/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-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-e5469eb [2021-01-20 18:07:40,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-20 18:07:40,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-20 18:07:40,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-20 18:07:40,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-20 18:07:40,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-20 18:07:40,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-20 18:07:40,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-20 18:07:40,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-20 18:07:40,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-20 18:07:40,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-20 18:07:40,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-20 18:07:40,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-20 18:07:40,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-20 18:07:40,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-20 18:07:40,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-20 18:07:40,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-20 18:07:40,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-20 18:07:40,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-20 18:07:40,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-20 18:07:40,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-20 18:07:40,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-20 18:07:40,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-20 18:07:40,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-20 18:07:40,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-20 18:07:40,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-20 18:07:40,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-20 18:07:40,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-20 18:07:40,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-20 18:07:40,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-20 18:07:40,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-20 18:07:40,752 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-20 18:07:40,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-20 18:07:40,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-20 18:07:40,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-20 18:07:40,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-20 18:07:40,756 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-20 18:07:40,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-20 18:07:40,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-20 18:07:40,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-20 18:07:40,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-20 18:07:40,760 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 18:07:40,808 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-20 18:07:40,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-20 18:07:40,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-20 18:07:40,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-20 18:07:40,813 INFO L138 SettingsManager]: * Use SBE=true [2021-01-20 18:07:40,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-20 18:07:40,813 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-20 18:07:40,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-20 18:07:40,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-20 18:07:40,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-20 18:07:40,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-20 18:07:40,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-20 18:07:40,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-20 18:07:40,816 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-20 18:07:40,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-20 18:07:40,816 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-20 18:07:40,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-20 18:07:40,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-20 18:07:40,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-20 18:07:40,817 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-20 18:07:40,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-20 18:07:40,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 18:07:40,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-20 18:07:40,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-20 18:07:40,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-20 18:07:40,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-20 18:07:40,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-20 18:07:40,819 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-20 18:07:40,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-20 18:07:40,819 INFO L138 SettingsManager]: * Remove dead ends from automaton=false [2021-01-20 18:07:40,820 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-20 18:07:40,820 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-20 18:07:41,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-20 18:07:41,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-20 18:07:41,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-20 18:07:41,293 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-20 18:07:41,294 INFO L275 PluginConnector]: CDTParser initialized [2021-01-20 18:07:41,295 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2021-01-20 18:07:41,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca447954/086bdf6fc9834a99a29c73e328516520/FLAG20a0f5767 [2021-01-20 18:07:42,094 INFO L306 CDTParser]: Found 1 translation units. [2021-01-20 18:07:42,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2021-01-20 18:07:42,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca447954/086bdf6fc9834a99a29c73e328516520/FLAG20a0f5767 [2021-01-20 18:07:42,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca447954/086bdf6fc9834a99a29c73e328516520 [2021-01-20 18:07:42,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-20 18:07:42,323 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-20 18:07:42,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-20 18:07:42,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-20 18:07:42,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-20 18:07:42,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 06:07:42" (1/1) ... [2021-01-20 18:07:42,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@780bc737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:07:42, skipping insertion in model container [2021-01-20 18:07:42,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 06:07:42" (1/1) ... [2021-01-20 18:07:42,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-20 18:07:42,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-20 18:07:42,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 18:07:42,764 INFO L203 MainTranslator]: Completed pre-run [2021-01-20 18:07:42,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 18:07:42,904 INFO L208 MainTranslator]: Completed translation [2021-01-20 18:07:42,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:07:42 WrapperNode [2021-01-20 18:07:42,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-20 18:07:42,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-20 18:07:42,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-20 18:07:42,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-20 18:07:42,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:07:42" (1/1) ... [2021-01-20 18:07:42,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:07:42" (1/1) ... [2021-01-20 18:07:42,956 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-20 18:07:42,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-20 18:07:42,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-20 18:07:42,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-20 18:07:42,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:07:42" (1/1) ... [2021-01-20 18:07:42,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:07:42" (1/1) ... [2021-01-20 18:07:42,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:07:42" (1/1) ... [2021-01-20 18:07:42,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:07:42" (1/1) ... [2021-01-20 18:07:42,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:07:42" (1/1) ... [2021-01-20 18:07:42,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:07:42" (1/1) ... [2021-01-20 18:07:42,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:07:42" (1/1) ... [2021-01-20 18:07:42,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-20 18:07:42,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-20 18:07:42,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-20 18:07:42,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-20 18:07:42,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:07:42" (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 18:07:43,078 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-20 18:07:43,079 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-20 18:07:43,079 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-20 18:07:43,079 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-20 18:07:43,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-20 18:07:43,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-20 18:07:43,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-20 18:07:43,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-20 18:07:43,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-20 18:07:43,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-20 18:07:43,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-20 18:07:43,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-20 18:07:43,082 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 18:07:43,476 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-20 18:07:43,476 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-20 18:07:43,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 06:07:43 BoogieIcfgContainer [2021-01-20 18:07:43,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-20 18:07:43,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-20 18:07:43,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-20 18:07:43,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-20 18:07:43,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 06:07:42" (1/3) ... [2021-01-20 18:07:43,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e82015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 06:07:43, skipping insertion in model container [2021-01-20 18:07:43,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 06:07:42" (2/3) ... [2021-01-20 18:07:43,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e82015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 06:07:43, skipping insertion in model container [2021-01-20 18:07:43,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 06:07:43" (3/3) ... [2021-01-20 18:07:43,489 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2021-01-20 18:07:43,505 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-20 18:07:43,505 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-20 18:07:43,509 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-20 18:07:43,510 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-20 18:07:43,560 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,561 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,561 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,561 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,561 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,562 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,562 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,562 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,562 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,562 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,563 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,563 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,563 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,564 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,564 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,564 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,564 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,564 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,565 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,565 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,565 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,565 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,565 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,566 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,566 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,566 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,566 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,566 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,567 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,567 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,567 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,567 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,568 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,568 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,568 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,568 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,568 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,569 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,569 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,569 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,569 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,570 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,570 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,570 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,570 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,570 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,571 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,571 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,571 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,571 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,571 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,572 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,572 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,572 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,572 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,572 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,575 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,575 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,576 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,576 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,576 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,576 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,583 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,583 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,584 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,584 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,584 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,584 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 18:07:43,587 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-20 18:07:43,600 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-20 18:07:43,624 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-20 18:07:43,624 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-20 18:07:43,624 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-20 18:07:43,624 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-20 18:07:43,624 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-20 18:07:43,625 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-20 18:07:43,625 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-20 18:07:43,625 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-20 18:07:43,636 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 138 flow [2021-01-20 18:07:43,767 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 18:07:43,778 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 18:07:43,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-20 18:07:43,794 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:43,795 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 18:07:43,795 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:43,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:43,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1900887756, now seen corresponding path program 1 times [2021-01-20 18:07:43,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:43,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150687634] [2021-01-20 18:07:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:44,237 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 18:07:44,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150687634] [2021-01-20 18:07:44,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:07:44,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 18:07:44,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111309775] [2021-01-20 18:07:44,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 18:07:44,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:44,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 18:07:44,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 18:07:44,269 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 18:07:44,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:44,519 INFO L93 Difference]: Finished difference Result 3336 states and 9728 transitions. [2021-01-20 18:07:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-20 18:07:44,521 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 18:07:44,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:44,523 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 18:07:44,524 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 9728 transitions. Word has length 28 [2021-01-20 18:07:44,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:44,525 INFO L481 AbstractCegarLoop]: Abstraction has 3336 states and 9728 transitions. [2021-01-20 18:07:44,525 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 18:07:44,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 9728 transitions. [2021-01-20 18:07:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-20 18:07:44,534 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:44,534 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 18:07:44,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-20 18:07:44,535 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:44,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:44,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1199752031, now seen corresponding path program 1 times [2021-01-20 18:07:44,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:44,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142376741] [2021-01-20 18:07:44,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:44,737 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 18:07:44,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142376741] [2021-01-20 18:07:44,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:07:44,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 18:07:44,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353690934] [2021-01-20 18:07:44,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 18:07:44,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:44,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 18:07:44,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 18:07:44,741 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 18:07:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:45,084 INFO L93 Difference]: Finished difference Result 6379 states and 18647 transitions. [2021-01-20 18:07:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-20 18:07:45,085 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 18:07:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:45,087 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:07:45,087 INFO L78 Accepts]: Start accepts. Automaton has 6379 states and 18647 transitions. Word has length 32 [2021-01-20 18:07:45,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:45,088 INFO L481 AbstractCegarLoop]: Abstraction has 6379 states and 18647 transitions. [2021-01-20 18:07:45,088 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 18:07:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 6379 states and 18647 transitions. [2021-01-20 18:07:45,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-20 18:07:45,092 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:45,092 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 18:07:45,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-20 18:07:45,093 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1202725261, now seen corresponding path program 2 times [2021-01-20 18:07:45,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:45,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071905335] [2021-01-20 18:07:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:45,402 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 18:07:45,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071905335] [2021-01-20 18:07:45,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:07:45,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 18:07:45,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704111523] [2021-01-20 18:07:45,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 18:07:45,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:45,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 18:07:45,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-20 18:07:45,407 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 18:07:45,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:45,707 INFO L93 Difference]: Finished difference Result 7067 states and 20591 transitions. [2021-01-20 18:07:45,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-20 18:07:45,708 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 18:07:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:45,711 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:07:45,711 INFO L78 Accepts]: Start accepts. Automaton has 7067 states and 20591 transitions. Word has length 32 [2021-01-20 18:07:45,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:45,712 INFO L481 AbstractCegarLoop]: Abstraction has 7067 states and 20591 transitions. [2021-01-20 18:07:45,712 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 18:07:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 7067 states and 20591 transitions. [2021-01-20 18:07:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-20 18:07:45,722 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:45,722 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 18:07:45,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-20 18:07:45,723 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:45,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:45,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1299742308, now seen corresponding path program 1 times [2021-01-20 18:07:45,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:45,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627265830] [2021-01-20 18:07:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:45,960 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 18:07:45,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627265830] [2021-01-20 18:07:45,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:07:45,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 18:07:45,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648917164] [2021-01-20 18:07:45,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 18:07:45,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:45,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 18:07:45,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-20 18:07:45,966 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 18:07:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:46,311 INFO L93 Difference]: Finished difference Result 9179 states and 26799 transitions. [2021-01-20 18:07:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 18:07:46,312 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 18:07:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:46,313 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:07:46,313 INFO L78 Accepts]: Start accepts. Automaton has 9179 states and 26799 transitions. Word has length 36 [2021-01-20 18:07:46,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:46,313 INFO L481 AbstractCegarLoop]: Abstraction has 9179 states and 26799 transitions. [2021-01-20 18:07:46,314 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 18:07:46,314 INFO L276 IsEmpty]: Start isEmpty. Operand 9179 states and 26799 transitions. [2021-01-20 18:07:46,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-20 18:07:46,378 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:46,379 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 18:07:46,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-20 18:07:46,381 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1296769078, now seen corresponding path program 2 times [2021-01-20 18:07:46,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:46,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186270094] [2021-01-20 18:07:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:46,647 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 18:07:46,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186270094] [2021-01-20 18:07:46,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:07:46,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 18:07:46,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224870835] [2021-01-20 18:07:46,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 18:07:46,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:46,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 18:07:46,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-20 18:07:46,651 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 18:07:47,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:47,029 INFO L93 Difference]: Finished difference Result 9115 states and 26543 transitions. [2021-01-20 18:07:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-20 18:07:47,030 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 18:07:47,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:47,031 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:07:47,031 INFO L78 Accepts]: Start accepts. Automaton has 9115 states and 26543 transitions. Word has length 36 [2021-01-20 18:07:47,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:47,032 INFO L481 AbstractCegarLoop]: Abstraction has 9115 states and 26543 transitions. [2021-01-20 18:07:47,032 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 18:07:47,032 INFO L276 IsEmpty]: Start isEmpty. Operand 9115 states and 26543 transitions. [2021-01-20 18:07:47,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-20 18:07:47,039 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:47,039 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 18:07:47,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-20 18:07:47,040 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:47,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1841087432, now seen corresponding path program 3 times [2021-01-20 18:07:47,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:47,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664933926] [2021-01-20 18:07:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:47,172 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 18:07:47,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664933926] [2021-01-20 18:07:47,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 18:07:47,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 18:07:47,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11098908] [2021-01-20 18:07:47,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 18:07:47,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:47,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 18:07:47,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-20 18:07:47,175 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 18:07:47,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:47,487 INFO L93 Difference]: Finished difference Result 9947 states and 28975 transitions. [2021-01-20 18:07:47,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-20 18:07:47,488 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 18:07:47,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:47,489 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 18:07:47,489 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 28975 transitions. Word has length 36 [2021-01-20 18:07:47,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:47,489 INFO L481 AbstractCegarLoop]: Abstraction has 9947 states and 28975 transitions. [2021-01-20 18:07:47,490 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 18:07:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 28975 transitions. [2021-01-20 18:07:47,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-20 18:07:47,506 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:47,507 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 18:07:47,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-20 18:07:47,507 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:47,508 INFO L82 PathProgramCache]: Analyzing trace with hash -940103400, now seen corresponding path program 1 times [2021-01-20 18:07:47,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:47,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471229352] [2021-01-20 18:07:47,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:47,658 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 18:07:47,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471229352] [2021-01-20 18:07:47,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474899262] [2021-01-20 18:07:47,659 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 18:07:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:47,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 18:07:47,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:47,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:47,904 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:47,920 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 18:07:47,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:47,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-20 18:07:47,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527655389] [2021-01-20 18:07:47,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 18:07:47,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:47,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 18:07:47,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:07:47,923 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 18:07:48,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:48,298 INFO L93 Difference]: Finished difference Result 13083 states and 38191 transitions. [2021-01-20 18:07:48,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 18:07:48,299 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 18:07:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:48,300 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-01-20 18:07:48,300 INFO L78 Accepts]: Start accepts. Automaton has 13083 states and 38191 transitions. Word has length 41 [2021-01-20 18:07:48,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:48,301 INFO L481 AbstractCegarLoop]: Abstraction has 13083 states and 38191 transitions. [2021-01-20 18:07:48,301 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 18:07:48,301 INFO L276 IsEmpty]: Start isEmpty. Operand 13083 states and 38191 transitions. [2021-01-20 18:07:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 18:07:48,333 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:48,333 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 18:07:48,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-20 18:07:48,549 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:48,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:48,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1546743908, now seen corresponding path program 1 times [2021-01-20 18:07:48,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:48,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692420177] [2021-01-20 18:07:48,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:48,801 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 18:07:48,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692420177] [2021-01-20 18:07:48,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150110373] [2021-01-20 18:07:48,802 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 18:07:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:48,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 18:07:48,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:48,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:48,915 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 18:07:48,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:48,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-01-20 18:07:48,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311217817] [2021-01-20 18:07:48,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 18:07:48,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:48,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 18:07:48,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-20 18:07:48,917 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 18:07:49,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:49,201 INFO L93 Difference]: Finished difference Result 16539 states and 48303 transitions. [2021-01-20 18:07:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-20 18:07:49,202 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 18:07:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:49,202 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:07:49,203 INFO L78 Accepts]: Start accepts. Automaton has 16539 states and 48303 transitions. Word has length 46 [2021-01-20 18:07:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:49,203 INFO L481 AbstractCegarLoop]: Abstraction has 16539 states and 48303 transitions. [2021-01-20 18:07:49,203 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 18:07:49,203 INFO L276 IsEmpty]: Start isEmpty. Operand 16539 states and 48303 transitions. [2021-01-20 18:07:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 18:07:49,233 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:49,233 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 18:07:49,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:49,447 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:49,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:49,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1378232494, now seen corresponding path program 2 times [2021-01-20 18:07:49,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:49,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952533424] [2021-01-20 18:07:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:49,574 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 18:07:49,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952533424] [2021-01-20 18:07:49,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216176851] [2021-01-20 18:07:49,575 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 18:07:49,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:07:49,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:49,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 18:07:49,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:49,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:49,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:49,755 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 18:07:49,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:49,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-20 18:07:49,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101933839] [2021-01-20 18:07:49,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-20 18:07:49,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:49,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-20 18:07:49,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-20 18:07:49,757 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 18:07:50,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:50,158 INFO L93 Difference]: Finished difference Result 20379 states and 59503 transitions. [2021-01-20 18:07:50,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 18:07:50,159 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 18:07:50,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:50,160 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 18:07:50,160 INFO L78 Accepts]: Start accepts. Automaton has 20379 states and 59503 transitions. Word has length 46 [2021-01-20 18:07:50,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:50,160 INFO L481 AbstractCegarLoop]: Abstraction has 20379 states and 59503 transitions. [2021-01-20 18:07:50,161 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 18:07:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 20379 states and 59503 transitions. [2021-01-20 18:07:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-20 18:07:50,209 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:50,209 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 18:07:50,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:50,424 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:50,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:50,425 INFO L82 PathProgramCache]: Analyzing trace with hash -443954361, now seen corresponding path program 1 times [2021-01-20 18:07:50,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:50,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474045285] [2021-01-20 18:07:50,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:50,545 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 18:07:50,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474045285] [2021-01-20 18:07:50,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428193012] [2021-01-20 18:07:50,545 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 18:07:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:50,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 18:07:50,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:50,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:50,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:50,698 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 18:07:50,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:50,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-01-20 18:07:50,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486728198] [2021-01-20 18:07:50,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:07:50,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:50,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:07:50,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:07:50,701 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 18:07:50,912 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2021-01-20 18:07:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:51,382 INFO L93 Difference]: Finished difference Result 29851 states and 87279 transitions. [2021-01-20 18:07:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 18:07:51,383 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 18:07:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:51,384 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 18:07:51,384 INFO L78 Accepts]: Start accepts. Automaton has 29851 states and 87279 transitions. Word has length 46 [2021-01-20 18:07:51,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:51,384 INFO L481 AbstractCegarLoop]: Abstraction has 29851 states and 87279 transitions. [2021-01-20 18:07:51,384 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 18:07:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 29851 states and 87279 transitions. [2021-01-20 18:07:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:07:51,421 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:51,421 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 18:07:51,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:51,637 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:51,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:51,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1795867972, now seen corresponding path program 2 times [2021-01-20 18:07:51,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:51,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476209186] [2021-01-20 18:07:51,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:51,764 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 18:07:51,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476209186] [2021-01-20 18:07:51,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982776215] [2021-01-20 18:07:51,765 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 18:07:51,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:07:51,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:51,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 18:07:51,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:51,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:52,007 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 18:07:52,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:52,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-20 18:07:52,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122207538] [2021-01-20 18:07:52,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-20 18:07:52,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:52,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-20 18:07:52,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-20 18:07:52,012 INFO L87 Difference]: Start difference. First operand 29851 states and 87279 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 18:07:52,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:52,469 INFO L93 Difference]: Finished difference Result 33691 states and 98543 transitions. [2021-01-20 18:07:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-20 18:07:52,470 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 18:07:52,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:52,472 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-01-20 18:07:52,473 INFO L78 Accepts]: Start accepts. Automaton has 33691 states and 98543 transitions. Word has length 51 [2021-01-20 18:07:52,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:52,476 INFO L481 AbstractCegarLoop]: Abstraction has 33691 states and 98543 transitions. [2021-01-20 18:07:52,476 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 18:07:52,476 INFO L276 IsEmpty]: Start isEmpty. Operand 33691 states and 98543 transitions. [2021-01-20 18:07:52,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:07:52,516 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:52,516 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 18:07:52,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-20 18:07:52,730 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:52,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:52,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1129108430, now seen corresponding path program 3 times [2021-01-20 18:07:52,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:52,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392424366] [2021-01-20 18:07:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:52,953 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2021-01-20 18:07:53,015 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 18:07:53,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392424366] [2021-01-20 18:07:53,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525327995] [2021-01-20 18:07:53,017 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 18:07:53,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 18:07:53,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:53,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 18:07:53,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:53,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:53,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:53,175 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 18:07:53,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:53,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-01-20 18:07:53,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032768762] [2021-01-20 18:07:53,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:07:53,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:53,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:07:53,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:07:53,177 INFO L87 Difference]: Start difference. First operand 33691 states and 98543 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 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 18:07:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:53,819 INFO L93 Difference]: Finished difference Result 37531 states and 109743 transitions. [2021-01-20 18:07:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 18:07:53,820 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 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 18:07:53,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:53,820 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2021-01-20 18:07:53,821 INFO L78 Accepts]: Start accepts. Automaton has 37531 states and 109743 transitions. Word has length 51 [2021-01-20 18:07:53,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:53,821 INFO L481 AbstractCegarLoop]: Abstraction has 37531 states and 109743 transitions. [2021-01-20 18:07:53,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 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 18:07:53,821 INFO L276 IsEmpty]: Start isEmpty. Operand 37531 states and 109743 transitions. [2021-01-20 18:07:53,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-20 18:07:53,841 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:53,842 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 18:07:54,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:54,057 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:54,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:54,058 INFO L82 PathProgramCache]: Analyzing trace with hash -194830297, now seen corresponding path program 4 times [2021-01-20 18:07:54,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:54,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751044440] [2021-01-20 18:07:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:54,187 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 18:07:54,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751044440] [2021-01-20 18:07:54,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685180259] [2021-01-20 18:07:54,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:07:54,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:07:54,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:54,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:07:54,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:54,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:54,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:54,309 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 18:07:54,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:54,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-20 18:07:54,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481309314] [2021-01-20 18:07:54,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:07:54,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:54,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:07:54,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:07:54,312 INFO L87 Difference]: Start difference. First operand 37531 states and 109743 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 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 18:07:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:54,981 INFO L93 Difference]: Finished difference Result 39579 states and 115759 transitions. [2021-01-20 18:07:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 18:07:54,982 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 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 18:07:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:54,983 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-01-20 18:07:54,983 INFO L78 Accepts]: Start accepts. Automaton has 39579 states and 115759 transitions. Word has length 51 [2021-01-20 18:07:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:54,983 INFO L481 AbstractCegarLoop]: Abstraction has 39579 states and 115759 transitions. [2021-01-20 18:07:54,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 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 18:07:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 39579 states and 115759 transitions. [2021-01-20 18:07:55,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:07:55,022 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:55,023 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 18:07:55,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:07:55,224 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:55,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:55,225 INFO L82 PathProgramCache]: Analyzing trace with hash -688928278, now seen corresponding path program 5 times [2021-01-20 18:07:55,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:55,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220933140] [2021-01-20 18:07:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:55,391 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 18:07:55,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220933140] [2021-01-20 18:07:55,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166741689] [2021-01-20 18:07:55,391 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 18:07:55,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 18:07:55,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:55,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:07:55,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:55,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:55,669 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 18:07:55,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:55,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-20 18:07:55,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509573394] [2021-01-20 18:07:55,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:07:55,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:55,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:07:55,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:07:55,671 INFO L87 Difference]: Start difference. First operand 39579 states and 115759 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 18:07:56,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:56,247 INFO L93 Difference]: Finished difference Result 44059 states and 128943 transitions. [2021-01-20 18:07:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 18:07:56,362 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 18:07:56,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:56,366 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 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 18:07:56,366 INFO L78 Accepts]: Start accepts. Automaton has 44059 states and 128943 transitions. Word has length 56 [2021-01-20 18:07:56,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:56,367 INFO L481 AbstractCegarLoop]: Abstraction has 44059 states and 128943 transitions. [2021-01-20 18:07:56,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 18:07:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 44059 states and 128943 transitions. [2021-01-20 18:07:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:07:56,407 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:56,407 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 18:07:56,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-20 18:07:56,622 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:56,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:56,624 INFO L82 PathProgramCache]: Analyzing trace with hash -222787652, now seen corresponding path program 6 times [2021-01-20 18:07:56,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:56,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668723734] [2021-01-20 18:07:56,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:56,781 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 18:07:56,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668723734] [2021-01-20 18:07:56,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968071578] [2021-01-20 18:07:56,782 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 18:07:56,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 18:07:56,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:56,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:07:56,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:56,890 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:56,906 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:56,915 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 18:07:56,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:56,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-20 18:07:56,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022735557] [2021-01-20 18:07:56,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:07:56,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:56,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:07:56,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:07:56,917 INFO L87 Difference]: Start difference. First operand 44059 states and 128943 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 18:07:57,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:57,688 INFO L93 Difference]: Finished difference Result 48027 states and 140591 transitions. [2021-01-20 18:07:57,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 18:07:57,689 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 18:07:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:57,690 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 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 18:07:57,690 INFO L78 Accepts]: Start accepts. Automaton has 48027 states and 140591 transitions. Word has length 56 [2021-01-20 18:07:57,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:57,690 INFO L481 AbstractCegarLoop]: Abstraction has 48027 states and 140591 transitions. [2021-01-20 18:07:57,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 18:07:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 48027 states and 140591 transitions. [2021-01-20 18:07:57,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:07:57,727 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:57,727 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 18:07:57,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-20 18:07:57,928 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:57,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:57,929 INFO L82 PathProgramCache]: Analyzing trace with hash -467361066, now seen corresponding path program 7 times [2021-01-20 18:07:57,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:57,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556869174] [2021-01-20 18:07:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:58,100 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 18:07:58,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556869174] [2021-01-20 18:07:58,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25821972] [2021-01-20 18:07:58,101 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 18:07:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:58,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:07:58,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:58,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:58,329 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 18:07:58,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:58,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-20 18:07:58,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722212262] [2021-01-20 18:07:58,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:07:58,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:58,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:07:58,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:07:58,335 INFO L87 Difference]: Start difference. First operand 48027 states and 140591 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 18:07:59,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:07:59,277 INFO L93 Difference]: Finished difference Result 58523 states and 171311 transitions. [2021-01-20 18:07:59,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 18:07:59,278 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 18:07:59,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:07:59,279 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2021-01-20 18:07:59,279 INFO L78 Accepts]: Start accepts. Automaton has 58523 states and 171311 transitions. Word has length 56 [2021-01-20 18:07:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:07:59,279 INFO L481 AbstractCegarLoop]: Abstraction has 58523 states and 171311 transitions. [2021-01-20 18:07:59,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 18:07:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 58523 states and 171311 transitions. [2021-01-20 18:07:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:07:59,326 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:07:59,326 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 18:07:59,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-20 18:07:59,535 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:07:59,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:07:59,535 INFO L82 PathProgramCache]: Analyzing trace with hash 452241830, now seen corresponding path program 8 times [2021-01-20 18:07:59,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:07:59,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425918606] [2021-01-20 18:07:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:07:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:07:59,693 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 18:07:59,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425918606] [2021-01-20 18:07:59,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356521843] [2021-01-20 18:07:59,693 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 18:07:59,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:07:59,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:07:59,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:07:59,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:07:59,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:07:59,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:07:59,836 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 18:07:59,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:07:59,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-20 18:07:59,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891371842] [2021-01-20 18:07:59,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:07:59,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:07:59,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:07:59,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:07:59,839 INFO L87 Difference]: Start difference. First operand 58523 states and 171311 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 18:08:00,351 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2021-01-20 18:08:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:00,848 INFO L93 Difference]: Finished difference Result 63259 states and 185135 transitions. [2021-01-20 18:08:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 18:08:00,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 18:08:00,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:00,850 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 18:08:00,850 INFO L78 Accepts]: Start accepts. Automaton has 63259 states and 185135 transitions. Word has length 56 [2021-01-20 18:08:00,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:00,850 INFO L481 AbstractCegarLoop]: Abstraction has 63259 states and 185135 transitions. [2021-01-20 18:08:00,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 18:08:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand 63259 states and 185135 transitions. [2021-01-20 18:08:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:08:01,048 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:01,048 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 18:08:01,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-20 18:08:01,262 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:01,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:01,263 INFO L82 PathProgramCache]: Analyzing trace with hash 804317748, now seen corresponding path program 9 times [2021-01-20 18:08:01,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:01,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778007042] [2021-01-20 18:08:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:01,396 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 18:08:01,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778007042] [2021-01-20 18:08:01,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630159993] [2021-01-20 18:08:01,397 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 18:08:01,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 18:08:01,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:01,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 18:08:01,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:01,487 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:01,493 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 18:08:01,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:01,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-20 18:08:01,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351105691] [2021-01-20 18:08:01,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-20 18:08:01,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:01,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-20 18:08:01,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-01-20 18:08:01,495 INFO L87 Difference]: Start difference. First operand 63259 states and 185135 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 18:08:02,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:02,325 INFO L93 Difference]: Finished difference Result 68123 states and 199407 transitions. [2021-01-20 18:08:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 18:08:02,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 18:08:02,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:02,327 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-01-20 18:08:02,327 INFO L78 Accepts]: Start accepts. Automaton has 68123 states and 199407 transitions. Word has length 56 [2021-01-20 18:08:02,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:02,327 INFO L481 AbstractCegarLoop]: Abstraction has 68123 states and 199407 transitions. [2021-01-20 18:08:02,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 18:08:02,327 INFO L276 IsEmpty]: Start isEmpty. Operand 68123 states and 199407 transitions. [2021-01-20 18:08:02,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-20 18:08:02,362 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:02,362 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 18:08:02,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-20 18:08:02,576 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:02,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:02,577 INFO L82 PathProgramCache]: Analyzing trace with hash 801344518, now seen corresponding path program 10 times [2021-01-20 18:08:02,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:02,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756916142] [2021-01-20 18:08:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:02,727 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 18:08:02,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756916142] [2021-01-20 18:08:02,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048326857] [2021-01-20 18:08:02,728 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 18:08:02,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:08:02,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:02,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:08:02,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:03,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:03,063 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:03,075 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 18:08:03,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:03,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-01-20 18:08:03,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586098424] [2021-01-20 18:08:03,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:08:03,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:03,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:08:03,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:08:03,079 INFO L87 Difference]: Start difference. First operand 68123 states and 199407 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 18:08:04,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:04,198 INFO L93 Difference]: Finished difference Result 69467 states and 203247 transitions. [2021-01-20 18:08:04,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:08:04,198 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 18:08:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:04,199 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:08:04,199 INFO L78 Accepts]: Start accepts. Automaton has 69467 states and 203247 transitions. Word has length 56 [2021-01-20 18:08:04,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:04,200 INFO L481 AbstractCegarLoop]: Abstraction has 69467 states and 203247 transitions. [2021-01-20 18:08:04,200 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 18:08:04,200 INFO L276 IsEmpty]: Start isEmpty. Operand 69467 states and 203247 transitions. [2021-01-20 18:08:04,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:08:04,267 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:04,267 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 18:08:04,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:04,468 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:04,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:04,469 INFO L82 PathProgramCache]: Analyzing trace with hash 548080699, now seen corresponding path program 11 times [2021-01-20 18:08:04,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:04,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287753716] [2021-01-20 18:08:04,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:04,877 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 18:08:04,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287753716] [2021-01-20 18:08:04,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243973148] [2021-01-20 18:08:04,877 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 18:08:04,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 18:08:04,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:04,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:08:04,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:04,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:04,978 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 18:08:04,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:04,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-01-20 18:08:04,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138247841] [2021-01-20 18:08:04,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:08:04,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:04,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:08:04,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:08:04,980 INFO L87 Difference]: Start difference. First operand 69467 states and 203247 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 18:08:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:05,543 INFO L93 Difference]: Finished difference Result 73179 states and 214127 transitions. [2021-01-20 18:08:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-20 18:08:05,544 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 18:08:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:05,544 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2021-01-20 18:08:05,545 INFO L78 Accepts]: Start accepts. Automaton has 73179 states and 214127 transitions. Word has length 61 [2021-01-20 18:08:05,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:05,545 INFO L481 AbstractCegarLoop]: Abstraction has 73179 states and 214127 transitions. [2021-01-20 18:08:05,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 18:08:05,545 INFO L276 IsEmpty]: Start isEmpty. Operand 73179 states and 214127 transitions. [2021-01-20 18:08:05,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:08:05,873 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:05,873 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 18:08:06,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:06,075 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:06,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:06,076 INFO L82 PathProgramCache]: Analyzing trace with hash 503720845, now seen corresponding path program 12 times [2021-01-20 18:08:06,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:06,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815021356] [2021-01-20 18:08:06,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:06,254 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 18:08:06,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815021356] [2021-01-20 18:08:06,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361827805] [2021-01-20 18:08:06,255 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 18:08:06,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 18:08:06,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:06,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:08:06,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:06,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:06,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:06,382 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 18:08:06,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:06,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 18:08:06,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889608778] [2021-01-20 18:08:06,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:08:06,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:06,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:08:06,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:08:06,384 INFO L87 Difference]: Start difference. First operand 73179 states and 214127 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 18:08:07,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:07,321 INFO L93 Difference]: Finished difference Result 76635 states and 224239 transitions. [2021-01-20 18:08:07,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 18:08:07,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 18:08:07,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:07,322 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2021-01-20 18:08:07,323 INFO L78 Accepts]: Start accepts. Automaton has 76635 states and 224239 transitions. Word has length 61 [2021-01-20 18:08:07,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:07,323 INFO L481 AbstractCegarLoop]: Abstraction has 76635 states and 224239 transitions. [2021-01-20 18:08:07,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 18:08:07,323 INFO L276 IsEmpty]: Start isEmpty. Operand 76635 states and 224239 transitions. [2021-01-20 18:08:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:08:07,661 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:07,661 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 18:08:07,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-20 18:08:07,862 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:07,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1988537895, now seen corresponding path program 13 times [2021-01-20 18:08:07,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:07,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645562284] [2021-01-20 18:08:07,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:08,004 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 18:08:08,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645562284] [2021-01-20 18:08:08,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550341894] [2021-01-20 18:08:08,004 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 18:08:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:08,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:08:08,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:08,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:08,120 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 18:08:08,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:08,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-01-20 18:08:08,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923230395] [2021-01-20 18:08:08,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:08:08,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:08,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:08:08,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:08:08,122 INFO L87 Difference]: Start difference. First operand 76635 states and 224239 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 18:08:09,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:09,091 INFO L93 Difference]: Finished difference Result 80219 states and 234735 transitions. [2021-01-20 18:08:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-20 18:08:09,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 18:08:09,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:09,092 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2021-01-20 18:08:09,092 INFO L78 Accepts]: Start accepts. Automaton has 80219 states and 234735 transitions. Word has length 61 [2021-01-20 18:08:09,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:09,092 INFO L481 AbstractCegarLoop]: Abstraction has 80219 states and 234735 transitions. [2021-01-20 18:08:09,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 18:08:09,093 INFO L276 IsEmpty]: Start isEmpty. Operand 80219 states and 234735 transitions. [2021-01-20 18:08:09,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:08:09,162 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:09,162 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 18:08:09,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:09,369 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:09,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:09,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1084722953, now seen corresponding path program 14 times [2021-01-20 18:08:09,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:09,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271041502] [2021-01-20 18:08:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:09,549 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 18:08:09,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271041502] [2021-01-20 18:08:09,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676855136] [2021-01-20 18:08:09,550 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 18:08:09,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:08:09,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:09,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:08:09,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:09,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:09,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:09,701 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 18:08:09,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:09,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 18:08:09,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24432039] [2021-01-20 18:08:09,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:08:09,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:09,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:08:09,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:08:09,705 INFO L87 Difference]: Start difference. First operand 80219 states and 234735 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 18:08:10,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:10,936 INFO L93 Difference]: Finished difference Result 91147 states and 266695 transitions. [2021-01-20 18:08:10,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 18:08:10,944 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 18:08:10,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:10,945 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2021-01-20 18:08:10,946 INFO L78 Accepts]: Start accepts. Automaton has 91147 states and 266695 transitions. Word has length 61 [2021-01-20 18:08:10,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:10,946 INFO L481 AbstractCegarLoop]: Abstraction has 91147 states and 266695 transitions. [2021-01-20 18:08:10,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 18:08:10,950 INFO L276 IsEmpty]: Start isEmpty. Operand 91147 states and 266695 transitions. [2021-01-20 18:08:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:08:11,064 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:11,064 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 18:08:11,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-20 18:08:11,266 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:11,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:11,267 INFO L82 PathProgramCache]: Analyzing trace with hash 2120210981, now seen corresponding path program 15 times [2021-01-20 18:08:11,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:11,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022400469] [2021-01-20 18:08:11,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:11,422 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 18:08:11,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022400469] [2021-01-20 18:08:11,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496399080] [2021-01-20 18:08:11,426 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 18:08:11,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 18:08:11,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:11,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:08:11,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:11,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:11,534 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 18:08:11,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:11,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-01-20 18:08:11,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066047773] [2021-01-20 18:08:11,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:08:11,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:11,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:08:11,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:08:11,536 INFO L87 Difference]: Start difference. First operand 91147 states and 266695 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 18:08:12,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:12,373 INFO L93 Difference]: Finished difference Result 95371 states and 279047 transitions. [2021-01-20 18:08:12,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:08:12,373 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 18:08:12,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:12,374 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-01-20 18:08:12,374 INFO L78 Accepts]: Start accepts. Automaton has 95371 states and 279047 transitions. Word has length 61 [2021-01-20 18:08:12,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:12,374 INFO L481 AbstractCegarLoop]: Abstraction has 95371 states and 279047 transitions. [2021-01-20 18:08:12,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 18:08:12,374 INFO L276 IsEmpty]: Start isEmpty. Operand 95371 states and 279047 transitions. [2021-01-20 18:08:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:08:12,804 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:12,804 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 18:08:13,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-20 18:08:13,018 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:13,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:13,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1255153419, now seen corresponding path program 16 times [2021-01-20 18:08:13,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:13,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247788100] [2021-01-20 18:08:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:13,161 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 18:08:13,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247788100] [2021-01-20 18:08:13,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622163081] [2021-01-20 18:08:13,162 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 18:08:13,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:08:13,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:13,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:08:13,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:13,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:13,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:13,291 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 18:08:13,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:13,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-20 18:08:13,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997940893] [2021-01-20 18:08:13,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:08:13,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:13,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:08:13,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:08:13,294 INFO L87 Difference]: Start difference. First operand 95371 states and 279047 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 18:08:14,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:14,327 INFO L93 Difference]: Finished difference Result 100491 states and 293959 transitions. [2021-01-20 18:08:14,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 18:08:14,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 18:08:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:14,329 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 18:08:14,329 INFO L78 Accepts]: Start accepts. Automaton has 100491 states and 293959 transitions. Word has length 61 [2021-01-20 18:08:14,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:14,329 INFO L481 AbstractCegarLoop]: Abstraction has 100491 states and 293959 transitions. [2021-01-20 18:08:14,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 18:08:14,329 INFO L276 IsEmpty]: Start isEmpty. Operand 100491 states and 293959 transitions. [2021-01-20 18:08:14,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:08:14,735 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:14,735 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 18:08:14,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-20 18:08:14,949 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:14,950 INFO L82 PathProgramCache]: Analyzing trace with hash -903077501, now seen corresponding path program 17 times [2021-01-20 18:08:14,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:14,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840749891] [2021-01-20 18:08:14,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:15,084 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 18:08:15,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840749891] [2021-01-20 18:08:15,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157590934] [2021-01-20 18:08:15,084 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 18:08:15,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 18:08:15,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:15,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:08:15,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:15,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:15,194 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 18:08:15,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:15,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-01-20 18:08:15,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979981714] [2021-01-20 18:08:15,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-20 18:08:15,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:15,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-20 18:08:15,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-01-20 18:08:15,198 INFO L87 Difference]: Start difference. First operand 100491 states and 293959 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 18:08:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:16,534 INFO L93 Difference]: Finished difference Result 103755 states and 303559 transitions. [2021-01-20 18:08:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:08:16,535 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 18:08:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:16,536 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=926, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 18:08:16,536 INFO L78 Accepts]: Start accepts. Automaton has 103755 states and 303559 transitions. Word has length 61 [2021-01-20 18:08:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:16,536 INFO L481 AbstractCegarLoop]: Abstraction has 103755 states and 303559 transitions. [2021-01-20 18:08:16,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 18:08:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 103755 states and 303559 transitions. [2021-01-20 18:08:16,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-20 18:08:16,636 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:16,636 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 18:08:16,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-20 18:08:16,837 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:16,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:16,838 INFO L82 PathProgramCache]: Analyzing trace with hash -906050731, now seen corresponding path program 18 times [2021-01-20 18:08:16,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:16,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133738121] [2021-01-20 18:08:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:17,020 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 18:08:17,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133738121] [2021-01-20 18:08:17,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654927278] [2021-01-20 18:08:17,020 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 18:08:17,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 18:08:17,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:17,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 18:08:17,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:17,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:17,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:17,178 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 18:08:17,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:17,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-20 18:08:17,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407177332] [2021-01-20 18:08:17,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:08:17,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:17,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:08:17,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:08:17,181 INFO L87 Difference]: Start difference. First operand 103755 states and 303559 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 18:08:18,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:18,553 INFO L93 Difference]: Finished difference Result 107467 states and 314311 transitions. [2021-01-20 18:08:18,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 18:08:18,554 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 18:08:18,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:18,555 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=490, Invalid=1232, Unknown=0, NotChecked=0, Total=1722 [2021-01-20 18:08:18,555 INFO L78 Accepts]: Start accepts. Automaton has 107467 states and 314311 transitions. Word has length 61 [2021-01-20 18:08:18,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:18,555 INFO L481 AbstractCegarLoop]: Abstraction has 107467 states and 314311 transitions. [2021-01-20 18:08:18,555 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 18:08:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand 107467 states and 314311 transitions. [2021-01-20 18:08:19,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:08:19,051 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:19,051 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 18:08:19,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-20 18:08:19,262 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:19,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:19,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1591649445, now seen corresponding path program 19 times [2021-01-20 18:08:19,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:19,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426286331] [2021-01-20 18:08:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:19,433 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 18:08:19,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426286331] [2021-01-20 18:08:19,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8222732] [2021-01-20 18:08:19,434 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 18:08:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:19,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:08:19,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:19,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:19,558 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 18:08:19,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:19,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-20 18:08:19,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846768210] [2021-01-20 18:08:19,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:08:19,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:19,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:08:19,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:08:19,560 INFO L87 Difference]: Start difference. First operand 107467 states and 314311 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 18:08:20,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:20,340 INFO L93 Difference]: Finished difference Result 110475 states and 323207 transitions. [2021-01-20 18:08:20,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 18:08:20,340 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 18:08:20,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:20,341 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=288, Invalid=704, Unknown=0, NotChecked=0, Total=992 [2021-01-20 18:08:20,341 INFO L78 Accepts]: Start accepts. Automaton has 110475 states and 323207 transitions. Word has length 66 [2021-01-20 18:08:20,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:20,342 INFO L481 AbstractCegarLoop]: Abstraction has 110475 states and 323207 transitions. [2021-01-20 18:08:20,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 18:08:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 110475 states and 323207 transitions. [2021-01-20 18:08:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:08:20,427 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:20,427 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 18:08:20,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:20,628 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:20,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:20,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1636009299, now seen corresponding path program 20 times [2021-01-20 18:08:20,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:20,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130155557] [2021-01-20 18:08:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:21,256 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2021-01-20 18:08:21,276 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 18:08:21,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130155557] [2021-01-20 18:08:21,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032717317] [2021-01-20 18:08:21,276 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 18:08:21,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:08:21,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:21,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:08:21,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:21,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:21,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:21,406 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 18:08:21,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:21,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 18:08:21,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797512611] [2021-01-20 18:08:21,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:08:21,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:21,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:08:21,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:08:21,411 INFO L87 Difference]: Start difference. First operand 110475 states and 323207 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 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 18:08:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:22,399 INFO L93 Difference]: Finished difference Result 112459 states and 329031 transitions. [2021-01-20 18:08:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:08:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 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 18:08:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:22,401 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=373, Invalid=959, Unknown=0, NotChecked=0, Total=1332 [2021-01-20 18:08:22,401 INFO L78 Accepts]: Start accepts. Automaton has 112459 states and 329031 transitions. Word has length 66 [2021-01-20 18:08:22,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:22,401 INFO L481 AbstractCegarLoop]: Abstraction has 112459 states and 329031 transitions. [2021-01-20 18:08:22,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 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 18:08:22,402 INFO L276 IsEmpty]: Start isEmpty. Operand 112459 states and 329031 transitions. [2021-01-20 18:08:22,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:08:22,492 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:22,492 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 18:08:22,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-20 18:08:22,693 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:22,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:22,694 INFO L82 PathProgramCache]: Analyzing trace with hash -151192249, now seen corresponding path program 21 times [2021-01-20 18:08:22,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:22,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469435139] [2021-01-20 18:08:22,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:22,852 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 18:08:22,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469435139] [2021-01-20 18:08:22,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064253915] [2021-01-20 18:08:22,852 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 18:08:23,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 18:08:23,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:23,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:08:23,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:23,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:23,316 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 18:08:23,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:23,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-20 18:08:23,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513002371] [2021-01-20 18:08:23,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:08:23,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:23,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:08:23,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:08:23,319 INFO L87 Difference]: Start difference. First operand 112459 states and 329031 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 18:08:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:24,181 INFO L93 Difference]: Finished difference Result 114571 states and 335239 transitions. [2021-01-20 18:08:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 18:08:24,181 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 18:08:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:24,182 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=313, Invalid=809, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 18:08:24,182 INFO L78 Accepts]: Start accepts. Automaton has 114571 states and 335239 transitions. Word has length 66 [2021-01-20 18:08:24,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:24,183 INFO L481 AbstractCegarLoop]: Abstraction has 114571 states and 335239 transitions. [2021-01-20 18:08:24,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 18:08:24,183 INFO L276 IsEmpty]: Start isEmpty. Operand 114571 states and 335239 transitions. [2021-01-20 18:08:24,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:08:24,268 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:24,268 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 18:08:24,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:24,469 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:24,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:24,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1070514199, now seen corresponding path program 22 times [2021-01-20 18:08:24,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:24,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391627978] [2021-01-20 18:08:24,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:24,648 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 18:08:24,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391627978] [2021-01-20 18:08:24,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983767450] [2021-01-20 18:08:24,649 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 18:08:24,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:08:24,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:24,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:08:24,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:24,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:24,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:24,768 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 18:08:24,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:24,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 18:08:24,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355224452] [2021-01-20 18:08:24,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:08:24,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:24,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:08:24,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:08:24,769 INFO L87 Difference]: Start difference. First operand 114571 states and 335239 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 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 18:08:25,288 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2021-01-20 18:08:26,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:26,392 INFO L93 Difference]: Finished difference Result 116427 states and 340679 transitions. [2021-01-20 18:08:26,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:08:26,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 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 18:08:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:26,394 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=1076, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 18:08:26,394 INFO L78 Accepts]: Start accepts. Automaton has 116427 states and 340679 transitions. Word has length 66 [2021-01-20 18:08:26,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:26,394 INFO L481 AbstractCegarLoop]: Abstraction has 116427 states and 340679 transitions. [2021-01-20 18:08:26,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 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 18:08:26,395 INFO L276 IsEmpty]: Start isEmpty. Operand 116427 states and 340679 transitions. [2021-01-20 18:08:26,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:08:26,499 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:26,499 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 18:08:26,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-20 18:08:26,705 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:26,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:26,706 INFO L82 PathProgramCache]: Analyzing trace with hash -19519163, now seen corresponding path program 23 times [2021-01-20 18:08:26,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:26,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025530232] [2021-01-20 18:08:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:26,863 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 18:08:26,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025530232] [2021-01-20 18:08:26,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821116600] [2021-01-20 18:08:26,864 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 18:08:26,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 18:08:26,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:26,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:08:26,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:26,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:26,991 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 18:08:26,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:26,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-20 18:08:26,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263923358] [2021-01-20 18:08:26,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:08:26,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:26,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:08:26,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:08:26,993 INFO L87 Difference]: Start difference. First operand 116427 states and 340679 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 18:08:28,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:28,346 INFO L93 Difference]: Finished difference Result 118283 states and 346119 transitions. [2021-01-20 18:08:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:08:28,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 18:08:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:28,347 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 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 18:08:28,347 INFO L78 Accepts]: Start accepts. Automaton has 118283 states and 346119 transitions. Word has length 66 [2021-01-20 18:08:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:28,348 INFO L481 AbstractCegarLoop]: Abstraction has 118283 states and 346119 transitions. [2021-01-20 18:08:28,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 18:08:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 118283 states and 346119 transitions. [2021-01-20 18:08:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:08:28,440 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:28,440 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 18:08:28,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:28,647 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:28,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:28,647 INFO L82 PathProgramCache]: Analyzing trace with hash 900083733, now seen corresponding path program 24 times [2021-01-20 18:08:28,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:28,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407847149] [2021-01-20 18:08:28,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:28,808 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 18:08:28,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407847149] [2021-01-20 18:08:28,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662711886] [2021-01-20 18:08:28,808 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 18:08:28,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 18:08:28,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:28,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:08:28,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:28,906 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:28,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:28,929 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 18:08:28,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:28,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-20 18:08:28,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223689364] [2021-01-20 18:08:28,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:08:28,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:28,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:08:28,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:08:28,930 INFO L87 Difference]: Start difference. First operand 118283 states and 346119 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 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 18:08:30,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:30,639 INFO L93 Difference]: Finished difference Result 121163 states and 354503 transitions. [2021-01-20 18:08:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:08:30,639 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 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 18:08:30,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:30,641 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 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 18:08:30,641 INFO L78 Accepts]: Start accepts. Automaton has 121163 states and 354503 transitions. Word has length 66 [2021-01-20 18:08:30,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:30,642 INFO L481 AbstractCegarLoop]: Abstraction has 121163 states and 354503 transitions. [2021-01-20 18:08:30,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 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 18:08:30,650 INFO L276 IsEmpty]: Start isEmpty. Operand 121163 states and 354503 transitions. [2021-01-20 18:08:30,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:08:30,782 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:30,782 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 18:08:30,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-20 18:08:30,996 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:30,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1252159651, now seen corresponding path program 25 times [2021-01-20 18:08:30,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:30,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178703953] [2021-01-20 18:08:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:31,141 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 18:08:31,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178703953] [2021-01-20 18:08:31,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765304548] [2021-01-20 18:08:31,141 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 18:08:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:31,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:08:31,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:31,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:31,244 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 18:08:31,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:31,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-20 18:08:31,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676092484] [2021-01-20 18:08:31,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 18:08:31,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:31,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 18:08:31,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-20 18:08:31,247 INFO L87 Difference]: Start difference. First operand 121163 states and 354503 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 18:08:32,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:32,705 INFO L93 Difference]: Finished difference Result 124427 states and 364103 transitions. [2021-01-20 18:08:32,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:08:32,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 18:08:32,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:32,707 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=423, Invalid=983, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:08:32,707 INFO L78 Accepts]: Start accepts. Automaton has 124427 states and 364103 transitions. Word has length 66 [2021-01-20 18:08:32,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:32,708 INFO L481 AbstractCegarLoop]: Abstraction has 124427 states and 364103 transitions. [2021-01-20 18:08:32,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 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 18:08:32,708 INFO L276 IsEmpty]: Start isEmpty. Operand 124427 states and 364103 transitions. [2021-01-20 18:08:32,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-20 18:08:32,792 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:32,792 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 18:08:32,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:32,993 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:32,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:32,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1249186421, now seen corresponding path program 26 times [2021-01-20 18:08:32,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:32,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050266044] [2021-01-20 18:08:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 18:08:33,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050266044] [2021-01-20 18:08:33,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975342097] [2021-01-20 18:08:33,151 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 18:08:33,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:08:33,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:33,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 18:08:33,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:33,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:33,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:33,290 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 18:08:33,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:33,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-20 18:08:33,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557013872] [2021-01-20 18:08:33,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:08:33,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:33,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:08:33,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:08:33,291 INFO L87 Difference]: Start difference. First operand 124427 states and 364103 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 18:08:35,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:35,133 INFO L93 Difference]: Finished difference Result 125771 states and 367943 transitions. [2021-01-20 18:08:35,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:08:35,134 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 18:08:35,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:35,135 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=591, Invalid=1479, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 18:08:35,135 INFO L78 Accepts]: Start accepts. Automaton has 125771 states and 367943 transitions. Word has length 66 [2021-01-20 18:08:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:35,136 INFO L481 AbstractCegarLoop]: Abstraction has 125771 states and 367943 transitions. [2021-01-20 18:08:35,136 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 18:08:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 125771 states and 367943 transitions. [2021-01-20 18:08:35,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:08:35,314 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:35,315 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 18:08:35,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-20 18:08:35,516 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:35,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:35,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1334750316, now seen corresponding path program 27 times [2021-01-20 18:08:35,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:35,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746413334] [2021-01-20 18:08:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:35,733 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 18:08:35,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746413334] [2021-01-20 18:08:35,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170466787] [2021-01-20 18:08:35,734 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 18:08:35,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 18:08:35,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:35,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:08:35,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:35,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:35,859 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 18:08:35,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:35,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-20 18:08:35,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088872474] [2021-01-20 18:08:35,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:08:35,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:35,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:08:35,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:08:35,861 INFO L87 Difference]: Start difference. First operand 125771 states and 367943 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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 18:08:37,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:37,570 INFO L93 Difference]: Finished difference Result 128139 states and 374919 transitions. [2021-01-20 18:08:37,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-20 18:08:37,570 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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 18:08:37,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:37,571 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 18:08:37,571 INFO L78 Accepts]: Start accepts. Automaton has 128139 states and 374919 transitions. Word has length 71 [2021-01-20 18:08:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:37,572 INFO L481 AbstractCegarLoop]: Abstraction has 128139 states and 374919 transitions. [2021-01-20 18:08:37,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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 18:08:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 128139 states and 374919 transitions. [2021-01-20 18:08:37,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:08:37,696 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:37,696 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 18:08:37,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:37,910 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:37,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:37,910 INFO L82 PathProgramCache]: Analyzing trace with hash -99594946, now seen corresponding path program 28 times [2021-01-20 18:08:37,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:37,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477696412] [2021-01-20 18:08:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:38,128 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 18:08:38,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477696412] [2021-01-20 18:08:38,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399834957] [2021-01-20 18:08:38,128 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 18:08:38,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:08:38,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:38,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:08:38,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:38,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:38,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:38,252 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 18:08:38,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:38,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 18:08:38,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727495908] [2021-01-20 18:08:38,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:08:38,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:38,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:08:38,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:08:38,253 INFO L87 Difference]: Start difference. First operand 128139 states and 374919 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 18:08:39,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:39,254 INFO L93 Difference]: Finished difference Result 130379 states and 381511 transitions. [2021-01-20 18:08:39,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:08:39,254 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 18:08:39,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:39,255 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=1028, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:08:39,255 INFO L78 Accepts]: Start accepts. Automaton has 130379 states and 381511 transitions. Word has length 71 [2021-01-20 18:08:39,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:39,255 INFO L481 AbstractCegarLoop]: Abstraction has 130379 states and 381511 transitions. [2021-01-20 18:08:39,255 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 18:08:39,255 INFO L276 IsEmpty]: Start isEmpty. Operand 130379 states and 381511 transitions. [2021-01-20 18:08:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:08:40,112 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:40,112 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 18:08:40,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-20 18:08:40,328 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:40,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:40,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1726601048, now seen corresponding path program 29 times [2021-01-20 18:08:40,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:40,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802461699] [2021-01-20 18:08:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:40,501 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 18:08:40,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802461699] [2021-01-20 18:08:40,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526102818] [2021-01-20 18:08:40,502 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 18:08:40,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 18:08:40,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:40,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:08:40,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:40,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:40,600 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 18:08:40,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:40,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-20 18:08:40,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112631559] [2021-01-20 18:08:40,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:08:40,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:40,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:08:40,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:08:40,607 INFO L87 Difference]: Start difference. First operand 130379 states and 381511 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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 18:08:41,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:41,575 INFO L93 Difference]: Finished difference Result 132747 states and 388487 transitions. [2021-01-20 18:08:41,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 18:08:41,576 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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 18:08:41,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:41,576 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 18:08:41,577 INFO L78 Accepts]: Start accepts. Automaton has 132747 states and 388487 transitions. Word has length 71 [2021-01-20 18:08:41,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:41,577 INFO L481 AbstractCegarLoop]: Abstraction has 132747 states and 388487 transitions. [2021-01-20 18:08:41,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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 18:08:41,577 INFO L276 IsEmpty]: Start isEmpty. Operand 132747 states and 388487 transitions. [2021-01-20 18:08:41,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:08:41,691 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:41,692 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 18:08:41,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-20 18:08:41,893 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:41,894 INFO L82 PathProgramCache]: Analyzing trace with hash -406694360, now seen corresponding path program 30 times [2021-01-20 18:08:41,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:41,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391285938] [2021-01-20 18:08:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:42,730 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-01-20 18:08:42,843 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2021-01-20 18:08:42,867 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 18:08:42,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391285938] [2021-01-20 18:08:42,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093366408] [2021-01-20 18:08:42,868 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 18:08:42,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 18:08:42,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:42,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:08:42,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:42,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:42,992 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:43,007 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 18:08:43,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:43,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 18:08:43,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447638193] [2021-01-20 18:08:43,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:08:43,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:43,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:08:43,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:08:43,009 INFO L87 Difference]: Start difference. First operand 132747 states and 388487 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 18:08:44,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:44,161 INFO L93 Difference]: Finished difference Result 136331 states and 398983 transitions. [2021-01-20 18:08:44,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-20 18:08:44,161 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 18:08:44,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:44,162 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 18:08:44,162 INFO L78 Accepts]: Start accepts. Automaton has 136331 states and 398983 transitions. Word has length 71 [2021-01-20 18:08:44,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:44,163 INFO L481 AbstractCegarLoop]: Abstraction has 136331 states and 398983 transitions. [2021-01-20 18:08:44,163 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 18:08:44,163 INFO L276 IsEmpty]: Start isEmpty. Operand 136331 states and 398983 transitions. [2021-01-20 18:08:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:08:44,280 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:44,280 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 18:08:44,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-20 18:08:44,481 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:44,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:44,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1483906518, now seen corresponding path program 31 times [2021-01-20 18:08:44,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:44,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341515906] [2021-01-20 18:08:44,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:44,656 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 18:08:44,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341515906] [2021-01-20 18:08:44,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578266769] [2021-01-20 18:08:44,657 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 18:08:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:44,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:08:44,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:44,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:45,355 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 18:08:45,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:45,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-20 18:08:45,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359143076] [2021-01-20 18:08:45,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:08:45,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:45,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:08:45,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:08:45,357 INFO L87 Difference]: Start difference. First operand 136331 states and 398983 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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 18:08:46,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:46,682 INFO L93 Difference]: Finished difference Result 138443 states and 405191 transitions. [2021-01-20 18:08:46,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:08:46,683 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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 18:08:46,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:46,683 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=458, Invalid=1182, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 18:08:46,684 INFO L78 Accepts]: Start accepts. Automaton has 138443 states and 405191 transitions. Word has length 71 [2021-01-20 18:08:46,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:46,684 INFO L481 AbstractCegarLoop]: Abstraction has 138443 states and 405191 transitions. [2021-01-20 18:08:46,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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 18:08:46,684 INFO L276 IsEmpty]: Start isEmpty. Operand 138443 states and 405191 transitions. [2021-01-20 18:08:46,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:08:46,829 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:46,829 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 18:08:47,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-20 18:08:47,030 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:47,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:47,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1589354330, now seen corresponding path program 32 times [2021-01-20 18:08:47,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:47,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343837530] [2021-01-20 18:08:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:47,233 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 18:08:47,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343837530] [2021-01-20 18:08:47,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784167287] [2021-01-20 18:08:47,233 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 18:08:47,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:08:47,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:47,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:08:47,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:47,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:47,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:47,386 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 18:08:47,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:47,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 18:08:47,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724358106] [2021-01-20 18:08:47,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:08:47,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:47,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:08:47,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:08:47,389 INFO L87 Difference]: Start difference. First operand 138443 states and 405191 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 18:08:48,689 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2021-01-20 18:08:49,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:49,332 INFO L93 Difference]: Finished difference Result 140171 states and 410247 transitions. [2021-01-20 18:08:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 18:08:49,333 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 18:08:49,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:49,334 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=488, Invalid=1318, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 18:08:49,334 INFO L78 Accepts]: Start accepts. Automaton has 140171 states and 410247 transitions. Word has length 71 [2021-01-20 18:08:49,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:49,334 INFO L481 AbstractCegarLoop]: Abstraction has 140171 states and 410247 transitions. [2021-01-20 18:08:49,334 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 18:08:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 140171 states and 410247 transitions. [2021-01-20 18:08:49,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:08:49,451 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:49,451 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 18:08:49,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:49,652 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1615579604, now seen corresponding path program 33 times [2021-01-20 18:08:49,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:49,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869678811] [2021-01-20 18:08:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:49,823 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 18:08:49,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869678811] [2021-01-20 18:08:49,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911066486] [2021-01-20 18:08:49,823 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 18:08:49,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-20 18:08:49,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:49,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:08:49,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:49,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:49,933 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 18:08:49,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:49,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-20 18:08:49,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449132063] [2021-01-20 18:08:49,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:08:49,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:49,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:08:49,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:08:49,935 INFO L87 Difference]: Start difference. First operand 140171 states and 410247 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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 18:08:51,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:51,827 INFO L93 Difference]: Finished difference Result 142027 states and 415687 transitions. [2021-01-20 18:08:51,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 18:08:51,828 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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 18:08:51,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:51,828 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=520, Invalid=1286, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 18:08:51,829 INFO L78 Accepts]: Start accepts. Automaton has 142027 states and 415687 transitions. Word has length 71 [2021-01-20 18:08:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:51,829 INFO L481 AbstractCegarLoop]: Abstraction has 142027 states and 415687 transitions. [2021-01-20 18:08:51,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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 18:08:51,829 INFO L276 IsEmpty]: Start isEmpty. Operand 142027 states and 415687 transitions. [2021-01-20 18:08:51,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:08:51,945 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:51,945 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 18:08:52,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-20 18:08:52,146 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:52,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1759784796, now seen corresponding path program 34 times [2021-01-20 18:08:52,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:52,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869832688] [2021-01-20 18:08:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:52,325 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 18:08:52,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869832688] [2021-01-20 18:08:52,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973384654] [2021-01-20 18:08:52,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:08:52,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:08:52,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:52,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:08:52,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:52,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:52,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:52,446 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 18:08:52,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:52,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 18:08:52,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376284356] [2021-01-20 18:08:52,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:08:52,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:52,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:08:52,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:08:52,448 INFO L87 Difference]: Start difference. First operand 142027 states and 415687 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 18:08:54,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:54,568 INFO L93 Difference]: Finished difference Result 144907 states and 424071 transitions. [2021-01-20 18:08:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 18:08:54,569 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 18:08:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:54,569 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=550, Invalid=1430, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:08:54,569 INFO L78 Accepts]: Start accepts. Automaton has 144907 states and 424071 transitions. Word has length 71 [2021-01-20 18:08:54,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:54,570 INFO L481 AbstractCegarLoop]: Abstraction has 144907 states and 424071 transitions. [2021-01-20 18:08:54,570 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 18:08:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 144907 states and 424071 transitions. [2021-01-20 18:08:54,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:08:54,691 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:54,691 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 18:08:54,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-20 18:08:54,892 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:54,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1407708878, now seen corresponding path program 35 times [2021-01-20 18:08:54,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:54,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120414384] [2021-01-20 18:08:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:55,045 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 18:08:55,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120414384] [2021-01-20 18:08:55,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704206680] [2021-01-20 18:08:55,046 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 18:08:55,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-20 18:08:55,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:55,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:08:55,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:55,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:55,151 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 18:08:55,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:55,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-20 18:08:55,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452384595] [2021-01-20 18:08:55,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 18:08:55,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:55,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 18:08:55,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-01-20 18:08:55,152 INFO L87 Difference]: Start difference. First operand 144907 states and 424071 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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 18:08:57,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:08:57,096 INFO L93 Difference]: Finished difference Result 148171 states and 433671 transitions. [2021-01-20 18:08:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:08:57,096 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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 18:08:57,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:08:57,097 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=602, Invalid=1378, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:08:57,097 INFO L78 Accepts]: Start accepts. Automaton has 148171 states and 433671 transitions. Word has length 71 [2021-01-20 18:08:57,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:08:57,098 INFO L481 AbstractCegarLoop]: Abstraction has 148171 states and 433671 transitions. [2021-01-20 18:08:57,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 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 18:08:57,098 INFO L276 IsEmpty]: Start isEmpty. Operand 148171 states and 433671 transitions. [2021-01-20 18:08:57,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-20 18:08:57,261 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:08:57,261 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 18:08:57,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:08:57,462 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:08:57,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:08:57,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1410682108, now seen corresponding path program 36 times [2021-01-20 18:08:57,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:08:57,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380242274] [2021-01-20 18:08:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:08:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:08:57,631 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 18:08:57,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380242274] [2021-01-20 18:08:57,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169567927] [2021-01-20 18:08:57,632 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 18:08:57,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-20 18:08:57,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:08:57,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 18:08:57,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:08:57,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:08:57,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:08:57,785 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 18:08:57,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:08:57,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-20 18:08:57,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484564513] [2021-01-20 18:08:57,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-20 18:08:57,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:08:57,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-20 18:08:57,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-01-20 18:08:57,788 INFO L87 Difference]: Start difference. First operand 148171 states and 433671 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 18:09:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:00,123 INFO L93 Difference]: Finished difference Result 148427 states and 434375 transitions. [2021-01-20 18:09:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 18:09:00,124 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 18:09:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:00,125 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 18:09:00,125 INFO L78 Accepts]: Start accepts. Automaton has 148427 states and 434375 transitions. Word has length 71 [2021-01-20 18:09:00,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:00,125 INFO L481 AbstractCegarLoop]: Abstraction has 148427 states and 434375 transitions. [2021-01-20 18:09:00,125 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 18:09:00,125 INFO L276 IsEmpty]: Start isEmpty. Operand 148427 states and 434375 transitions. [2021-01-20 18:09:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:09:00,261 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:00,261 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 18:09:00,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-20 18:09:00,462 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:00,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:00,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1682215820, now seen corresponding path program 37 times [2021-01-20 18:09:00,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:00,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217977740] [2021-01-20 18:09:00,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:00,709 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 18:09:00,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217977740] [2021-01-20 18:09:00,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317212406] [2021-01-20 18:09:00,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:09:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:00,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:09:00,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:00,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:00,829 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 18:09:00,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:00,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:09:00,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583012199] [2021-01-20 18:09:00,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:09:00,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:00,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:09:00,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:09:00,831 INFO L87 Difference]: Start difference. First operand 148427 states and 434375 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 18:09:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:01,871 INFO L93 Difference]: Finished difference Result 151691 states and 444039 transitions. [2021-01-20 18:09:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 18:09:01,871 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 18:09:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:01,872 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 18:09:01,872 INFO L78 Accepts]: Start accepts. Automaton has 151691 states and 444039 transitions. Word has length 76 [2021-01-20 18:09:01,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:01,872 INFO L481 AbstractCegarLoop]: Abstraction has 151691 states and 444039 transitions. [2021-01-20 18:09:01,873 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 18:09:01,873 INFO L276 IsEmpty]: Start isEmpty. Operand 151691 states and 444039 transitions. [2021-01-20 18:09:02,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:09:02,743 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:02,743 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 18:09:02,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:02,959 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:02,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:02,960 INFO L82 PathProgramCache]: Analyzing trace with hash 247870558, now seen corresponding path program 38 times [2021-01-20 18:09:02,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:02,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204504361] [2021-01-20 18:09:02,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:03,202 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 18:09:03,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204504361] [2021-01-20 18:09:03,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287380938] [2021-01-20 18:09:03,203 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 18:09:03,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:09:03,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:03,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:09:03,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:03,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:03,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:03,351 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 18:09:03,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:03,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-20 18:09:03,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925987176] [2021-01-20 18:09:03,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:09:03,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:03,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:09:03,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:09:03,353 INFO L87 Difference]: Start difference. First operand 151691 states and 444039 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 18:09:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:04,602 INFO L93 Difference]: Finished difference Result 153803 states and 450247 transitions. [2021-01-20 18:09:04,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:09:04,603 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 18:09:04,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:04,604 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 18:09:04,604 INFO L78 Accepts]: Start accepts. Automaton has 153803 states and 450247 transitions. Word has length 76 [2021-01-20 18:09:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:04,604 INFO L481 AbstractCegarLoop]: Abstraction has 153803 states and 450247 transitions. [2021-01-20 18:09:04,604 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 18:09:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 153803 states and 450247 transitions. [2021-01-20 18:09:05,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:09:05,401 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:05,401 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 18:09:05,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-20 18:09:05,615 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:05,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2074066552, now seen corresponding path program 39 times [2021-01-20 18:09:05,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:05,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198089845] [2021-01-20 18:09:05,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:05,825 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 18:09:05,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198089845] [2021-01-20 18:09:05,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858492649] [2021-01-20 18:09:05,825 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 18:09:05,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 18:09:05,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:05,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:09:05,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:05,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:05,957 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 18:09:05,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:05,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:09:05,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901550415] [2021-01-20 18:09:05,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:09:05,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:05,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:09:05,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:09:05,959 INFO L87 Difference]: Start difference. First operand 153803 states and 450247 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 18:09:07,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:07,088 INFO L93 Difference]: Finished difference Result 156043 states and 456839 transitions. [2021-01-20 18:09:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 18:09:07,089 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 18:09:07,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:07,090 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 18:09:07,090 INFO L78 Accepts]: Start accepts. Automaton has 156043 states and 456839 transitions. Word has length 76 [2021-01-20 18:09:07,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:07,090 INFO L481 AbstractCegarLoop]: Abstraction has 156043 states and 456839 transitions. [2021-01-20 18:09:07,091 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 18:09:07,091 INFO L276 IsEmpty]: Start isEmpty. Operand 156043 states and 456839 transitions. [2021-01-20 18:09:07,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:09:07,227 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:07,227 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 18:09:07,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:07,428 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:07,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:07,429 INFO L82 PathProgramCache]: Analyzing trace with hash -59228856, now seen corresponding path program 40 times [2021-01-20 18:09:07,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:07,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594948945] [2021-01-20 18:09:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:08,450 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 18:09:08,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594948945] [2021-01-20 18:09:08,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325367476] [2021-01-20 18:09:08,450 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 18:09:08,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:09:08,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:08,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:09:08,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:08,560 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:08,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:08,621 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 18:09:08,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:08,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-20 18:09:08,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683647380] [2021-01-20 18:09:08,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:09:08,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:08,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:09:08,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:09:08,624 INFO L87 Difference]: Start difference. First operand 156043 states and 456839 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 18:09:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:10,208 INFO L93 Difference]: Finished difference Result 158027 states and 462663 transitions. [2021-01-20 18:09:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 18:09:10,209 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 18:09:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:10,210 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=565, Invalid=1505, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 18:09:10,210 INFO L78 Accepts]: Start accepts. Automaton has 158027 states and 462663 transitions. Word has length 76 [2021-01-20 18:09:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:10,211 INFO L481 AbstractCegarLoop]: Abstraction has 158027 states and 462663 transitions. [2021-01-20 18:09:10,211 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 18:09:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 158027 states and 462663 transitions. [2021-01-20 18:09:10,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:09:10,344 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:10,344 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 18:09:10,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-20 18:09:10,545 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1831372022, now seen corresponding path program 41 times [2021-01-20 18:09:10,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:10,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298670741] [2021-01-20 18:09:10,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:10,740 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 18:09:10,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298670741] [2021-01-20 18:09:10,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262755703] [2021-01-20 18:09:10,740 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 18:09:10,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-20 18:09:10,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:10,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:09:10,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:10,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:10,862 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 18:09:10,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:10,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:09:10,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465673545] [2021-01-20 18:09:10,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:09:10,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:10,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:09:10,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:09:10,863 INFO L87 Difference]: Start difference. First operand 158027 states and 462663 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 18:09:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:12,858 INFO L93 Difference]: Finished difference Result 160011 states and 468487 transitions. [2021-01-20 18:09:12,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:09:12,859 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 18:09:12,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:12,859 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 18:09:12,860 INFO L78 Accepts]: Start accepts. Automaton has 160011 states and 468487 transitions. Word has length 76 [2021-01-20 18:09:12,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:12,860 INFO L481 AbstractCegarLoop]: Abstraction has 160011 states and 468487 transitions. [2021-01-20 18:09:12,860 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 18:09:12,860 INFO L276 IsEmpty]: Start isEmpty. Operand 160011 states and 468487 transitions. [2021-01-20 18:09:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:09:12,997 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:12,997 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 18:09:13,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-20 18:09:13,198 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:13,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1241888826, now seen corresponding path program 42 times [2021-01-20 18:09:13,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:13,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377436738] [2021-01-20 18:09:13,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:13,413 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 18:09:13,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377436738] [2021-01-20 18:09:13,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534241975] [2021-01-20 18:09:13,413 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 18:09:13,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-20 18:09:13,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:13,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:09:13,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:13,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:13,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:13,566 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 18:09:13,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:13,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-20 18:09:13,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162433477] [2021-01-20 18:09:13,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:09:13,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:13,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:09:13,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:09:13,568 INFO L87 Difference]: Start difference. First operand 160011 states and 468487 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 18:09:14,798 WARN L193 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 11 [2021-01-20 18:09:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:15,851 INFO L93 Difference]: Finished difference Result 161739 states and 473543 transitions. [2021-01-20 18:09:15,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:09:15,852 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 18:09:15,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:15,852 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=615, Invalid=1641, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 18:09:15,853 INFO L78 Accepts]: Start accepts. Automaton has 161739 states and 473543 transitions. Word has length 76 [2021-01-20 18:09:15,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:15,853 INFO L481 AbstractCegarLoop]: Abstraction has 161739 states and 473543 transitions. [2021-01-20 18:09:15,853 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 18:09:15,853 INFO L276 IsEmpty]: Start isEmpty. Operand 161739 states and 473543 transitions. [2021-01-20 18:09:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:09:15,987 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:15,987 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 18:09:16,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:16,188 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:16,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1963045108, now seen corresponding path program 43 times [2021-01-20 18:09:16,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:16,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722373295] [2021-01-20 18:09:16,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:16,358 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 18:09:16,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722373295] [2021-01-20 18:09:16,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245246989] [2021-01-20 18:09:16,359 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 18:09:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:16,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:09:16,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:16,535 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:16,554 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 18:09:16,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:16,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:09:16,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51283307] [2021-01-20 18:09:16,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:09:16,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:16,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:09:16,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:09:16,556 INFO L87 Difference]: Start difference. First operand 161739 states and 473543 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 18:09:17,973 WARN L193 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-01-20 18:09:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:18,783 INFO L93 Difference]: Finished difference Result 163595 states and 478983 transitions. [2021-01-20 18:09:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 18:09:18,787 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 18:09:18,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:18,787 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=562, Invalid=1418, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:09:18,788 INFO L78 Accepts]: Start accepts. Automaton has 163595 states and 478983 transitions. Word has length 76 [2021-01-20 18:09:18,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:18,788 INFO L481 AbstractCegarLoop]: Abstraction has 163595 states and 478983 transitions. [2021-01-20 18:09:18,788 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 18:09:18,788 INFO L276 IsEmpty]: Start isEmpty. Operand 163595 states and 478983 transitions. [2021-01-20 18:09:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:09:18,921 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:18,921 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 18:09:19,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-01-20 18:09:19,122 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:19,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:19,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1412319292, now seen corresponding path program 44 times [2021-01-20 18:09:19,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:19,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282873058] [2021-01-20 18:09:19,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:19,323 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 18:09:19,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282873058] [2021-01-20 18:09:19,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25724145] [2021-01-20 18:09:19,324 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 18:09:19,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:09:19,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:19,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:09:19,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:19,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:19,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:19,489 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 18:09:19,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:19,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-20 18:09:19,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005137229] [2021-01-20 18:09:19,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:09:19,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:19,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:09:19,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:09:19,496 INFO L87 Difference]: Start difference. First operand 163595 states and 478983 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 18:09:22,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:22,077 INFO L93 Difference]: Finished difference Result 166475 states and 487367 transitions. [2021-01-20 18:09:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 18:09:22,078 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 18:09:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:22,079 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=685, Invalid=1765, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 18:09:22,079 INFO L78 Accepts]: Start accepts. Automaton has 166475 states and 487367 transitions. Word has length 76 [2021-01-20 18:09:22,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:22,079 INFO L481 AbstractCegarLoop]: Abstraction has 166475 states and 487367 transitions. [2021-01-20 18:09:22,080 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 18:09:22,080 INFO L276 IsEmpty]: Start isEmpty. Operand 166475 states and 487367 transitions. [2021-01-20 18:09:22,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:09:22,229 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:22,229 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 18:09:22,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:22,435 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:22,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:22,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1060243374, now seen corresponding path program 45 times [2021-01-20 18:09:22,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:22,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225665884] [2021-01-20 18:09:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:22,605 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 18:09:22,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225665884] [2021-01-20 18:09:22,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135952349] [2021-01-20 18:09:22,606 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 18:09:22,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 18:09:22,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:22,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-20 18:09:22,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:22,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:22,724 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 18:09:22,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:22,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-20 18:09:22,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568761455] [2021-01-20 18:09:22,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 18:09:22,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:22,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 18:09:22,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-01-20 18:09:22,726 INFO L87 Difference]: Start difference. First operand 166475 states and 487367 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 18:09:24,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:24,992 INFO L93 Difference]: Finished difference Result 169739 states and 496967 transitions. [2021-01-20 18:09:24,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:09:24,992 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 18:09:24,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:24,993 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=644, Invalid=1518, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 18:09:24,993 INFO L78 Accepts]: Start accepts. Automaton has 169739 states and 496967 transitions. Word has length 76 [2021-01-20 18:09:24,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:24,993 INFO L481 AbstractCegarLoop]: Abstraction has 169739 states and 496967 transitions. [2021-01-20 18:09:24,993 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 18:09:24,993 INFO L276 IsEmpty]: Start isEmpty. Operand 169739 states and 496967 transitions. [2021-01-20 18:09:25,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-20 18:09:25,121 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:25,121 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 18:09:25,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:25,323 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:25,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:25,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1063216604, now seen corresponding path program 46 times [2021-01-20 18:09:25,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:25,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763707667] [2021-01-20 18:09:25,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:25,500 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 18:09:25,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763707667] [2021-01-20 18:09:25,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778957046] [2021-01-20 18:09:25,500 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 18:09:25,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:09:25,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:25,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:09:25,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:25,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:25,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:25,643 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 18:09:25,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:25,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-20 18:09:25,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84779835] [2021-01-20 18:09:25,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:09:25,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:25,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:09:25,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:09:25,645 INFO L87 Difference]: Start difference. First operand 169739 states and 496967 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 18:09:28,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:28,224 INFO L93 Difference]: Finished difference Result 173195 states and 506951 transitions. [2021-01-20 18:09:28,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 18:09:28,224 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 18:09:28,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:28,225 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=816, Invalid=2046, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 18:09:28,225 INFO L78 Accepts]: Start accepts. Automaton has 173195 states and 506951 transitions. Word has length 76 [2021-01-20 18:09:28,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:28,225 INFO L481 AbstractCegarLoop]: Abstraction has 173195 states and 506951 transitions. [2021-01-20 18:09:28,225 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 18:09:28,225 INFO L276 IsEmpty]: Start isEmpty. Operand 173195 states and 506951 transitions. [2021-01-20 18:09:28,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:09:28,374 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:28,374 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 18:09:28,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-20 18:09:28,575 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:28,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:28,576 INFO L82 PathProgramCache]: Analyzing trace with hash -298810531, now seen corresponding path program 47 times [2021-01-20 18:09:28,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:28,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944081074] [2021-01-20 18:09:28,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:28,815 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 18:09:28,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944081074] [2021-01-20 18:09:28,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602545775] [2021-01-20 18:09:28,816 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 18:09:28,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-20 18:09:28,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:28,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:09:28,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:28,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:28,953 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 18:09:28,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:28,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:09:28,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553361672] [2021-01-20 18:09:28,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:09:28,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:28,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:09:28,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:09:28,955 INFO L87 Difference]: Start difference. First operand 173195 states and 506951 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 18:09:30,234 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-01-20 18:09:30,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:30,888 INFO L93 Difference]: Finished difference Result 175691 states and 514311 transitions. [2021-01-20 18:09:30,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 18:09:30,889 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 18:09:30,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:30,889 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=504, Invalid=1136, Unknown=0, NotChecked=0, Total=1640 [2021-01-20 18:09:30,889 INFO L78 Accepts]: Start accepts. Automaton has 175691 states and 514311 transitions. Word has length 81 [2021-01-20 18:09:30,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:30,890 INFO L481 AbstractCegarLoop]: Abstraction has 175691 states and 514311 transitions. [2021-01-20 18:09:30,890 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 18:09:30,890 INFO L276 IsEmpty]: Start isEmpty. Operand 175691 states and 514311 transitions. [2021-01-20 18:09:31,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:09:31,053 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:31,053 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 18:09:31,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:31,254 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:31,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:31,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1053083055, now seen corresponding path program 48 times [2021-01-20 18:09:31,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:31,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256708128] [2021-01-20 18:09:31,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:31,518 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 18:09:31,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256708128] [2021-01-20 18:09:31,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546972702] [2021-01-20 18:09:31,519 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 18:09:31,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-20 18:09:31,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:31,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:09:31,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:31,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:31,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:31,678 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 18:09:31,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:31,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:09:31,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978572652] [2021-01-20 18:09:31,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:09:31,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:31,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:09:31,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:09:31,680 INFO L87 Difference]: Start difference. First operand 175691 states and 514311 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 18:09:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:34,246 INFO L93 Difference]: Finished difference Result 178059 states and 521287 transitions. [2021-01-20 18:09:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 18:09:34,247 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 18:09:34,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:34,248 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 18:09:34,248 INFO L78 Accepts]: Start accepts. Automaton has 178059 states and 521287 transitions. Word has length 81 [2021-01-20 18:09:34,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:34,248 INFO L481 AbstractCegarLoop]: Abstraction has 178059 states and 521287 transitions. [2021-01-20 18:09:34,248 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 18:09:34,248 INFO L276 IsEmpty]: Start isEmpty. Operand 178059 states and 521287 transitions. [2021-01-20 18:09:34,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:09:34,579 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:34,579 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 18:09:34,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-20 18:09:34,792 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:34,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:34,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1745619127, now seen corresponding path program 49 times [2021-01-20 18:09:34,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:34,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984202441] [2021-01-20 18:09:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:35,175 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 18:09:35,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984202441] [2021-01-20 18:09:35,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604173721] [2021-01-20 18:09:35,176 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 18:09:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:35,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:09:35,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:35,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:35,308 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 18:09:35,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:35,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:09:35,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147198203] [2021-01-20 18:09:35,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:09:35,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:35,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:09:35,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:09:35,310 INFO L87 Difference]: Start difference. First operand 178059 states and 521287 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 18:09:37,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:37,651 INFO L93 Difference]: Finished difference Result 180555 states and 528647 transitions. [2021-01-20 18:09:37,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-20 18:09:37,652 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 18:09:37,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:37,652 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=539, Invalid=1441, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:09:37,653 INFO L78 Accepts]: Start accepts. Automaton has 180555 states and 528647 transitions. Word has length 81 [2021-01-20 18:09:37,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:37,653 INFO L481 AbstractCegarLoop]: Abstraction has 180555 states and 528647 transitions. [2021-01-20 18:09:37,653 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 18:09:37,653 INFO L276 IsEmpty]: Start isEmpty. Operand 180555 states and 528647 transitions. [2021-01-20 18:09:37,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:09:37,953 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:37,954 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 18:09:38,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-20 18:09:38,167 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:38,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1956131353, now seen corresponding path program 50 times [2021-01-20 18:09:38,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:38,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727011970] [2021-01-20 18:09:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:38,549 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 18:09:38,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727011970] [2021-01-20 18:09:38,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823654996] [2021-01-20 18:09:38,549 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 18:09:38,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:09:38,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:38,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:09:38,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:38,645 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:38,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:38,893 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 18:09:38,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:38,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:09:38,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312193119] [2021-01-20 18:09:38,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:09:38,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:38,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:09:38,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:09:38,895 INFO L87 Difference]: Start difference. First operand 180555 states and 528647 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 18:09:41,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:41,283 INFO L93 Difference]: Finished difference Result 184267 states and 539527 transitions. [2021-01-20 18:09:41,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 18:09:41,284 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 18:09:41,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:41,285 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=620, Invalid=1636, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 18:09:41,285 INFO L78 Accepts]: Start accepts. Automaton has 184267 states and 539527 transitions. Word has length 81 [2021-01-20 18:09:41,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:41,285 INFO L481 AbstractCegarLoop]: Abstraction has 184267 states and 539527 transitions. [2021-01-20 18:09:41,285 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 18:09:41,285 INFO L276 IsEmpty]: Start isEmpty. Operand 184267 states and 539527 transitions. [2021-01-20 18:09:41,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:09:41,519 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:41,519 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 18:09:41,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-20 18:09:41,733 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:41,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:41,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1783445575, now seen corresponding path program 51 times [2021-01-20 18:09:41,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:41,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868593506] [2021-01-20 18:09:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:42,096 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 18:09:42,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868593506] [2021-01-20 18:09:42,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923321618] [2021-01-20 18:09:42,097 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 18:09:42,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 18:09:42,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:42,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:09:42,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:42,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:42,258 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 18:09:42,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:42,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:09:42,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553618386] [2021-01-20 18:09:42,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:09:42,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:42,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:09:42,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:09:42,260 INFO L87 Difference]: Start difference. First operand 184267 states and 539527 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 18:09:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:44,555 INFO L93 Difference]: Finished difference Result 186507 states and 546119 transitions. [2021-01-20 18:09:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:09:44,556 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 18:09:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:44,570 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=1629, Unknown=0, NotChecked=0, Total=2256 [2021-01-20 18:09:44,570 INFO L78 Accepts]: Start accepts. Automaton has 186507 states and 546119 transitions. Word has length 81 [2021-01-20 18:09:44,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:44,570 INFO L481 AbstractCegarLoop]: Abstraction has 186507 states and 546119 transitions. [2021-01-20 18:09:44,570 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 18:09:44,571 INFO L276 IsEmpty]: Start isEmpty. Operand 186507 states and 546119 transitions. [2021-01-20 18:09:45,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:09:45,003 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:45,004 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 18:09:45,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-20 18:09:45,218 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:45,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:45,219 INFO L82 PathProgramCache]: Analyzing trace with hash -349849833, now seen corresponding path program 52 times [2021-01-20 18:09:45,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:45,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847476131] [2021-01-20 18:09:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:45,457 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 18:09:45,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847476131] [2021-01-20 18:09:45,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330647973] [2021-01-20 18:09:45,457 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 18:09:45,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:09:45,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:45,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-20 18:09:45,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:45,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:45,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:45,605 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 18:09:45,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:45,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:09:45,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100658471] [2021-01-20 18:09:45,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:09:45,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:45,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:09:45,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:09:45,607 INFO L87 Difference]: Start difference. First operand 186507 states and 546119 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 18:09:48,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:48,151 INFO L93 Difference]: Finished difference Result 188363 states and 551559 transitions. [2021-01-20 18:09:48,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 18:09:48,152 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 18:09:48,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:48,153 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=659, Invalid=1791, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 18:09:48,153 INFO L78 Accepts]: Start accepts. Automaton has 188363 states and 551559 transitions. Word has length 81 [2021-01-20 18:09:48,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:48,154 INFO L481 AbstractCegarLoop]: Abstraction has 188363 states and 551559 transitions. [2021-01-20 18:09:48,154 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 18:09:48,154 INFO L276 IsEmpty]: Start isEmpty. Operand 188363 states and 551559 transitions. [2021-01-20 18:09:48,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:09:48,417 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:48,417 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 18:09:48,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:48,631 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:48,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1540751045, now seen corresponding path program 53 times [2021-01-20 18:09:48,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:48,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922061099] [2021-01-20 18:09:48,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:49,196 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 18:09:49,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922061099] [2021-01-20 18:09:49,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041418700] [2021-01-20 18:09:49,199 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 18:09:49,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-20 18:09:49,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:49,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:09:49,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:49,305 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:49,318 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 18:09:49,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:49,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:09:49,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648269076] [2021-01-20 18:09:49,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:09:49,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:49,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:09:49,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:09:49,320 INFO L87 Difference]: Start difference. First operand 188363 states and 551559 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 18:09:51,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:51,698 INFO L93 Difference]: Finished difference Result 190347 states and 557383 transitions. [2021-01-20 18:09:51,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 18:09:51,702 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 18:09:51,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:51,703 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 18:09:51,703 INFO L78 Accepts]: Start accepts. Automaton has 190347 states and 557383 transitions. Word has length 81 [2021-01-20 18:09:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:51,703 INFO L481 AbstractCegarLoop]: Abstraction has 190347 states and 557383 transitions. [2021-01-20 18:09:51,703 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 18:09:51,703 INFO L276 IsEmpty]: Start isEmpty. Operand 190347 states and 557383 transitions. [2021-01-20 18:09:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:09:52,028 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:52,028 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 18:09:52,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:52,241 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:52,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:52,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1532509803, now seen corresponding path program 54 times [2021-01-20 18:09:52,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:52,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923098678] [2021-01-20 18:09:52,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:52,725 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 18:09:52,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923098678] [2021-01-20 18:09:52,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989472222] [2021-01-20 18:09:52,726 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 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 18:09:52,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-20 18:09:52,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:52,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:09:52,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:52,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:52,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:52,897 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 18:09:52,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:52,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:09:52,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936897301] [2021-01-20 18:09:52,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:09:52,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:52,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:09:52,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:09:52,900 INFO L87 Difference]: Start difference. First operand 190347 states and 557383 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 18:09:55,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:55,547 INFO L93 Difference]: Finished difference Result 191947 states and 562055 transitions. [2021-01-20 18:09:55,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-20 18:09:55,548 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 18:09:55,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:55,548 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=718, Invalid=1934, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 18:09:55,548 INFO L78 Accepts]: Start accepts. Automaton has 191947 states and 562055 transitions. Word has length 81 [2021-01-20 18:09:55,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:55,549 INFO L481 AbstractCegarLoop]: Abstraction has 191947 states and 562055 transitions. [2021-01-20 18:09:55,549 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 18:09:55,549 INFO L276 IsEmpty]: Start isEmpty. Operand 191947 states and 562055 transitions. [2021-01-20 18:09:55,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:09:55,792 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:55,792 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 18:09:56,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:09:56,006 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:56,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:56,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1672424131, now seen corresponding path program 55 times [2021-01-20 18:09:56,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:56,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048799969] [2021-01-20 18:09:56,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:56,234 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 18:09:56,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048799969] [2021-01-20 18:09:56,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492359157] [2021-01-20 18:09:56,235 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 18:09:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:56,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:09:56,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:56,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:56,392 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 18:09:56,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:56,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:09:56,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727107435] [2021-01-20 18:09:56,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:09:56,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:56,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:09:56,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:09:56,395 INFO L87 Difference]: Start difference. First operand 191947 states and 562055 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 18:09:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:09:58,949 INFO L93 Difference]: Finished difference Result 193803 states and 567495 transitions. [2021-01-20 18:09:58,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 18:09:58,951 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 18:09:58,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:09:58,952 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=765, Invalid=1887, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 18:09:58,952 INFO L78 Accepts]: Start accepts. Automaton has 193803 states and 567495 transitions. Word has length 81 [2021-01-20 18:09:58,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:09:58,952 INFO L481 AbstractCegarLoop]: Abstraction has 193803 states and 567495 transitions. [2021-01-20 18:09:58,952 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 18:09:58,952 INFO L276 IsEmpty]: Start isEmpty. Operand 193803 states and 567495 transitions. [2021-01-20 18:09:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:09:59,152 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:09:59,152 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 18:09:59,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-01-20 18:09:59,368 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:09:59,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:09:59,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1702940269, now seen corresponding path program 56 times [2021-01-20 18:09:59,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:09:59,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219353531] [2021-01-20 18:09:59,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:09:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:09:59,631 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 18:09:59,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219353531] [2021-01-20 18:09:59,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143458384] [2021-01-20 18:09:59,631 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 18:09:59,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:09:59,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:09:59,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:09:59,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:09:59,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:09:59,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:09:59,774 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 18:09:59,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:09:59,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:09:59,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224344887] [2021-01-20 18:09:59,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:09:59,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:09:59,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:09:59,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:09:59,776 INFO L87 Difference]: Start difference. First operand 193803 states and 567495 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 18:10:02,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:02,517 INFO L93 Difference]: Finished difference Result 196043 states and 574023 transitions. [2021-01-20 18:10:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 18:10:02,517 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 18:10:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:02,531 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 18:10:02,532 INFO L78 Accepts]: Start accepts. Automaton has 196043 states and 574023 transitions. Word has length 81 [2021-01-20 18:10:02,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:02,532 INFO L481 AbstractCegarLoop]: Abstraction has 196043 states and 574023 transitions. [2021-01-20 18:10:02,532 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 18:10:02,532 INFO L276 IsEmpty]: Start isEmpty. Operand 196043 states and 574023 transitions. [2021-01-20 18:10:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:10:02,732 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:02,733 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 18:10:02,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:02,946 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:02,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:02,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1350864351, now seen corresponding path program 57 times [2021-01-20 18:10:02,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:02,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367460601] [2021-01-20 18:10:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:03,225 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 18:10:03,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367460601] [2021-01-20 18:10:03,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065582205] [2021-01-20 18:10:03,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:10:03,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 18:10:03,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:03,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-20 18:10:03,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:03,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:03,375 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 18:10:03,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:03,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-20 18:10:03,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957612809] [2021-01-20 18:10:03,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 18:10:03,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:03,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 18:10:03,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-01-20 18:10:03,385 INFO L87 Difference]: Start difference. First operand 196043 states and 574023 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 18:10:06,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:06,204 INFO L93 Difference]: Finished difference Result 199307 states and 583623 transitions. [2021-01-20 18:10:06,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 18:10:06,204 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 18:10:06,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:06,205 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=864, Invalid=1998, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 18:10:06,205 INFO L78 Accepts]: Start accepts. Automaton has 199307 states and 583623 transitions. Word has length 81 [2021-01-20 18:10:06,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:06,205 INFO L481 AbstractCegarLoop]: Abstraction has 199307 states and 583623 transitions. [2021-01-20 18:10:06,205 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 18:10:06,205 INFO L276 IsEmpty]: Start isEmpty. Operand 199307 states and 583623 transitions. [2021-01-20 18:10:06,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-20 18:10:06,448 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:06,448 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 18:10:06,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-01-20 18:10:06,661 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:06,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:06,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1353837581, now seen corresponding path program 58 times [2021-01-20 18:10:06,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:06,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859722128] [2021-01-20 18:10:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:06,884 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 18:10:06,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859722128] [2021-01-20 18:10:06,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13202275] [2021-01-20 18:10:06,886 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 18:10:06,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:10:06,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:06,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-20 18:10:06,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:07,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:10:07,044 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:07,052 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 18:10:07,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:07,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-20 18:10:07,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226163192] [2021-01-20 18:10:07,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:10:07,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:07,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:10:07,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:10:07,054 INFO L87 Difference]: Start difference. First operand 199307 states and 583623 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 18:10:10,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:10,253 INFO L93 Difference]: Finished difference Result 200651 states and 587463 transitions. [2021-01-20 18:10:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-20 18:10:10,254 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 18:10:10,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:10,255 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=940, Invalid=2366, Unknown=0, NotChecked=0, Total=3306 [2021-01-20 18:10:10,255 INFO L78 Accepts]: Start accepts. Automaton has 200651 states and 587463 transitions. Word has length 81 [2021-01-20 18:10:10,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:10,256 INFO L481 AbstractCegarLoop]: Abstraction has 200651 states and 587463 transitions. [2021-01-20 18:10:10,256 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 18:10:10,256 INFO L276 IsEmpty]: Start isEmpty. Operand 200651 states and 587463 transitions. [2021-01-20 18:10:10,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:10:10,542 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:10,542 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 18:10:10,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:10,755 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:10,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:10,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1585971837, now seen corresponding path program 59 times [2021-01-20 18:10:10,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:10,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676017564] [2021-01-20 18:10:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:11,052 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 18:10:11,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676017564] [2021-01-20 18:10:11,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819822484] [2021-01-20 18:10:11,053 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 18:10:11,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-20 18:10:11,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:11,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:10:11,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:11,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:11,720 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 18:10:11,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:11,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:10:11,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098569938] [2021-01-20 18:10:11,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:10:11,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:11,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:10:11,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:10:11,734 INFO L87 Difference]: Start difference. First operand 200651 states and 587463 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 18:10:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:14,214 INFO L93 Difference]: Finished difference Result 204171 states and 597895 transitions. [2021-01-20 18:10:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-20 18:10:14,215 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 18:10:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:14,215 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=583, Invalid=1397, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 18:10:14,215 INFO L78 Accepts]: Start accepts. Automaton has 204171 states and 597895 transitions. Word has length 86 [2021-01-20 18:10:14,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:14,216 INFO L481 AbstractCegarLoop]: Abstraction has 204171 states and 597895 transitions. [2021-01-20 18:10:14,216 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 18:10:14,216 INFO L276 IsEmpty]: Start isEmpty. Operand 204171 states and 597895 transitions. [2021-01-20 18:10:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:10:14,565 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:14,566 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 18:10:14,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-01-20 18:10:14,778 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:14,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:14,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1357101873, now seen corresponding path program 60 times [2021-01-20 18:10:14,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:14,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955387070] [2021-01-20 18:10:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:15,060 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 18:10:15,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955387070] [2021-01-20 18:10:15,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832700891] [2021-01-20 18:10:15,061 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 18:10:15,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-20 18:10:15,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:15,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:10:15,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:15,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:10:15,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:15,231 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 18:10:15,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:15,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-20 18:10:15,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004068548] [2021-01-20 18:10:15,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:10:15,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:15,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:10:15,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:10:15,246 INFO L87 Difference]: Start difference. First operand 204171 states and 597895 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 18:10:17,360 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-01-20 18:10:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:17,985 INFO L93 Difference]: Finished difference Result 206411 states and 604487 transitions. [2021-01-20 18:10:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:10:17,986 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 18:10:17,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:17,987 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=692, Invalid=1758, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 18:10:17,987 INFO L78 Accepts]: Start accepts. Automaton has 206411 states and 604487 transitions. Word has length 86 [2021-01-20 18:10:17,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:17,987 INFO L481 AbstractCegarLoop]: Abstraction has 206411 states and 604487 transitions. [2021-01-20 18:10:17,987 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 18:10:17,988 INFO L276 IsEmpty]: Start isEmpty. Operand 206411 states and 604487 transitions. [2021-01-20 18:10:18,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:10:18,290 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:18,291 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 18:10:18,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:18,505 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:18,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:18,506 INFO L82 PathProgramCache]: Analyzing trace with hash 139163241, now seen corresponding path program 61 times [2021-01-20 18:10:18,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:18,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763046223] [2021-01-20 18:10:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:18,792 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 18:10:18,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763046223] [2021-01-20 18:10:18,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118651836] [2021-01-20 18:10:18,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:18,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:10:18,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:19,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:19,381 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 18:10:19,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:19,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:10:19,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647101165] [2021-01-20 18:10:19,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:10:19,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:19,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:10:19,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:10:19,384 INFO L87 Difference]: Start difference. First operand 206411 states and 604487 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 18:10:21,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:21,960 INFO L93 Difference]: Finished difference Result 208779 states and 611463 transitions. [2021-01-20 18:10:21,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 18:10:21,961 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 18:10:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:21,962 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=603, Invalid=1559, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 18:10:21,962 INFO L78 Accepts]: Start accepts. Automaton has 208779 states and 611463 transitions. Word has length 86 [2021-01-20 18:10:21,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:21,962 INFO L481 AbstractCegarLoop]: Abstraction has 208779 states and 611463 transitions. [2021-01-20 18:10:21,962 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 18:10:21,962 INFO L276 IsEmpty]: Start isEmpty. Operand 208779 states and 611463 transitions. [2021-01-20 18:10:22,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:10:22,284 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:22,284 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 18:10:22,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-01-20 18:10:22,497 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:22,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:22,498 INFO L82 PathProgramCache]: Analyzing trace with hash -454053575, now seen corresponding path program 62 times [2021-01-20 18:10:22,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:22,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668448983] [2021-01-20 18:10:22,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:22,831 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 18:10:22,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668448983] [2021-01-20 18:10:22,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521593273] [2021-01-20 18:10:22,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:22,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:10:22,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:22,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:10:22,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:23,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:10:23,100 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:23,129 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 18:10:23,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:23,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-20 18:10:23,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684633641] [2021-01-20 18:10:23,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:10:23,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:23,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:10:23,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:10:23,144 INFO L87 Difference]: Start difference. First operand 208779 states and 611463 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 18:10:26,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:26,010 INFO L93 Difference]: Finished difference Result 210891 states and 617671 transitions. [2021-01-20 18:10:26,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 18:10:26,010 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 18:10:26,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:26,011 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=720, Invalid=1932, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 18:10:26,011 INFO L78 Accepts]: Start accepts. Automaton has 210891 states and 617671 transitions. Word has length 86 [2021-01-20 18:10:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:26,012 INFO L481 AbstractCegarLoop]: Abstraction has 210891 states and 617671 transitions. [2021-01-20 18:10:26,012 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 18:10:26,012 INFO L276 IsEmpty]: Start isEmpty. Operand 210891 states and 617671 transitions. [2021-01-20 18:10:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:10:26,299 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:26,299 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 18:10:26,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-01-20 18:10:26,512 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:26,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:26,513 INFO L82 PathProgramCache]: Analyzing trace with hash -626739353, now seen corresponding path program 63 times [2021-01-20 18:10:26,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:26,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641937615] [2021-01-20 18:10:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:26,916 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 18:10:26,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641937615] [2021-01-20 18:10:26,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567647940] [2021-01-20 18:10:26,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:26,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-20 18:10:27,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:27,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:10:27,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:27,063 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:27,080 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 18:10:27,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:27,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:10:27,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854986979] [2021-01-20 18:10:27,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:10:27,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:27,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:10:27,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:10:27,082 INFO L87 Difference]: Start difference. First operand 210891 states and 617671 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 18:10:29,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:29,874 INFO L93 Difference]: Finished difference Result 213003 states and 623879 transitions. [2021-01-20 18:10:29,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 18:10:29,875 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 18:10:29,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:29,876 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=643, Invalid=1709, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 18:10:29,876 INFO L78 Accepts]: Start accepts. Automaton has 213003 states and 623879 transitions. Word has length 86 [2021-01-20 18:10:29,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:29,876 INFO L481 AbstractCegarLoop]: Abstraction has 213003 states and 623879 transitions. [2021-01-20 18:10:29,876 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 18:10:29,876 INFO L276 IsEmpty]: Start isEmpty. Operand 213003 states and 623879 transitions. [2021-01-20 18:10:30,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:10:30,153 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:30,153 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 18:10:30,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:30,368 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:30,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:30,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1534932535, now seen corresponding path program 64 times [2021-01-20 18:10:30,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:30,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45715300] [2021-01-20 18:10:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:30,798 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 18:10:30,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45715300] [2021-01-20 18:10:30,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146437256] [2021-01-20 18:10:30,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:30,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 18:10:30,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:30,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-20 18:10:30,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:30,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:10:30,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:30,936 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 18:10:30,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:30,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-20 18:10:30,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326564127] [2021-01-20 18:10:30,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:10:30,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:30,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:10:30,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:10:30,938 INFO L87 Difference]: Start difference. First operand 213003 states and 623879 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 18:10:33,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:33,940 INFO L93 Difference]: Finished difference Result 214859 states and 629319 transitions. [2021-01-20 18:10:33,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 18:10:33,941 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 18:10:33,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:33,941 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=768, Invalid=2094, Unknown=0, NotChecked=0, Total=2862 [2021-01-20 18:10:33,941 INFO L78 Accepts]: Start accepts. Automaton has 214859 states and 629319 transitions. Word has length 86 [2021-01-20 18:10:33,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:33,942 INFO L481 AbstractCegarLoop]: Abstraction has 214859 states and 629319 transitions. [2021-01-20 18:10:33,942 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 18:10:33,942 INFO L276 IsEmpty]: Start isEmpty. Operand 214859 states and 629319 transitions. [2021-01-20 18:10:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:10:34,174 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:34,175 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 18:10:34,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:34,389 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:34,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:34,391 INFO L82 PathProgramCache]: Analyzing trace with hash -869433883, now seen corresponding path program 65 times [2021-01-20 18:10:34,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:34,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059628271] [2021-01-20 18:10:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:34,593 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 18:10:34,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059628271] [2021-01-20 18:10:34,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730956064] [2021-01-20 18:10:34,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:34,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-20 18:10:34,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:34,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:10:34,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:34,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:34,782 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 18:10:34,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:34,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:10:34,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516319399] [2021-01-20 18:10:34,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:10:34,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:34,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:10:34,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:10:34,784 INFO L87 Difference]: Start difference. First operand 214859 states and 629319 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 18:10:36,076 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-01-20 18:10:37,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:37,804 INFO L93 Difference]: Finished difference Result 216843 states and 635143 transitions. [2021-01-20 18:10:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-20 18:10:37,805 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 18:10:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:37,805 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=703, Invalid=1847, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 18:10:37,806 INFO L78 Accepts]: Start accepts. Automaton has 216843 states and 635143 transitions. Word has length 86 [2021-01-20 18:10:37,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:37,806 INFO L481 AbstractCegarLoop]: Abstraction has 216843 states and 635143 transitions. [2021-01-20 18:10:37,806 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 18:10:37,806 INFO L276 IsEmpty]: Start isEmpty. Operand 216843 states and 635143 transitions. [2021-01-20 18:10:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:10:38,044 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:38,046 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 18:10:38,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-01-20 18:10:38,259 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:38,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:38,260 INFO L82 PathProgramCache]: Analyzing trace with hash 352272565, now seen corresponding path program 66 times [2021-01-20 18:10:38,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:38,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731912205] [2021-01-20 18:10:38,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:39,425 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 18:10:39,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731912205] [2021-01-20 18:10:39,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224121888] [2021-01-20 18:10:39,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:39,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-20 18:10:39,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:39,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:10:39,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:39,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:10:39,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:39,694 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 18:10:39,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:39,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-20 18:10:39,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339652691] [2021-01-20 18:10:39,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:10:39,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:39,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:10:39,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:10:39,708 INFO L87 Difference]: Start difference. First operand 216843 states and 635143 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 18:10:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:42,027 INFO L93 Difference]: Finished difference Result 218443 states and 639815 transitions. [2021-01-20 18:10:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 18:10:42,028 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 18:10:42,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:42,029 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=836, Invalid=2244, Unknown=0, NotChecked=0, Total=3080 [2021-01-20 18:10:42,029 INFO L78 Accepts]: Start accepts. Automaton has 218443 states and 639815 transitions. Word has length 86 [2021-01-20 18:10:42,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:42,029 INFO L481 AbstractCegarLoop]: Abstraction has 218443 states and 639815 transitions. [2021-01-20 18:10:42,029 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 18:10:42,029 INFO L276 IsEmpty]: Start isEmpty. Operand 218443 states and 639815 transitions. [2021-01-20 18:10:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:10:43,135 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:43,135 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 18:10:43,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:43,350 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:43,351 INFO L82 PathProgramCache]: Analyzing trace with hash -737760797, now seen corresponding path program 67 times [2021-01-20 18:10:43,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:43,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729373091] [2021-01-20 18:10:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:43,741 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 18:10:43,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729373091] [2021-01-20 18:10:43,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97355135] [2021-01-20 18:10:43,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:43,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:10:43,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:43,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:43,869 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 18:10:43,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:43,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:10:43,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984890863] [2021-01-20 18:10:43,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:10:43,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:43,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:10:43,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:10:43,871 INFO L87 Difference]: Start difference. First operand 218443 states and 639815 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 18:10:46,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:46,484 INFO L93 Difference]: Finished difference Result 220299 states and 645255 transitions. [2021-01-20 18:10:46,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 18:10:46,488 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 18:10:46,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:46,488 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=783, Invalid=1973, Unknown=0, NotChecked=0, Total=2756 [2021-01-20 18:10:46,488 INFO L78 Accepts]: Start accepts. Automaton has 220299 states and 645255 transitions. Word has length 86 [2021-01-20 18:10:46,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:46,489 INFO L481 AbstractCegarLoop]: Abstraction has 220299 states and 645255 transitions. [2021-01-20 18:10:46,489 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 18:10:46,489 INFO L276 IsEmpty]: Start isEmpty. Operand 220299 states and 645255 transitions. [2021-01-20 18:10:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:10:46,899 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:46,899 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 18:10:47,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-01-20 18:10:47,100 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:47,100 INFO L82 PathProgramCache]: Analyzing trace with hash 181842099, now seen corresponding path program 68 times [2021-01-20 18:10:47,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:47,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627561464] [2021-01-20 18:10:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:47,305 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 18:10:47,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627561464] [2021-01-20 18:10:47,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969446920] [2021-01-20 18:10:47,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:47,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 18:10:47,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:47,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:10:47,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:47,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 18:10:47,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:47,443 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 18:10:47,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:47,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-20 18:10:47,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417080909] [2021-01-20 18:10:47,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 18:10:47,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:47,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 18:10:47,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-01-20 18:10:47,445 INFO L87 Difference]: Start difference. First operand 220299 states and 645255 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 18:10:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 18:10:50,761 INFO L93 Difference]: Finished difference Result 223179 states and 653639 transitions. [2021-01-20 18:10:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-20 18:10:50,762 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 18:10:50,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 18:10:50,762 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=924, Invalid=2382, Unknown=0, NotChecked=0, Total=3306 [2021-01-20 18:10:50,763 INFO L78 Accepts]: Start accepts. Automaton has 223179 states and 653639 transitions. Word has length 86 [2021-01-20 18:10:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 18:10:50,763 INFO L481 AbstractCegarLoop]: Abstraction has 223179 states and 653639 transitions. [2021-01-20 18:10:50,763 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 18:10:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 223179 states and 653639 transitions. [2021-01-20 18:10:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-20 18:10:51,048 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 18:10:51,048 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 18:10:51,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:51,261 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 18:10:51,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 18:10:51,262 INFO L82 PathProgramCache]: Analyzing trace with hash 533918017, now seen corresponding path program 69 times [2021-01-20 18:10:51,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 18:10:51,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60444603] [2021-01-20 18:10:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 18:10:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 18:10:51,461 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 18:10:51,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60444603] [2021-01-20 18:10:51,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618228705] [2021-01-20 18:10:51,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 18:10:51,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-20 18:10:51,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 18:10:51,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-20 18:10:51,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 18:10:51,576 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 18:10:51,586 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 18:10:51,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 18:10:51,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-20 18:10:51,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124016071] [2021-01-20 18:10:51,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 18:10:51,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 18:10:51,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 18:10:51,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-01-20 18:10:51,589 INFO L87 Difference]: Start difference. First operand 223179 states and 653639 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)