,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-20 18:11:06,856 INFO L87 Difference]: Start difference. First operand 13083 states and 38191 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:07,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:07,080 INFO L93 Difference]: Finished difference Result 16539 states and 48303 transitions. [2021-01-20 18:11:07,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-20 18:11:07,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-01-20 18:11:07,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:07,082 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:11:07,082 INFO L78 Accepts]: Start accepts. Automaton has 16539 states and 48303 transitions. Word has length 46 [2021-01-20 18:11:07,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:07,083 INFO L481 AbstractCegarLoop]: Abstraction has 16539 states and 48303 transitions. [2021-01-20 18:11:07,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 16539 states and 48303 transitions. [2021-01-20 18:11:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 18:11:07,117 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:07,117 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:07,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:07,331 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:07,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:07,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1378232494, now seen corresponding path program 2 times [2021-01-20 18:11:07,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:07,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349582360] [2021-01-20 18:11:07,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:07,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349582360] [2021-01-20 18:11:07,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584907504] [2021-01-20 18:11:07,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:07,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:11:07,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:07,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 18:11:07,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:07,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:07,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:07,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:07,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-20 18:11:07,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759734765] [2021-01-20 18:11:07,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-20 18:11:07,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:07,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-20 18:11:07,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-20 18:11:07,620 INFO L87 Difference]: Start difference. First operand 16539 states and 48303 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:07,948 INFO L93 Difference]: Finished difference Result 20379 states and 59503 transitions. [2021-01-20 18:11:07,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 18:11:07,949 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-01-20 18:11:07,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:07,950 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-01-20 18:11:07,950 INFO L78 Accepts]: Start accepts. Automaton has 20379 states and 59503 transitions. Word has length 46 [2021-01-20 18:11:07,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:07,950 INFO L481 AbstractCegarLoop]: Abstraction has 20379 states and 59503 transitions. [2021-01-20 18:11:07,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 20379 states and 59503 transitions. [2021-01-20 18:11:07,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 18:11:07,971 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:07,971 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:08,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:08,186 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:08,187 INFO L82 PathProgramCache]: Analyzing trace with hash -443954361, now seen corresponding path program 1 times [2021-01-20 18:11:08,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:08,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198199572] [2021-01-20 18:11:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:08,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198199572] [2021-01-20 18:11:08,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554082060] [2021-01-20 18:11:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-01-20 18:11:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:08,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 18:11:08,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:08,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:08,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:08,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:08,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-01-20 18:11:08,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533538188] [2021-01-20 18:11:08,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:11:08,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:08,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:11:08,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:11:08,658 INFO L87 Difference]: Start difference. First operand 20379 states and 59503 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:09,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:09,263 INFO L93 Difference]: Finished difference Result 29851 states and 87279 transitions. [2021-01-20 18:11:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 18:11:09,264 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-01-20 18:11:09,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:09,265 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-01-20 18:11:09,265 INFO L78 Accepts]: Start accepts. Automaton has 29851 states and 87279 transitions. Word has length 46 [2021-01-20 18:11:09,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:09,266 INFO L481 AbstractCegarLoop]: Abstraction has 29851 states and 87279 transitions. [2021-01-20 18:11:09,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:09,266 INFO L276 IsEmpty]: Start isEmpty. Operand 29851 states and 87279 transitions. [2021-01-20 18:11:09,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:11:09,310 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:09,310 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:09,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:09,525 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:09,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:09,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1795867972, now seen corresponding path program 2 times [2021-01-20 18:11:09,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:09,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690269232] [2021-01-20 18:11:09,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:09,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690269232] [2021-01-20 18:11:09,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538261315] [2021-01-20 18:11:09,784 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 [2021-01-20 18:11:09,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:11:09,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:09,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 18:11:09,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:09,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:09,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:09,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-01-20 18:11:09,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608761061] [2021-01-20 18:11:09,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-20 18:11:09,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:09,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-20 18:11:09,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-20 18:11:09,926 INFO L87 Difference]: Start difference. First operand 29851 states and 87279 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:10,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:10,348 INFO L93 Difference]: Finished difference Result 33691 states and 98543 transitions. [2021-01-20 18:11:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-20 18:11:10,349 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 18:11:10,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:10,350 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-01-20 18:11:10,350 INFO L78 Accepts]: Start accepts. Automaton has 33691 states and 98543 transitions. Word has length 51 [2021-01-20 18:11:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:10,350 INFO L481 AbstractCegarLoop]: Abstraction has 33691 states and 98543 transitions. [2021-01-20 18:11:10,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:10,351 INFO L276 IsEmpty]: Start isEmpty. Operand 33691 states and 98543 transitions. [2021-01-20 18:11:10,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:11:10,377 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:10,377 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:10,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-20 18:11:10,578 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:10,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:10,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1129108430, now seen corresponding path program 3 times [2021-01-20 18:11:10,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:10,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757263638] [2021-01-20 18:11:10,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:10,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757263638] [2021-01-20 18:11:10,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102122516] [2021-01-20 18:11:10,759 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 [2021-01-20 18:11:10,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 18:11:10,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:10,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 18:11:10,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:10,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:10,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:10,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:10,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-20 18:11:10,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228024854] [2021-01-20 18:11:10,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 18:11:10,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:10,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 18:11:10,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:11:10,910 INFO L87 Difference]: Start difference. First operand 33691 states and 98543 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:11,616 INFO L93 Difference]: Finished difference Result 37531 states and 109743 transitions. [2021-01-20 18:11:11,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 18:11:11,617 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 18:11:11,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:11,618 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-01-20 18:11:11,618 INFO L78 Accepts]: Start accepts. Automaton has 37531 states and 109743 transitions. Word has length 51 [2021-01-20 18:11:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:11,618 INFO L481 AbstractCegarLoop]: Abstraction has 37531 states and 109743 transitions. [2021-01-20 18:11:11,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:11,619 INFO L276 IsEmpty]: Start isEmpty. Operand 37531 states and 109743 transitions. [2021-01-20 18:11:11,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:11:11,646 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:11,646 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:11,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:11,848 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:11,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:11,850 INFO L82 PathProgramCache]: Analyzing trace with hash -194830297, now seen corresponding path program 4 times [2021-01-20 18:11:11,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:11,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710990293] [2021-01-20 18:11:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:11,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710990293] [2021-01-20 18:11:11,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841685678] [2021-01-20 18:11:11,976 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 [2021-01-20 18:11:12,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:11:12,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:12,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:11:12,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:12,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:12,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:12,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:12,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-20 18:11:12,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445270399] [2021-01-20 18:11:12,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:11:12,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:12,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:11:12,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:11:12,152 INFO L87 Difference]: Start difference. First operand 37531 states and 109743 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:12,873 INFO L93 Difference]: Finished difference Result 42203 states and 123503 transitions. [2021-01-20 18:11:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 18:11:12,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-01-20 18:11:12,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:12,874 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-01-20 18:11:12,875 INFO L78 Accepts]: Start accepts. Automaton has 42203 states and 123503 transitions. Word has length 51 [2021-01-20 18:11:12,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:12,875 INFO L481 AbstractCegarLoop]: Abstraction has 42203 states and 123503 transitions. [2021-01-20 18:11:12,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:12,875 INFO L276 IsEmpty]: Start isEmpty. Operand 42203 states and 123503 transitions. [2021-01-20 18:11:13,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:11:13,054 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:13,054 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:13,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:13,268 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:13,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:13,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1043229613, now seen corresponding path program 5 times [2021-01-20 18:11:13,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:13,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737000037] [2021-01-20 18:11:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:13,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737000037] [2021-01-20 18:11:13,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865219620] [2021-01-20 18:11:13,448 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 [2021-01-20 18:11:13,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 18:11:13,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:13,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 18:11:13,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:13,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:13,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:13,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-20 18:11:13,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862290571] [2021-01-20 18:11:13,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:11:13,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:13,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:11:13,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:11:13,613 INFO L87 Difference]: Start difference. First operand 42203 states and 123503 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:14,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:14,035 INFO L93 Difference]: Finished difference Result 45787 states and 133999 transitions. [2021-01-20 18:11:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 18:11:14,036 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-20 18:11:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:14,037 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2021-01-20 18:11:14,037 INFO L78 Accepts]: Start accepts. Automaton has 45787 states and 133999 transitions. Word has length 56 [2021-01-20 18:11:14,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:14,037 INFO L481 AbstractCegarLoop]: Abstraction has 45787 states and 133999 transitions. [2021-01-20 18:11:14,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:14,037 INFO L276 IsEmpty]: Start isEmpty. Operand 45787 states and 133999 transitions. [2021-01-20 18:11:14,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:11:14,186 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:14,186 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:14,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-20 18:11:14,400 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:14,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1387222591, now seen corresponding path program 6 times [2021-01-20 18:11:14,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:14,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69038758] [2021-01-20 18:11:14,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:14,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69038758] [2021-01-20 18:11:14,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469655949] [2021-01-20 18:11:14,587 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 [2021-01-20 18:11:14,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 18:11:14,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:14,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 18:11:14,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:14,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:14,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:14,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:14,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-20 18:11:14,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512805814] [2021-01-20 18:11:14,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:11:14,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:14,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:11:14,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:11:14,745 INFO L87 Difference]: Start difference. First operand 45787 states and 133999 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:15,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:15,370 INFO L93 Difference]: Finished difference Result 49243 states and 144111 transitions. [2021-01-20 18:11:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 18:11:15,371 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-20 18:11:15,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:15,372 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-01-20 18:11:15,372 INFO L78 Accepts]: Start accepts. Automaton has 49243 states and 144111 transitions. Word has length 56 [2021-01-20 18:11:15,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:15,373 INFO L481 AbstractCegarLoop]: Abstraction has 49243 states and 144111 transitions. [2021-01-20 18:11:15,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 49243 states and 144111 transitions. [2021-01-20 18:11:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:11:15,414 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:15,414 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:15,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-20 18:11:15,615 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:15,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:15,617 INFO L82 PathProgramCache]: Analyzing trace with hash -23367961, now seen corresponding path program 7 times [2021-01-20 18:11:15,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:15,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321975161] [2021-01-20 18:11:15,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:15,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321975161] [2021-01-20 18:11:15,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407613187] [2021-01-20 18:11:15,798 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 [2021-01-20 18:11:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:15,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 18:11:15,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:16,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:16,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:16,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-20 18:11:16,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727356388] [2021-01-20 18:11:16,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:11:16,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:16,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:11:16,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:11:16,110 INFO L87 Difference]: Start difference. First operand 49243 states and 144111 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:16,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:16,745 INFO L93 Difference]: Finished difference Result 55835 states and 163375 transitions. [2021-01-20 18:11:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-20 18:11:16,745 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-20 18:11:16,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:16,746 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-01-20 18:11:16,746 INFO L78 Accepts]: Start accepts. Automaton has 55835 states and 163375 transitions. Word has length 56 [2021-01-20 18:11:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:16,747 INFO L481 AbstractCegarLoop]: Abstraction has 55835 states and 163375 transitions. [2021-01-20 18:11:16,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 55835 states and 163375 transitions. [2021-01-20 18:11:16,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:11:16,782 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:16,782 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:16,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-20 18:11:16,991 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:16,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:16,992 INFO L82 PathProgramCache]: Analyzing trace with hash 701442583, now seen corresponding path program 8 times [2021-01-20 18:11:16,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:16,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602246976] [2021-01-20 18:11:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:17,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602246976] [2021-01-20 18:11:17,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659516401] [2021-01-20 18:11:17,142 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 [2021-01-20 18:11:17,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:11:17,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:17,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 18:11:17,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:17,236 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:17,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:17,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:17,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-20 18:11:17,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768897604] [2021-01-20 18:11:17,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:11:17,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:17,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:11:17,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:11:17,277 INFO L87 Difference]: Start difference. First operand 55835 states and 163375 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:18,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:18,177 INFO L93 Difference]: Finished difference Result 63947 states and 187079 transitions. [2021-01-20 18:11:18,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 18:11:18,178 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-20 18:11:18,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:18,179 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2021-01-20 18:11:18,179 INFO L78 Accepts]: Start accepts. Automaton has 63947 states and 187079 transitions. Word has length 56 [2021-01-20 18:11:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:18,180 INFO L481 AbstractCegarLoop]: Abstraction has 63947 states and 187079 transitions. [2021-01-20 18:11:18,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:18,180 INFO L276 IsEmpty]: Start isEmpty. Operand 63947 states and 187079 transitions. [2021-01-20 18:11:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:11:18,228 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:18,228 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:18,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-20 18:11:18,429 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:18,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:18,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1901571208, now seen corresponding path program 9 times [2021-01-20 18:11:18,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:18,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065126038] [2021-01-20 18:11:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:18,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065126038] [2021-01-20 18:11:18,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212355303] [2021-01-20 18:11:18,771 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 [2021-01-20 18:11:18,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 18:11:18,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:18,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:11:18,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:18,878 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:18,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:18,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:18,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-01-20 18:11:18,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330096976] [2021-01-20 18:11:18,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:11:18,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:18,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:11:18,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:11:18,929 INFO L87 Difference]: Start difference. First operand 63947 states and 187079 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:19,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:19,948 INFO L93 Difference]: Finished difference Result 69643 states and 203911 transitions. [2021-01-20 18:11:19,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:11:19,948 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-01-20 18:11:19,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:19,949 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=389, Invalid=871, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 18:11:19,950 INFO L78 Accepts]: Start accepts. Automaton has 69643 states and 203911 transitions. Word has length 56 [2021-01-20 18:11:19,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:19,950 INFO L481 AbstractCegarLoop]: Abstraction has 69643 states and 203911 transitions. [2021-01-20 18:11:19,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 69643 states and 203911 transitions. [2021-01-20 18:11:20,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:11:20,003 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:20,004 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:20,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-20 18:11:20,211 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:20,213 INFO L82 PathProgramCache]: Analyzing trace with hash 674124083, now seen corresponding path program 10 times [2021-01-20 18:11:20,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:20,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698977416] [2021-01-20 18:11:20,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:20,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698977416] [2021-01-20 18:11:20,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415020133] [2021-01-20 18:11:20,370 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 [2021-01-20 18:11:20,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:11:20,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:20,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:11:20,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:20,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:20,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:20,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-20 18:11:20,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925101504] [2021-01-20 18:11:20,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:11:20,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:20,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:11:20,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:11:20,490 INFO L87 Difference]: Start difference. First operand 69643 states and 203911 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:21,224 INFO L93 Difference]: Finished difference Result 73995 states and 216711 transitions. [2021-01-20 18:11:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 18:11:21,224 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:11:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:21,225 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2021-01-20 18:11:21,225 INFO L78 Accepts]: Start accepts. Automaton has 73995 states and 216711 transitions. Word has length 61 [2021-01-20 18:11:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:21,225 INFO L481 AbstractCegarLoop]: Abstraction has 73995 states and 216711 transitions. [2021-01-20 18:11:21,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 73995 states and 216711 transitions. [2021-01-20 18:11:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:11:21,277 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:21,277 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:21,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:21,478 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:21,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:21,479 INFO L82 PathProgramCache]: Analyzing trace with hash 330131105, now seen corresponding path program 11 times [2021-01-20 18:11:21,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:21,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102956855] [2021-01-20 18:11:21,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:21,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102956855] [2021-01-20 18:11:21,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899449399] [2021-01-20 18:11:21,627 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 [2021-01-20 18:11:21,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 18:11:21,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:21,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:11:21,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:21,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:21,954 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:21,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:21,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-20 18:11:21,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034456801] [2021-01-20 18:11:21,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:11:21,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:21,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:11:21,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:11:21,973 INFO L87 Difference]: Start difference. First operand 73995 states and 216711 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:22,848 INFO L93 Difference]: Finished difference Result 77451 states and 226823 transitions. [2021-01-20 18:11:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 18:11:22,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:11:22,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:22,850 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=665, Unknown=0, NotChecked=0, Total=930 [2021-01-20 18:11:22,850 INFO L78 Accepts]: Start accepts. Automaton has 77451 states and 226823 transitions. Word has length 61 [2021-01-20 18:11:22,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:22,850 INFO L481 AbstractCegarLoop]: Abstraction has 77451 states and 226823 transitions. [2021-01-20 18:11:22,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:22,850 INFO L276 IsEmpty]: Start isEmpty. Operand 77451 states and 226823 transitions. [2021-01-20 18:11:22,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:11:22,917 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:22,917 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:23,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:23,118 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:23,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:23,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1693985735, now seen corresponding path program 12 times [2021-01-20 18:11:23,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:23,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555753595] [2021-01-20 18:11:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:23,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555753595] [2021-01-20 18:11:23,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781827899] [2021-01-20 18:11:23,273 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 [2021-01-20 18:11:23,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 18:11:23,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:23,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:11:23,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:23,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:23,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:23,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-20 18:11:23,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798150292] [2021-01-20 18:11:23,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:11:23,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:23,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:11:23,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:11:23,403 INFO L87 Difference]: Start difference. First operand 77451 states and 226823 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:23,845 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-01-20 18:11:24,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:24,504 INFO L93 Difference]: Finished difference Result 84043 states and 246087 transitions. [2021-01-20 18:11:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 18:11:24,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:11:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:24,506 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2021-01-20 18:11:24,506 INFO L78 Accepts]: Start accepts. Automaton has 84043 states and 246087 transitions. Word has length 61 [2021-01-20 18:11:24,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:24,506 INFO L481 AbstractCegarLoop]: Abstraction has 84043 states and 246087 transitions. [2021-01-20 18:11:24,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:24,506 INFO L276 IsEmpty]: Start isEmpty. Operand 84043 states and 246087 transitions. [2021-01-20 18:11:24,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:11:24,562 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:24,562 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:24,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-20 18:11:24,764 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:24,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:24,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1876171017, now seen corresponding path program 13 times [2021-01-20 18:11:24,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:24,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818369235] [2021-01-20 18:11:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:24,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818369235] [2021-01-20 18:11:24,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932663668] [2021-01-20 18:11:24,912 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 [2021-01-20 18:11:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:25,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:11:25,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:25,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:25,071 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:25,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:25,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-20 18:11:25,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557389668] [2021-01-20 18:11:25,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:11:25,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:25,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:11:25,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:11:25,087 INFO L87 Difference]: Start difference. First operand 84043 states and 246087 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:26,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:26,338 INFO L93 Difference]: Finished difference Result 87755 states and 256903 transitions. [2021-01-20 18:11:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 18:11:26,339 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:11:26,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:26,340 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 18:11:26,340 INFO L78 Accepts]: Start accepts. Automaton has 87755 states and 256903 transitions. Word has length 61 [2021-01-20 18:11:26,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:26,340 INFO L481 AbstractCegarLoop]: Abstraction has 87755 states and 256903 transitions. [2021-01-20 18:11:26,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:26,340 INFO L276 IsEmpty]: Start isEmpty. Operand 87755 states and 256903 transitions. [2021-01-20 18:11:26,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:11:26,407 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:26,407 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:26,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:26,615 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:26,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:26,616 INFO L82 PathProgramCache]: Analyzing trace with hash -184217512, now seen corresponding path program 14 times [2021-01-20 18:11:26,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:26,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281547960] [2021-01-20 18:11:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:27,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281547960] [2021-01-20 18:11:27,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487377266] [2021-01-20 18:11:27,018 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 [2021-01-20 18:11:27,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:11:27,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:27,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:11:27,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:27,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:27,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:27,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:27,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-20 18:11:27,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086309759] [2021-01-20 18:11:27,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:11:27,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:27,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:11:27,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:11:27,229 INFO L87 Difference]: Start difference. First operand 87755 states and 256903 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:28,211 INFO L93 Difference]: Finished difference Result 93963 states and 275271 transitions. [2021-01-20 18:11:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:11:28,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-01-20 18:11:28,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:28,213 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=926, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 18:11:28,213 INFO L78 Accepts]: Start accepts. Automaton has 93963 states and 275271 transitions. Word has length 61 [2021-01-20 18:11:28,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:28,213 INFO L481 AbstractCegarLoop]: Abstraction has 93963 states and 275271 transitions. [2021-01-20 18:11:28,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:28,213 INFO L276 IsEmpty]: Start isEmpty. Operand 93963 states and 275271 transitions. [2021-01-20 18:11:28,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:11:28,688 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:28,688 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:28,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-20 18:11:28,903 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:28,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:28,904 INFO L82 PathProgramCache]: Analyzing trace with hash -446375550, now seen corresponding path program 15 times [2021-01-20 18:11:28,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:28,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701739800] [2021-01-20 18:11:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:29,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701739800] [2021-01-20 18:11:29,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052172866] [2021-01-20 18:11:29,095 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 [2021-01-20 18:11:29,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 18:11:29,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:29,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:11:29,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:29,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:29,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:29,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 18:11:29,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131177958] [2021-01-20 18:11:29,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:11:29,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:29,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:11:29,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:11:29,242 INFO L87 Difference]: Start difference. First operand 93963 states and 275271 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:30,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:30,135 INFO L93 Difference]: Finished difference Result 97803 states and 286535 transitions. [2021-01-20 18:11:30,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 18:11:30,136 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:11:30,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:30,137 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=560, Unknown=0, NotChecked=0, Total=812 [2021-01-20 18:11:30,137 INFO L78 Accepts]: Start accepts. Automaton has 97803 states and 286535 transitions. Word has length 66 [2021-01-20 18:11:30,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:30,140 INFO L481 AbstractCegarLoop]: Abstraction has 97803 states and 286535 transitions. [2021-01-20 18:11:30,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:30,141 INFO L276 IsEmpty]: Start isEmpty. Operand 97803 states and 286535 transitions. [2021-01-20 18:11:30,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:11:30,277 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:30,277 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:30,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-20 18:11:30,492 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:30,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:30,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2064809328, now seen corresponding path program 16 times [2021-01-20 18:11:30,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:30,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55908475] [2021-01-20 18:11:30,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:30,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55908475] [2021-01-20 18:11:30,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024081891] [2021-01-20 18:11:30,994 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 [2021-01-20 18:11:31,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:11:31,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:31,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:11:31,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:31,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:31,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:31,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:31,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-20 18:11:31,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710807658] [2021-01-20 18:11:31,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:11:31,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:31,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:11:31,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:11:31,228 INFO L87 Difference]: Start difference. First operand 97803 states and 286535 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:32,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:32,060 INFO L93 Difference]: Finished difference Result 101515 states and 297415 transitions. [2021-01-20 18:11:32,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 18:11:32,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:11:32,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:32,061 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 18:11:32,061 INFO L78 Accepts]: Start accepts. Automaton has 101515 states and 297415 transitions. Word has length 66 [2021-01-20 18:11:32,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:32,062 INFO L481 AbstractCegarLoop]: Abstraction has 101515 states and 297415 transitions. [2021-01-20 18:11:32,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:32,062 INFO L276 IsEmpty]: Start isEmpty. Operand 101515 states and 297415 transitions. [2021-01-20 18:11:32,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:11:32,138 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:32,138 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:32,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-20 18:11:32,348 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:32,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:32,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1331530518, now seen corresponding path program 17 times [2021-01-20 18:11:32,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:32,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560416877] [2021-01-20 18:11:32,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:32,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560416877] [2021-01-20 18:11:32,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979981714] [2021-01-20 18:11:32,511 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 [2021-01-20 18:11:32,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 18:11:32,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:32,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:11:32,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:32,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:32,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:32,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 18:11:32,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184862076] [2021-01-20 18:11:32,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:11:32,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:32,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:11:32,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:11:32,632 INFO L87 Difference]: Start difference. First operand 101515 states and 297415 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:33,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:33,811 INFO L93 Difference]: Finished difference Result 105355 states and 308679 transitions. [2021-01-20 18:11:33,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 18:11:33,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:11:33,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:33,812 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=769, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 18:11:33,812 INFO L78 Accepts]: Start accepts. Automaton has 105355 states and 308679 transitions. Word has length 66 [2021-01-20 18:11:33,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:33,812 INFO L481 AbstractCegarLoop]: Abstraction has 105355 states and 308679 transitions. [2021-01-20 18:11:33,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:33,813 INFO L276 IsEmpty]: Start isEmpty. Operand 105355 states and 308679 transitions. [2021-01-20 18:11:33,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:11:33,888 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:33,888 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:34,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-20 18:11:34,089 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:34,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1346701894, now seen corresponding path program 18 times [2021-01-20 18:11:34,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:34,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5748483] [2021-01-20 18:11:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:34,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5748483] [2021-01-20 18:11:34,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224820552] [2021-01-20 18:11:34,265 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 [2021-01-20 18:11:34,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 18:11:34,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:34,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:11:34,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:34,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:34,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:34,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:34,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-20 18:11:34,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802805928] [2021-01-20 18:11:34,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:11:34,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:34,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:11:34,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:11:34,408 INFO L87 Difference]: Start difference. First operand 105355 states and 308679 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:34,980 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2021-01-20 18:11:35,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:35,672 INFO L93 Difference]: Finished difference Result 112523 states and 329671 transitions. [2021-01-20 18:11:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 18:11:35,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:11:35,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:35,673 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=352, Invalid=908, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 18:11:35,673 INFO L78 Accepts]: Start accepts. Automaton has 112523 states and 329671 transitions. Word has length 66 [2021-01-20 18:11:35,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:35,673 INFO L481 AbstractCegarLoop]: Abstraction has 112523 states and 329671 transitions. [2021-01-20 18:11:35,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:35,674 INFO L276 IsEmpty]: Start isEmpty. Operand 112523 states and 329671 transitions. [2021-01-20 18:11:35,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:11:35,753 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:35,753 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:35,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-20 18:11:35,954 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:35,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:35,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1492528600, now seen corresponding path program 19 times [2021-01-20 18:11:35,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:35,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948100858] [2021-01-20 18:11:35,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:36,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948100858] [2021-01-20 18:11:36,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853730724] [2021-01-20 18:11:36,097 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 [2021-01-20 18:11:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:36,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:11:36,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:36,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:36,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:36,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 18:11:36,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316153684] [2021-01-20 18:11:36,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:11:36,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:36,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:11:36,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:11:36,215 INFO L87 Difference]: Start difference. First operand 112523 states and 329671 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:37,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:37,605 INFO L93 Difference]: Finished difference Result 119115 states and 348935 transitions. [2021-01-20 18:11:37,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:11:37,606 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:11:37,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:37,607 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=897, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 18:11:37,607 INFO L78 Accepts]: Start accepts. Automaton has 119115 states and 348935 transitions. Word has length 66 [2021-01-20 18:11:37,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:37,608 INFO L481 AbstractCegarLoop]: Abstraction has 119115 states and 348935 transitions. [2021-01-20 18:11:37,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:37,608 INFO L276 IsEmpty]: Start isEmpty. Operand 119115 states and 348935 transitions. [2021-01-20 18:11:37,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:11:37,714 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:37,714 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:37,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:37,915 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:37,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:37,916 INFO L82 PathProgramCache]: Analyzing trace with hash -2077628152, now seen corresponding path program 20 times [2021-01-20 18:11:37,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:37,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990639413] [2021-01-20 18:11:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:38,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990639413] [2021-01-20 18:11:38,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669289691] [2021-01-20 18:11:38,077 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 [2021-01-20 18:11:38,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:11:38,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:38,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:11:38,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:38,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:38,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:38,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:38,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-20 18:11:38,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309823202] [2021-01-20 18:11:38,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:11:38,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:38,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:11:38,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:11:38,232 INFO L87 Difference]: Start difference. First operand 119115 states and 348935 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:39,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:39,790 INFO L93 Difference]: Finished difference Result 122827 states and 359751 transitions. [2021-01-20 18:11:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 18:11:39,791 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:11:39,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:39,792 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=395, Invalid=1011, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:11:39,792 INFO L78 Accepts]: Start accepts. Automaton has 122827 states and 359751 transitions. Word has length 66 [2021-01-20 18:11:39,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:39,792 INFO L481 AbstractCegarLoop]: Abstraction has 122827 states and 359751 transitions. [2021-01-20 18:11:39,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:39,792 INFO L276 IsEmpty]: Start isEmpty. Operand 122827 states and 359751 transitions. [2021-01-20 18:11:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:11:39,875 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:39,875 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:40,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-20 18:11:40,085 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:40,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:40,086 INFO L82 PathProgramCache]: Analyzing trace with hash -385674647, now seen corresponding path program 21 times [2021-01-20 18:11:40,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:40,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182996588] [2021-01-20 18:11:40,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:40,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182996588] [2021-01-20 18:11:40,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819928267] [2021-01-20 18:11:40,236 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 [2021-01-20 18:11:40,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 18:11:40,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:40,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:11:40,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:40,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:40,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:40,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:40,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-20 18:11:40,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148682341] [2021-01-20 18:11:40,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:11:40,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:40,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:11:40,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:11:40,374 INFO L87 Difference]: Start difference. First operand 122827 states and 359751 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:42,041 INFO L93 Difference]: Finished difference Result 130315 states and 381959 transitions. [2021-01-20 18:11:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 18:11:42,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-01-20 18:11:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:42,043 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=582, Invalid=1310, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 18:11:42,043 INFO L78 Accepts]: Start accepts. Automaton has 130315 states and 381959 transitions. Word has length 66 [2021-01-20 18:11:42,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:42,043 INFO L481 AbstractCegarLoop]: Abstraction has 130315 states and 381959 transitions. [2021-01-20 18:11:42,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:42,044 INFO L276 IsEmpty]: Start isEmpty. Operand 130315 states and 381959 transitions. [2021-01-20 18:11:42,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:11:42,154 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:42,154 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:42,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:42,355 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:42,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:42,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1143144034, now seen corresponding path program 22 times [2021-01-20 18:11:42,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:42,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894546430] [2021-01-20 18:11:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:42,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894546430] [2021-01-20 18:11:42,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755594828] [2021-01-20 18:11:42,524 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 [2021-01-20 18:11:42,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:11:42,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:42,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:11:42,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:42,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:42,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:42,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-20 18:11:42,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110819957] [2021-01-20 18:11:42,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:11:42,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:42,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:11:42,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:11:42,630 INFO L87 Difference]: Start difference. First operand 130315 states and 381959 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:43,677 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-01-20 18:11:44,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:44,068 INFO L93 Difference]: Finished difference Result 135179 states and 396295 transitions. [2021-01-20 18:11:44,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 18:11:44,068 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:11:44,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:44,069 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=288, Invalid=704, Unknown=0, NotChecked=0, Total=992 [2021-01-20 18:11:44,069 INFO L78 Accepts]: Start accepts. Automaton has 135179 states and 396295 transitions. Word has length 71 [2021-01-20 18:11:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:44,069 INFO L481 AbstractCegarLoop]: Abstraction has 135179 states and 396295 transitions. [2021-01-20 18:11:44,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:44,070 INFO L276 IsEmpty]: Start isEmpty. Operand 135179 states and 396295 transitions. [2021-01-20 18:11:44,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:11:44,176 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:44,177 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:44,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-20 18:11:44,381 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:44,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:44,382 INFO L82 PathProgramCache]: Analyzing trace with hash -640638384, now seen corresponding path program 23 times [2021-01-20 18:11:44,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:44,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918715181] [2021-01-20 18:11:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:44,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918715181] [2021-01-20 18:11:44,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565157581] [2021-01-20 18:11:44,577 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 [2021-01-20 18:11:44,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 18:11:44,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:44,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:11:44,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:44,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:44,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:44,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:44,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 18:11:44,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660788609] [2021-01-20 18:11:44,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:11:44,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:44,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:11:44,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:11:44,695 INFO L87 Difference]: Start difference. First operand 135179 states and 396295 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:46,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:46,456 INFO L93 Difference]: Finished difference Result 138891 states and 407175 transitions. [2021-01-20 18:11:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:11:46,456 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:11:46,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:46,457 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=373, Invalid=959, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 18:11:46,457 INFO L78 Accepts]: Start accepts. Automaton has 138891 states and 407175 transitions. Word has length 71 [2021-01-20 18:11:46,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:46,458 INFO L481 AbstractCegarLoop]: Abstraction has 138891 states and 407175 transitions. [2021-01-20 18:11:46,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand 138891 states and 407175 transitions. [2021-01-20 18:11:46,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:11:46,601 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:46,601 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:46,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:46,802 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:46,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:46,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1373917194, now seen corresponding path program 24 times [2021-01-20 18:11:46,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:46,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391000735] [2021-01-20 18:11:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:46,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391000735] [2021-01-20 18:11:46,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657586361] [2021-01-20 18:11:46,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 18:11:47,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 18:11:47,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:47,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:11:47,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:47,098 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:47,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:47,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-20 18:11:47,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94845985] [2021-01-20 18:11:47,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:11:47,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:47,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:11:47,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:11:47,115 INFO L87 Difference]: Start difference. First operand 138891 states and 407175 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:48,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:48,788 INFO L93 Difference]: Finished difference Result 142731 states and 418439 transitions. [2021-01-20 18:11:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 18:11:48,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:11:48,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:48,791 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=313, Invalid=809, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 18:11:48,791 INFO L78 Accepts]: Start accepts. Automaton has 142731 states and 418439 transitions. Word has length 71 [2021-01-20 18:11:48,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:48,791 INFO L481 AbstractCegarLoop]: Abstraction has 142731 states and 418439 transitions. [2021-01-20 18:11:48,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:48,791 INFO L276 IsEmpty]: Start isEmpty. Operand 142731 states and 418439 transitions. [2021-01-20 18:11:48,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:11:48,903 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:48,903 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:49,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-20 18:11:49,114 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:49,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:49,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1358745818, now seen corresponding path program 25 times [2021-01-20 18:11:49,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:49,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002342853] [2021-01-20 18:11:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:49,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002342853] [2021-01-20 18:11:49,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036116778] [2021-01-20 18:11:49,308 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 [2021-01-20 18:11:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:49,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:11:49,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:49,406 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:49,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:49,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:49,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 18:11:49,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524922460] [2021-01-20 18:11:49,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:11:49,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:49,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:11:49,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:11:49,432 INFO L87 Difference]: Start difference. First operand 142731 states and 418439 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:51,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:51,254 INFO L93 Difference]: Finished difference Result 146059 states and 428167 transitions. [2021-01-20 18:11:51,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:11:51,256 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:11:51,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:51,256 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=1076, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 18:11:51,257 INFO L78 Accepts]: Start accepts. Automaton has 146059 states and 428167 transitions. Word has length 71 [2021-01-20 18:11:51,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:51,257 INFO L481 AbstractCegarLoop]: Abstraction has 146059 states and 428167 transitions. [2021-01-20 18:11:51,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:51,257 INFO L276 IsEmpty]: Start isEmpty. Operand 146059 states and 428167 transitions. [2021-01-20 18:11:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:11:51,378 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:51,378 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:51,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:51,579 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:51,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:51,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1212919112, now seen corresponding path program 26 times [2021-01-20 18:11:51,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:51,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575449897] [2021-01-20 18:11:51,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:51,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575449897] [2021-01-20 18:11:51,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474574237] [2021-01-20 18:11:51,728 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 [2021-01-20 18:11:51,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:11:51,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:51,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:11:51,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:51,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:51,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:51,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-20 18:11:51,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19056012] [2021-01-20 18:11:51,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:11:51,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:51,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:11:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:11:51,838 INFO L87 Difference]: Start difference. First operand 146059 states and 428167 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:53,594 INFO L93 Difference]: Finished difference Result 152651 states and 447431 transitions. [2021-01-20 18:11:53,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:11:53,595 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:11:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:53,596 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 18:11:53,596 INFO L78 Accepts]: Start accepts. Automaton has 152651 states and 447431 transitions. Word has length 71 [2021-01-20 18:11:53,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:53,596 INFO L481 AbstractCegarLoop]: Abstraction has 152651 states and 447431 transitions. [2021-01-20 18:11:53,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:53,596 INFO L276 IsEmpty]: Start isEmpty. Operand 152651 states and 447431 transitions. [2021-01-20 18:11:53,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:11:53,720 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:53,720 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:53,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-20 18:11:53,934 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:53,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:53,935 INFO L82 PathProgramCache]: Analyzing trace with hash -488108568, now seen corresponding path program 27 times [2021-01-20 18:11:53,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:53,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152893875] [2021-01-20 18:11:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:54,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152893875] [2021-01-20 18:11:54,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148662836] [2021-01-20 18:11:54,122 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 [2021-01-20 18:11:54,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 18:11:54,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:54,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:11:54,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:54,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:11:54,239 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-20 18:11:54,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:54,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 18:11:54,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681529564] [2021-01-20 18:11:54,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:11:54,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:54,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:11:54,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:11:54,250 INFO L87 Difference]: Start difference. First operand 152651 states and 447431 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:56,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:56,577 INFO L93 Difference]: Finished difference Result 156363 states and 458247 transitions. [2021-01-20 18:11:56,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:11:56,577 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:11:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:56,579 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=1181, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 18:11:56,579 INFO L78 Accepts]: Start accepts. Automaton has 156363 states and 458247 transitions. Word has length 71 [2021-01-20 18:11:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:56,579 INFO L481 AbstractCegarLoop]: Abstraction has 156363 states and 458247 transitions. [2021-01-20 18:11:56,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:56,580 INFO L276 IsEmpty]: Start isEmpty. Operand 156363 states and 458247 transitions. [2021-01-20 18:11:56,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:11:56,739 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:56,740 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:56,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:11:56,955 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:56,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:56,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1203844937, now seen corresponding path program 28 times [2021-01-20 18:11:56,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:56,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277510875] [2021-01-20 18:11:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:11:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:57,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277510875] [2021-01-20 18:11:57,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627113302] [2021-01-20 18:11:57,134 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 [2021-01-20 18:11:57,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:11:57,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:11:57,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:11:57,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:11:57,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:57,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:11:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:11:57,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:11:57,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 18:11:57,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358058092] [2021-01-20 18:11:57,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:11:57,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:11:57,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:11:57,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:11:57,288 INFO L87 Difference]: Start difference. First operand 156363 states and 458247 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:59,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:11:59,466 INFO L93 Difference]: Finished difference Result 158411 states and 464263 transitions. [2021-01-20 18:11:59,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 18:11:59,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-01-20 18:11:59,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:11:59,467 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=529, Invalid=1111, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 18:11:59,467 INFO L78 Accepts]: Start accepts. Automaton has 158411 states and 464263 transitions. Word has length 71 [2021-01-20 18:11:59,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:11:59,467 INFO L481 AbstractCegarLoop]: Abstraction has 158411 states and 464263 transitions. [2021-01-20 18:11:59,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:11:59,468 INFO L276 IsEmpty]: Start isEmpty. Operand 158411 states and 464263 transitions. [2021-01-20 18:11:59,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:11:59,625 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:11:59,626 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:11:59,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-20 18:11:59,827 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:11:59,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:11:59,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1682215820, now seen corresponding path program 29 times [2021-01-20 18:11:59,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:11:59,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695685952] [2021-01-20 18:11:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:11:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:00,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695685952] [2021-01-20 18:12:00,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872965689] [2021-01-20 18:12:00,059 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 [2021-01-20 18:12:00,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-20 18:12:00,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:00,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:12:00,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:00,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:00,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:00,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:12:00,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845018539] [2021-01-20 18:12:00,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:12:00,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:00,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:12:00,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:12:00,193 INFO L87 Difference]: Start difference. First operand 158411 states and 464263 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:01,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:01,994 INFO L93 Difference]: Finished difference Result 164427 states and 482055 transitions. [2021-01-20 18:12:01,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 18:12:01,995 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:12:01,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:01,996 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 18:12:01,996 INFO L78 Accepts]: Start accepts. Automaton has 164427 states and 482055 transitions. Word has length 76 [2021-01-20 18:12:01,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:01,996 INFO L481 AbstractCegarLoop]: Abstraction has 164427 states and 482055 transitions. [2021-01-20 18:12:01,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:01,996 INFO L276 IsEmpty]: Start isEmpty. Operand 164427 states and 482055 transitions. [2021-01-20 18:12:02,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:12:02,145 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:02,145 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:02,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-20 18:12:02,346 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:02,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:02,347 INFO L82 PathProgramCache]: Analyzing trace with hash 247870558, now seen corresponding path program 30 times [2021-01-20 18:12:02,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:02,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279170507] [2021-01-20 18:12:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:02,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279170507] [2021-01-20 18:12:02,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087052340] [2021-01-20 18:12:02,579 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 [2021-01-20 18:12:02,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-20 18:12:02,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:02,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:12:02,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:02,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:12:02,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:02,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:02,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-20 18:12:02,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770587019] [2021-01-20 18:12:02,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:12:02,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:02,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:12:02,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:12:02,739 INFO L87 Difference]: Start difference. First operand 164427 states and 482055 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:04,668 INFO L93 Difference]: Finished difference Result 169419 states and 496775 transitions. [2021-01-20 18:12:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:12:04,669 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:12:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:04,670 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=535, Invalid=1357, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 18:12:04,670 INFO L78 Accepts]: Start accepts. Automaton has 169419 states and 496775 transitions. Word has length 76 [2021-01-20 18:12:04,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:04,670 INFO L481 AbstractCegarLoop]: Abstraction has 169419 states and 496775 transitions. [2021-01-20 18:12:04,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:04,670 INFO L276 IsEmpty]: Start isEmpty. Operand 169419 states and 496775 transitions. [2021-01-20 18:12:04,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:12:04,819 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:04,820 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:05,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-20 18:12:05,021 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:05,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:05,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2074066552, now seen corresponding path program 31 times [2021-01-20 18:12:05,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:05,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23860412] [2021-01-20 18:12:05,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:05,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23860412] [2021-01-20 18:12:05,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589208853] [2021-01-20 18:12:05,215 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 [2021-01-20 18:12:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:05,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:12:05,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:05,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:05,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:05,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:12:05,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463713727] [2021-01-20 18:12:05,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:12:05,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:05,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:12:05,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:12:05,328 INFO L87 Difference]: Start difference. First operand 169419 states and 496775 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:07,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:07,283 INFO L93 Difference]: Finished difference Result 174539 states and 511879 transitions. [2021-01-20 18:12:07,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:12:07,283 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:12:07,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:07,284 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=458, Invalid=1182, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 18:12:07,284 INFO L78 Accepts]: Start accepts. Automaton has 174539 states and 511879 transitions. Word has length 76 [2021-01-20 18:12:07,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:07,285 INFO L481 AbstractCegarLoop]: Abstraction has 174539 states and 511879 transitions. [2021-01-20 18:12:07,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand 174539 states and 511879 transitions. [2021-01-20 18:12:07,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:12:07,484 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:07,484 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:07,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-20 18:12:07,685 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:07,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:07,686 INFO L82 PathProgramCache]: Analyzing trace with hash -59228856, now seen corresponding path program 32 times [2021-01-20 18:12:07,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:07,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989911490] [2021-01-20 18:12:07,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:07,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989911490] [2021-01-20 18:12:07,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311096215] [2021-01-20 18:12:07,927 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 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 [2021-01-20 18:12:08,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:12:08,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:08,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:12:08,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:08,037 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:12:08,083 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:08,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:08,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-20 18:12:08,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168799885] [2021-01-20 18:12:08,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:12:08,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:08,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:12:08,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:12:08,098 INFO L87 Difference]: Start difference. First operand 174539 states and 511879 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:10,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:10,484 INFO L93 Difference]: Finished difference Result 178763 states and 524295 transitions. [2021-01-20 18:12:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 18:12:10,485 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:12:10,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:10,486 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=565, Invalid=1505, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 18:12:10,486 INFO L78 Accepts]: Start accepts. Automaton has 178763 states and 524295 transitions. Word has length 76 [2021-01-20 18:12:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:10,487 INFO L481 AbstractCegarLoop]: Abstraction has 178763 states and 524295 transitions. [2021-01-20 18:12:10,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 178763 states and 524295 transitions. [2021-01-20 18:12:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:12:10,637 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:10,637 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:10,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:10,838 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:10,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:10,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1831372022, now seen corresponding path program 33 times [2021-01-20 18:12:10,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:10,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520901167] [2021-01-20 18:12:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:11,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520901167] [2021-01-20 18:12:11,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285387995] [2021-01-20 18:12:11,023 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 [2021-01-20 18:12:11,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 18:12:11,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:11,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:12:11,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:11,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:11,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:11,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:12:11,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578794789] [2021-01-20 18:12:11,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:12:11,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:11,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:12:11,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:12:11,154 INFO L87 Difference]: Start difference. First operand 178763 states and 524295 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:13,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:13,192 INFO L93 Difference]: Finished difference Result 183371 states and 537863 transitions. [2021-01-20 18:12:13,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:12:13,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:12:13,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:13,193 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 18:12:13,193 INFO L78 Accepts]: Start accepts. Automaton has 183371 states and 537863 transitions. Word has length 76 [2021-01-20 18:12:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:13,194 INFO L481 AbstractCegarLoop]: Abstraction has 183371 states and 537863 transitions. [2021-01-20 18:12:13,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 183371 states and 537863 transitions. [2021-01-20 18:12:13,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:12:13,343 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:13,344 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:13,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-20 18:12:13,545 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:13,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:13,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1241888826, now seen corresponding path program 34 times [2021-01-20 18:12:13,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:13,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567618479] [2021-01-20 18:12:13,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:13,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567618479] [2021-01-20 18:12:13,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620679040] [2021-01-20 18:12:13,735 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 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 [2021-01-20 18:12:13,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:12:13,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:13,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:12:13,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:13,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:12:13,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:13,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:13,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-20 18:12:13,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190159888] [2021-01-20 18:12:13,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:12:13,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:13,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:12:13,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:12:13,895 INFO L87 Difference]: Start difference. First operand 183371 states and 537863 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:16,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:16,182 INFO L93 Difference]: Finished difference Result 187083 states and 548743 transitions. [2021-01-20 18:12:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:12:16,183 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:12:16,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:16,184 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=615, Invalid=1641, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 18:12:16,184 INFO L78 Accepts]: Start accepts. Automaton has 187083 states and 548743 transitions. Word has length 76 [2021-01-20 18:12:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:16,184 INFO L481 AbstractCegarLoop]: Abstraction has 187083 states and 548743 transitions. [2021-01-20 18:12:16,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 187083 states and 548743 transitions. [2021-01-20 18:12:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:12:16,334 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:16,334 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:16,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-20 18:12:16,535 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:16,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:16,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1963045108, now seen corresponding path program 35 times [2021-01-20 18:12:16,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:16,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352959661] [2021-01-20 18:12:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:16,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352959661] [2021-01-20 18:12:16,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050836513] [2021-01-20 18:12:16,723 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 [2021-01-20 18:12:16,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-20 18:12:16,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:16,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:12:16,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:16,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:16,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:16,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:12:16,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086336925] [2021-01-20 18:12:16,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:12:16,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:16,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:12:16,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:12:16,855 INFO L87 Difference]: Start difference. First operand 187083 states and 548743 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:19,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:19,126 INFO L93 Difference]: Finished difference Result 197579 states and 579463 transitions. [2021-01-20 18:12:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 18:12:19,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:12:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:19,128 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=562, Invalid=1418, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:12:19,128 INFO L78 Accepts]: Start accepts. Automaton has 197579 states and 579463 transitions. Word has length 76 [2021-01-20 18:12:19,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:19,128 INFO L481 AbstractCegarLoop]: Abstraction has 197579 states and 579463 transitions. [2021-01-20 18:12:19,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:19,129 INFO L276 IsEmpty]: Start isEmpty. Operand 197579 states and 579463 transitions. [2021-01-20 18:12:19,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:12:19,321 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:19,321 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:19,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:19,529 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:19,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1412319292, now seen corresponding path program 36 times [2021-01-20 18:12:19,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:19,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533044895] [2021-01-20 18:12:19,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:19,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533044895] [2021-01-20 18:12:19,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915341364] [2021-01-20 18:12:19,731 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 [2021-01-20 18:12:19,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-20 18:12:19,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:19,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:12:19,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:19,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:12:19,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:19,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:19,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-20 18:12:19,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479452519] [2021-01-20 18:12:19,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:12:19,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:19,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:12:19,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:12:19,902 INFO L87 Difference]: Start difference. First operand 197579 states and 579463 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:21,540 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2021-01-20 18:12:22,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:22,468 INFO L93 Difference]: Finished difference Result 202315 states and 593287 transitions. [2021-01-20 18:12:22,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 18:12:22,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:12:22,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:22,470 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=685, Invalid=1765, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 18:12:22,470 INFO L78 Accepts]: Start accepts. Automaton has 202315 states and 593287 transitions. Word has length 76 [2021-01-20 18:12:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:22,470 INFO L481 AbstractCegarLoop]: Abstraction has 202315 states and 593287 transitions. [2021-01-20 18:12:22,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 202315 states and 593287 transitions. [2021-01-20 18:12:22,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:12:22,616 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:22,617 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:22,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-20 18:12:22,818 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:22,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:22,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1060243374, now seen corresponding path program 37 times [2021-01-20 18:12:22,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:22,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601536774] [2021-01-20 18:12:22,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:22,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601536774] [2021-01-20 18:12:22,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876377063] [2021-01-20 18:12:22,989 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 [2021-01-20 18:12:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:23,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:12:23,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:23,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:23,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:23,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:12:23,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924927407] [2021-01-20 18:12:23,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:12:23,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:23,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:12:23,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:12:23,117 INFO L87 Difference]: Start difference. First operand 202315 states and 593287 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:25,465 INFO L93 Difference]: Finished difference Result 207179 states and 607559 transitions. [2021-01-20 18:12:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:12:25,466 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:12:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:25,467 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=644, Invalid=1518, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 18:12:25,467 INFO L78 Accepts]: Start accepts. Automaton has 207179 states and 607559 transitions. Word has length 76 [2021-01-20 18:12:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:25,467 INFO L481 AbstractCegarLoop]: Abstraction has 207179 states and 607559 transitions. [2021-01-20 18:12:25,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 207179 states and 607559 transitions. [2021-01-20 18:12:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:12:25,615 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:25,615 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:25,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:25,816 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:25,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:25,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1063216604, now seen corresponding path program 38 times [2021-01-20 18:12:25,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:25,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175641337] [2021-01-20 18:12:25,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:26,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175641337] [2021-01-20 18:12:26,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927042757] [2021-01-20 18:12:26,017 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 [2021-01-20 18:12:26,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:12:26,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:26,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:12:26,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:26,174 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:12:26,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:26,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:26,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-20 18:12:26,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864272027] [2021-01-20 18:12:26,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:12:26,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:26,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:12:26,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:12:26,231 INFO L87 Difference]: Start difference. First operand 207179 states and 607559 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:27,426 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2021-01-20 18:12:29,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:29,272 INFO L93 Difference]: Finished difference Result 208523 states and 611399 transitions. [2021-01-20 18:12:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 18:12:29,273 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-01-20 18:12:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:29,274 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=816, Invalid=2046, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 18:12:29,274 INFO L78 Accepts]: Start accepts. Automaton has 208523 states and 611399 transitions. Word has length 76 [2021-01-20 18:12:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:29,275 INFO L481 AbstractCegarLoop]: Abstraction has 208523 states and 611399 transitions. [2021-01-20 18:12:29,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 208523 states and 611399 transitions. [2021-01-20 18:12:30,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:12:30,349 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:30,349 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:30,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-20 18:12:30,550 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:30,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:30,551 INFO L82 PathProgramCache]: Analyzing trace with hash -298810531, now seen corresponding path program 39 times [2021-01-20 18:12:30,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:30,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795016545] [2021-01-20 18:12:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:30,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795016545] [2021-01-20 18:12:30,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547784705] [2021-01-20 18:12:30,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-20 18:12:30,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 18:12:30,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:30,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:12:30,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:30,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:30,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:30,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:12:30,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670725056] [2021-01-20 18:12:30,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:12:30,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:30,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:12:30,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:12:30,963 INFO L87 Difference]: Start difference. First operand 208523 states and 611399 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:32,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:32,355 INFO L93 Difference]: Finished difference Result 212747 states and 623815 transitions. [2021-01-20 18:12:32,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:12:32,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:12:32,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:32,357 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=504, Invalid=1136, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 18:12:32,357 INFO L78 Accepts]: Start accepts. Automaton has 212747 states and 623815 transitions. Word has length 81 [2021-01-20 18:12:32,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:32,358 INFO L481 AbstractCegarLoop]: Abstraction has 212747 states and 623815 transitions. [2021-01-20 18:12:32,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:32,358 INFO L276 IsEmpty]: Start isEmpty. Operand 212747 states and 623815 transitions. [2021-01-20 18:12:33,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:12:33,402 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:33,402 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:33,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:33,613 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:33,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:33,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1053083055, now seen corresponding path program 40 times [2021-01-20 18:12:33,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:33,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754892046] [2021-01-20 18:12:33,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:33,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754892046] [2021-01-20 18:12:33,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668865728] [2021-01-20 18:12:33,872 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 [2021-01-20 18:12:33,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:12:33,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:33,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:12:33,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:33,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:12:34,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:34,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:34,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:12:34,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981521647] [2021-01-20 18:12:34,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:12:34,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:34,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:12:34,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:12:34,021 INFO L87 Difference]: Start difference. First operand 212747 states and 623815 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:36,150 INFO L93 Difference]: Finished difference Result 216715 states and 635463 transitions. [2021-01-20 18:12:36,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:12:36,150 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:12:36,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:36,153 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=545, Invalid=1435, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:12:36,153 INFO L78 Accepts]: Start accepts. Automaton has 216715 states and 635463 transitions. Word has length 81 [2021-01-20 18:12:36,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:36,154 INFO L481 AbstractCegarLoop]: Abstraction has 216715 states and 635463 transitions. [2021-01-20 18:12:36,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:36,154 INFO L276 IsEmpty]: Start isEmpty. Operand 216715 states and 635463 transitions. [2021-01-20 18:12:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:12:36,377 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:36,377 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:36,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-20 18:12:36,578 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:36,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:36,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1745619127, now seen corresponding path program 41 times [2021-01-20 18:12:36,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:36,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853731569] [2021-01-20 18:12:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:36,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853731569] [2021-01-20 18:12:36,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92230738] [2021-01-20 18:12:36,802 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 [2021-01-20 18:12:36,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-20 18:12:36,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:36,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:12:36,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:36,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:36,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:36,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:12:36,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406192788] [2021-01-20 18:12:36,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:12:36,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:36,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:12:36,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:12:36,933 INFO L87 Difference]: Start difference. First operand 216715 states and 635463 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:39,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:39,054 INFO L93 Difference]: Finished difference Result 220683 states and 647111 transitions. [2021-01-20 18:12:39,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 18:12:39,055 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:12:39,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:39,055 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=539, Invalid=1441, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:12:39,056 INFO L78 Accepts]: Start accepts. Automaton has 220683 states and 647111 transitions. Word has length 81 [2021-01-20 18:12:39,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:39,056 INFO L481 AbstractCegarLoop]: Abstraction has 220683 states and 647111 transitions. [2021-01-20 18:12:39,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:39,056 INFO L276 IsEmpty]: Start isEmpty. Operand 220683 states and 647111 transitions. [2021-01-20 18:12:39,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:12:39,265 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:39,265 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:39,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-20 18:12:39,480 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:39,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:39,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1956131353, now seen corresponding path program 42 times [2021-01-20 18:12:39,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:39,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458982238] [2021-01-20 18:12:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:39,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458982238] [2021-01-20 18:12:39,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693486982] [2021-01-20 18:12:39,726 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 [2021-01-20 18:12:39,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-20 18:12:39,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:39,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:12:39,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:39,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:12:39,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:39,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:39,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:12:39,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807922916] [2021-01-20 18:12:39,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:12:39,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:39,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:12:39,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:12:39,892 INFO L87 Difference]: Start difference. First operand 220683 states and 647111 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:42,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:42,496 INFO L93 Difference]: Finished difference Result 231435 states and 678599 transitions. [2021-01-20 18:12:42,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 18:12:42,497 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:12:42,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:42,498 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=620, Invalid=1636, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 18:12:42,498 INFO L78 Accepts]: Start accepts. Automaton has 231435 states and 678599 transitions. Word has length 81 [2021-01-20 18:12:42,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:42,498 INFO L481 AbstractCegarLoop]: Abstraction has 231435 states and 678599 transitions. [2021-01-20 18:12:42,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:42,499 INFO L276 IsEmpty]: Start isEmpty. Operand 231435 states and 678599 transitions. [2021-01-20 18:12:42,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:12:42,843 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:42,843 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:43,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:43,056 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:43,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1783445575, now seen corresponding path program 43 times [2021-01-20 18:12:43,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:43,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443613205] [2021-01-20 18:12:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:43,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443613205] [2021-01-20 18:12:43,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677458393] [2021-01-20 18:12:43,681 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 [2021-01-20 18:12:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:43,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:12:43,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:43,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:43,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:43,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:12:43,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678680023] [2021-01-20 18:12:43,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:12:43,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:43,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:12:43,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:12:43,804 INFO L87 Difference]: Start difference. First operand 231435 states and 678599 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:46,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:46,254 INFO L93 Difference]: Finished difference Result 235147 states and 689479 transitions. [2021-01-20 18:12:46,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:12:46,255 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:12:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:46,256 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=627, Invalid=1629, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 18:12:46,256 INFO L78 Accepts]: Start accepts. Automaton has 235147 states and 689479 transitions. Word has length 81 [2021-01-20 18:12:46,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:46,257 INFO L481 AbstractCegarLoop]: Abstraction has 235147 states and 689479 transitions. [2021-01-20 18:12:46,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:46,257 INFO L276 IsEmpty]: Start isEmpty. Operand 235147 states and 689479 transitions. [2021-01-20 18:12:46,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:12:46,553 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:46,553 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:46,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-01-20 18:12:46,768 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:46,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:46,769 INFO L82 PathProgramCache]: Analyzing trace with hash -349849833, now seen corresponding path program 44 times [2021-01-20 18:12:46,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:46,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510556830] [2021-01-20 18:12:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:47,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510556830] [2021-01-20 18:12:47,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110616605] [2021-01-20 18:12:47,157 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 [2021-01-20 18:12:47,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:12:47,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:47,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:12:47,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:47,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:12:47,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:47,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:47,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:12:47,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693677503] [2021-01-20 18:12:47,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:12:47,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:47,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:12:47,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:12:47,546 INFO L87 Difference]: Start difference. First operand 235147 states and 689479 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:50,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:50,231 INFO L93 Difference]: Finished difference Result 238475 states and 699207 transitions. [2021-01-20 18:12:50,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 18:12:50,231 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:12:50,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:50,232 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=659, Invalid=1791, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 18:12:50,232 INFO L78 Accepts]: Start accepts. Automaton has 238475 states and 699207 transitions. Word has length 81 [2021-01-20 18:12:50,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:50,240 INFO L481 AbstractCegarLoop]: Abstraction has 238475 states and 699207 transitions. [2021-01-20 18:12:50,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:50,241 INFO L276 IsEmpty]: Start isEmpty. Operand 238475 states and 699207 transitions. [2021-01-20 18:12:50,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:12:50,515 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:50,515 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:50,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:50,728 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:50,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:50,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1540751045, now seen corresponding path program 45 times [2021-01-20 18:12:50,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:50,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537023722] [2021-01-20 18:12:50,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:51,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537023722] [2021-01-20 18:12:51,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778957046] [2021-01-20 18:12:51,026 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 [2021-01-20 18:12:51,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 18:12:51,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:51,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:12:51,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:51,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:51,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:51,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:12:51,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154828802] [2021-01-20 18:12:51,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:12:51,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:51,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:12:51,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:12:51,195 INFO L87 Difference]: Start difference. First operand 238475 states and 699207 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:54,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:54,493 INFO L93 Difference]: Finished difference Result 242059 states and 709703 transitions. [2021-01-20 18:12:54,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 18:12:54,494 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:12:54,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:54,494 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=686, Invalid=1764, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 18:12:54,494 INFO L78 Accepts]: Start accepts. Automaton has 242059 states and 709703 transitions. Word has length 81 [2021-01-20 18:12:54,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:54,495 INFO L481 AbstractCegarLoop]: Abstraction has 242059 states and 709703 transitions. [2021-01-20 18:12:54,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:54,495 INFO L276 IsEmpty]: Start isEmpty. Operand 242059 states and 709703 transitions. [2021-01-20 18:12:54,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:12:54,790 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:12:54,790 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:12:55,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:12:55,003 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:12:55,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:12:55,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1532509803, now seen corresponding path program 46 times [2021-01-20 18:12:55,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:12:55,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202416513] [2021-01-20 18:12:55,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:12:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:12:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:55,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202416513] [2021-01-20 18:12:55,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213651056] [2021-01-20 18:12:55,867 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 [2021-01-20 18:12:55,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:12:55,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:12:55,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-20 18:12:55,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:12:55,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:12:56,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:12:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:12:56,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:12:56,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:12:56,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285936584] [2021-01-20 18:12:56,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:12:56,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:12:56,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:12:56,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:12:56,052 INFO L87 Difference]: Start difference. First operand 242059 states and 709703 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:57,328 WARN L193 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2021-01-20 18:12:59,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:12:59,203 INFO L93 Difference]: Finished difference Result 245259 states and 719047 transitions. [2021-01-20 18:12:59,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-20 18:12:59,204 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:12:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:12:59,205 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=718, Invalid=1934, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 18:12:59,205 INFO L78 Accepts]: Start accepts. Automaton has 245259 states and 719047 transitions. Word has length 81 [2021-01-20 18:12:59,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:12:59,205 INFO L481 AbstractCegarLoop]: Abstraction has 245259 states and 719047 transitions. [2021-01-20 18:12:59,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:12:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 245259 states and 719047 transitions. [2021-01-20 18:13:00,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:13:00,266 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:13:00,266 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:13:00,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-20 18:13:00,479 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:13:00,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:13:00,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1672424131, now seen corresponding path program 47 times [2021-01-20 18:13:00,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:13:00,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862240470] [2021-01-20 18:13:00,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:13:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:01,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862240470] [2021-01-20 18:13:01,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518697343] [2021-01-20 18:13:01,068 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 [2021-01-20 18:13:01,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-20 18:13:01,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:13:01,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:13:01,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:13:01,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:13:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:01,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:13:01,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:13:01,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761366310] [2021-01-20 18:13:01,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:13:01,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:13:01,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:13:01,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:13:01,183 INFO L87 Difference]: Start difference. First operand 245259 states and 719047 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:03,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:13:03,802 INFO L93 Difference]: Finished difference Result 249483 states and 731399 transitions. [2021-01-20 18:13:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 18:13:03,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:13:03,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:13:03,807 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=765, Invalid=1887, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 18:13:03,807 INFO L78 Accepts]: Start accepts. Automaton has 249483 states and 731399 transitions. Word has length 81 [2021-01-20 18:13:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:13:03,807 INFO L481 AbstractCegarLoop]: Abstraction has 249483 states and 731399 transitions. [2021-01-20 18:13:03,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 249483 states and 731399 transitions. [2021-01-20 18:13:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:13:04,245 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:13:04,245 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:13:04,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:04,446 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:13:04,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:13:04,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1702940269, now seen corresponding path program 48 times [2021-01-20 18:13:04,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:13:04,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24703644] [2021-01-20 18:13:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:13:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:04,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24703644] [2021-01-20 18:13:04,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580893828] [2021-01-20 18:13:04,723 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 [2021-01-20 18:13:04,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-20 18:13:04,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:13:04,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:13:04,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:13:04,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:13:04,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:13:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:04,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:13:04,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:13:04,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745074105] [2021-01-20 18:13:04,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:13:04,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:13:04,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:13:04,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:13:04,876 INFO L87 Difference]: Start difference. First operand 249483 states and 731399 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:07,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:13:07,967 INFO L93 Difference]: Finished difference Result 254603 states and 746311 transitions. [2021-01-20 18:13:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 18:13:07,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:13:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:13:07,968 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=797, Invalid=2065, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 18:13:07,968 INFO L78 Accepts]: Start accepts. Automaton has 254603 states and 746311 transitions. Word has length 81 [2021-01-20 18:13:07,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:13:07,969 INFO L481 AbstractCegarLoop]: Abstraction has 254603 states and 746311 transitions. [2021-01-20 18:13:07,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 254603 states and 746311 transitions. [2021-01-20 18:13:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:13:08,213 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:13:08,213 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:13:08,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-20 18:13:08,427 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:13:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:13:08,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1350864351, now seen corresponding path program 49 times [2021-01-20 18:13:08,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:13:08,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908722414] [2021-01-20 18:13:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:13:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:08,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908722414] [2021-01-20 18:13:08,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111894947] [2021-01-20 18:13:08,612 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 [2021-01-20 18:13:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:08,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:13:08,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:13:08,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:13:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:08,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:13:08,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:13:08,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261413031] [2021-01-20 18:13:08,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:13:08,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:13:08,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:13:08,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:13:08,784 INFO L87 Difference]: Start difference. First operand 254603 states and 746311 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:11,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:13:11,796 INFO L93 Difference]: Finished difference Result 257867 states and 755911 transitions. [2021-01-20 18:13:11,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 18:13:11,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:13:11,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:13:11,798 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=864, Invalid=1998, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 18:13:11,798 INFO L78 Accepts]: Start accepts. Automaton has 257867 states and 755911 transitions. Word has length 81 [2021-01-20 18:13:11,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:13:11,798 INFO L481 AbstractCegarLoop]: Abstraction has 257867 states and 755911 transitions. [2021-01-20 18:13:11,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:11,799 INFO L276 IsEmpty]: Start isEmpty. Operand 257867 states and 755911 transitions. [2021-01-20 18:13:12,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:13:12,048 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:13:12,048 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:13:12,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-20 18:13:12,261 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:13:12,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:13:12,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1353837581, now seen corresponding path program 50 times [2021-01-20 18:13:12,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:13:12,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417005036] [2021-01-20 18:13:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:13:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:12,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417005036] [2021-01-20 18:13:12,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124210099] [2021-01-20 18:13:12,532 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 [2021-01-20 18:13:12,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:13:12,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:13:12,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:13:12,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:13:12,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:13:12,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:13:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:12,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:13:12,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:13:12,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802058780] [2021-01-20 18:13:12,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:13:12,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:13:12,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:13:12,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:13:12,676 INFO L87 Difference]: Start difference. First operand 257867 states and 755911 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:14,171 WARN L193 SmtUtils]: Spent 999.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2021-01-20 18:13:16,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:13:16,224 INFO L93 Difference]: Finished difference Result 261579 states and 766663 transitions. [2021-01-20 18:13:16,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-20 18:13:16,225 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-01-20 18:13:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:13:16,226 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=940, Invalid=2366, Unknown=0, NotChecked=0, Total=3306 [2021-01-20 18:13:16,226 INFO L78 Accepts]: Start accepts. Automaton has 261579 states and 766663 transitions. Word has length 81 [2021-01-20 18:13:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:13:16,226 INFO L481 AbstractCegarLoop]: Abstraction has 261579 states and 766663 transitions. [2021-01-20 18:13:16,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:16,226 INFO L276 IsEmpty]: Start isEmpty. Operand 261579 states and 766663 transitions. [2021-01-20 18:13:17,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:13:17,413 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:13:17,413 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:13:17,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-20 18:13:17,614 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:13:17,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:13:17,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1585971837, now seen corresponding path program 51 times [2021-01-20 18:13:17,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:13:17,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046855613] [2021-01-20 18:13:17,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:13:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:18,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046855613] [2021-01-20 18:13:18,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986268835] [2021-01-20 18:13:18,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:18,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-20 18:13:18,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:13:18,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:13:18,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:13:18,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:13:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:18,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:13:18,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:13:18,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88432640] [2021-01-20 18:13:18,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:13:18,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:13:18,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:13:18,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:13:18,325 INFO L87 Difference]: Start difference. First operand 261579 states and 766663 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:20,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:13:20,749 INFO L93 Difference]: Finished difference Result 265611 states and 778631 transitions. [2021-01-20 18:13:20,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-20 18:13:20,760 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:13:20,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:13:20,761 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=583, Invalid=1397, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:13:20,761 INFO L78 Accepts]: Start accepts. Automaton has 265611 states and 778631 transitions. Word has length 86 [2021-01-20 18:13:20,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:13:20,761 INFO L481 AbstractCegarLoop]: Abstraction has 265611 states and 778631 transitions. [2021-01-20 18:13:20,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:20,762 INFO L276 IsEmpty]: Start isEmpty. Operand 265611 states and 778631 transitions. [2021-01-20 18:13:21,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:13:21,028 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:13:21,028 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:13:21,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-20 18:13:21,229 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:13:21,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:13:21,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1357101873, now seen corresponding path program 52 times [2021-01-20 18:13:21,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:13:21,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662092245] [2021-01-20 18:13:21,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:13:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:21,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662092245] [2021-01-20 18:13:21,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478499253] [2021-01-20 18:13:21,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:21,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:13:21,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:13:21,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-20 18:13:21,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:13:21,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:13:21,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:13:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:21,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:13:21,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-20 18:13:21,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638126131] [2021-01-20 18:13:21,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:13:21,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:13:21,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:13:21,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:13:21,667 INFO L87 Difference]: Start difference. First operand 265611 states and 778631 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:13:24,523 INFO L93 Difference]: Finished difference Result 268107 states and 785991 transitions. [2021-01-20 18:13:24,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:13:24,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:13:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:13:24,525 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=692, Invalid=1758, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 18:13:24,525 INFO L78 Accepts]: Start accepts. Automaton has 268107 states and 785991 transitions. Word has length 86 [2021-01-20 18:13:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:13:24,525 INFO L481 AbstractCegarLoop]: Abstraction has 268107 states and 785991 transitions. [2021-01-20 18:13:24,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 268107 states and 785991 transitions. [2021-01-20 18:13:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:13:24,968 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:13:24,968 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:13:25,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:25,182 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:13:25,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:13:25,183 INFO L82 PathProgramCache]: Analyzing trace with hash 139163241, now seen corresponding path program 53 times [2021-01-20 18:13:25,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:13:25,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611621492] [2021-01-20 18:13:25,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:13:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:25,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611621492] [2021-01-20 18:13:25,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943630627] [2021-01-20 18:13:25,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:25,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-20 18:13:25,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:13:25,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:13:25,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:13:25,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:13:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:25,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:13:25,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:13:25,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216065369] [2021-01-20 18:13:25,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:13:25,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:13:25,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:13:25,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:13:25,824 INFO L87 Difference]: Start difference. First operand 268107 states and 785991 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:28,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:13:28,449 INFO L93 Difference]: Finished difference Result 270603 states and 793351 transitions. [2021-01-20 18:13:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 18:13:28,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:13:28,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:13:28,451 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=603, Invalid=1559, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 18:13:28,451 INFO L78 Accepts]: Start accepts. Automaton has 270603 states and 793351 transitions. Word has length 86 [2021-01-20 18:13:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:13:28,451 INFO L481 AbstractCegarLoop]: Abstraction has 270603 states and 793351 transitions. [2021-01-20 18:13:28,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 270603 states and 793351 transitions. [2021-01-20 18:13:28,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:13:28,891 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:13:28,891 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:13:29,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:29,106 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:13:29,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:13:29,107 INFO L82 PathProgramCache]: Analyzing trace with hash -454053575, now seen corresponding path program 54 times [2021-01-20 18:13:29,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:13:29,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147609746] [2021-01-20 18:13:29,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:13:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:29,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147609746] [2021-01-20 18:13:29,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218562699] [2021-01-20 18:13:29,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:29,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-20 18:13:29,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:13:29,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:13:29,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:13:29,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:13:29,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:13:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:29,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:13:29,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-20 18:13:29,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110960607] [2021-01-20 18:13:29,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:13:29,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:13:29,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:13:29,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:13:29,650 INFO L87 Difference]: Start difference. First operand 270603 states and 793351 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:13:32,845 INFO L93 Difference]: Finished difference Result 272715 states and 799559 transitions. [2021-01-20 18:13:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 18:13:32,846 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:13:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:13:32,846 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=720, Invalid=1932, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 18:13:32,847 INFO L78 Accepts]: Start accepts. Automaton has 272715 states and 799559 transitions. Word has length 86 [2021-01-20 18:13:32,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:13:32,847 INFO L481 AbstractCegarLoop]: Abstraction has 272715 states and 799559 transitions. [2021-01-20 18:13:32,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 272715 states and 799559 transitions. [2021-01-20 18:13:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:13:33,214 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:13:33,215 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:13:33,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:33,429 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:13:33,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:13:33,430 INFO L82 PathProgramCache]: Analyzing trace with hash -626739353, now seen corresponding path program 55 times [2021-01-20 18:13:33,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:13:33,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715891391] [2021-01-20 18:13:33,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:13:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:34,819 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-01-20 18:13:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:34,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715891391] [2021-01-20 18:13:34,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140188808] [2021-01-20 18:13:34,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:34,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:13:34,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:13:35,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:13:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:35,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:13:35,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:13:35,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550007422] [2021-01-20 18:13:35,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:13:35,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:13:35,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:13:35,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:13:35,036 INFO L87 Difference]: Start difference. First operand 272715 states and 799559 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:37,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:13:37,319 INFO L93 Difference]: Finished difference Result 274955 states and 806151 transitions. [2021-01-20 18:13:37,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:13:37,320 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:13:37,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:13:37,321 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=643, Invalid=1709, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 18:13:37,321 INFO L78 Accepts]: Start accepts. Automaton has 274955 states and 806151 transitions. Word has length 86 [2021-01-20 18:13:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:13:37,321 INFO L481 AbstractCegarLoop]: Abstraction has 274955 states and 806151 transitions. [2021-01-20 18:13:37,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 274955 states and 806151 transitions. [2021-01-20 18:13:38,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:13:38,522 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:13:38,522 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:13:38,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-01-20 18:13:38,736 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:13:38,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:13:38,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1534932535, now seen corresponding path program 56 times [2021-01-20 18:13:38,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:13:38,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997917468] [2021-01-20 18:13:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:13:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:39,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997917468] [2021-01-20 18:13:39,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549407005] [2021-01-20 18:13:39,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:39,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:13:39,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:13:39,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:13:39,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:13:39,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:13:39,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:13:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:39,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:13:39,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-20 18:13:39,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474786467] [2021-01-20 18:13:39,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:13:39,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:13:39,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:13:39,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:13:39,294 INFO L87 Difference]: Start difference. First operand 274955 states and 806151 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:13:42,471 INFO L93 Difference]: Finished difference Result 276811 states and 811591 transitions. [2021-01-20 18:13:42,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 18:13:42,472 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:13:42,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:13:42,473 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=768, Invalid=2094, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 18:13:42,473 INFO L78 Accepts]: Start accepts. Automaton has 276811 states and 811591 transitions. Word has length 86 [2021-01-20 18:13:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:13:42,473 INFO L481 AbstractCegarLoop]: Abstraction has 276811 states and 811591 transitions. [2021-01-20 18:13:42,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 276811 states and 811591 transitions. [2021-01-20 18:13:42,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:13:42,974 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:13:42,974 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:13:43,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:43,190 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:13:43,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:13:43,191 INFO L82 PathProgramCache]: Analyzing trace with hash -869433883, now seen corresponding path program 57 times [2021-01-20 18:13:43,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:13:43,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009232818] [2021-01-20 18:13:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:13:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:43,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009232818] [2021-01-20 18:13:43,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172317935] [2021-01-20 18:13:43,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:44,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-20 18:13:44,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:13:44,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:13:44,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:13:44,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:13:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:44,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:13:44,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:13:44,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386083786] [2021-01-20 18:13:44,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:13:44,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:13:44,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:13:44,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:13:44,164 INFO L87 Difference]: Start difference. First operand 276811 states and 811591 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:47,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:13:47,328 INFO L93 Difference]: Finished difference Result 278923 states and 817799 transitions. [2021-01-20 18:13:47,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 18:13:47,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:13:47,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:13:47,330 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=703, Invalid=1847, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 18:13:47,330 INFO L78 Accepts]: Start accepts. Automaton has 278923 states and 817799 transitions. Word has length 86 [2021-01-20 18:13:47,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:13:47,330 INFO L481 AbstractCegarLoop]: Abstraction has 278923 states and 817799 transitions. [2021-01-20 18:13:47,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:47,330 INFO L276 IsEmpty]: Start isEmpty. Operand 278923 states and 817799 transitions. [2021-01-20 18:13:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:13:47,686 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:13:47,686 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:13:47,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-01-20 18:13:47,899 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:13:47,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:13:47,900 INFO L82 PathProgramCache]: Analyzing trace with hash 352272565, now seen corresponding path program 58 times [2021-01-20 18:13:47,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:13:47,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665637239] [2021-01-20 18:13:47,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:13:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:48,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665637239] [2021-01-20 18:13:48,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822417574] [2021-01-20 18:13:48,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:48,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:13:48,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:13:48,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-20 18:13:48,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:13:48,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:13:48,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:13:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:49,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:13:49,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-20 18:13:49,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461166660] [2021-01-20 18:13:49,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:13:49,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:13:49,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:13:49,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:13:49,490 INFO L87 Difference]: Start difference. First operand 278923 states and 817799 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:50,276 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2021-01-20 18:13:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:13:53,317 INFO L93 Difference]: Finished difference Result 280779 states and 823239 transitions. [2021-01-20 18:13:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 18:13:53,318 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:13:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:13:53,319 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=836, Invalid=2244, Unknown=0, NotChecked=0, Total=3080 [2021-01-20 18:13:53,319 INFO L78 Accepts]: Start accepts. Automaton has 280779 states and 823239 transitions. Word has length 86 [2021-01-20 18:13:53,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:13:53,320 INFO L481 AbstractCegarLoop]: Abstraction has 280779 states and 823239 transitions. [2021-01-20 18:13:53,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:53,320 INFO L276 IsEmpty]: Start isEmpty. Operand 280779 states and 823239 transitions. [2021-01-20 18:13:53,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:13:53,906 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:13:53,907 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:13:54,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:54,121 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:13:54,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:13:54,122 INFO L82 PathProgramCache]: Analyzing trace with hash -737760797, now seen corresponding path program 59 times [2021-01-20 18:13:54,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:13:54,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63168571] [2021-01-20 18:13:54,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:13:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:54,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63168571] [2021-01-20 18:13:54,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594285335] [2021-01-20 18:13:54,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:54,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-20 18:13:54,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:13:54,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:13:54,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:13:54,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:13:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:54,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:13:54,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:13:54,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755775597] [2021-01-20 18:13:54,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:13:54,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:13:54,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:13:54,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:13:54,434 INFO L87 Difference]: Start difference. First operand 280779 states and 823239 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:58,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:13:58,050 INFO L93 Difference]: Finished difference Result 282635 states and 828679 transitions. [2021-01-20 18:13:58,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 18:13:58,051 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-01-20 18:13:58,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:13:58,052 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=783, Invalid=1973, Unknown=0, NotChecked=0, Total=2756 [2021-01-20 18:13:58,052 INFO L78 Accepts]: Start accepts. Automaton has 282635 states and 828679 transitions. Word has length 86 [2021-01-20 18:13:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:13:58,052 INFO L481 AbstractCegarLoop]: Abstraction has 282635 states and 828679 transitions. [2021-01-20 18:13:58,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:13:58,053 INFO L276 IsEmpty]: Start isEmpty. Operand 282635 states and 828679 transitions. [2021-01-20 18:13:58,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:13:58,428 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:13:58,428 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-20 18:13:58,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-01-20 18:13:58,642 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:13:58,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:13:58,643 INFO L82 PathProgramCache]: Analyzing trace with hash 181842099, now seen corresponding path program 60 times [2021-01-20 18:13:58,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:13:58,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760783520] [2021-01-20 18:13:58,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:13:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:13:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:59,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760783520] [2021-01-20 18:13:59,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547832495] [2021-01-20 18:13:59,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:13:59,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-20 18:13:59,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:13:59,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:13:59,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:13:59,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:13:59,492 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:13:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:13:59,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:13:59,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-20 18:13:59,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636501527] [2021-01-20 18:13:59,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:13:59,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:13:59,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:13:59,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:13:59,504 INFO L87 Difference]: Start difference. First operand 282635 states and 828679 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 18:14:01,565 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2021-01-20 18:14:05,525 WARN L193 SmtUtils]: Spent 3.84 s on a formula simplification. DAG size of input: 17 DAG size of output: 13