/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:27:26,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:27:26,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:27:26,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:27:26,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:27:26,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:27:26,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:27:26,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:27:26,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:27:26,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:27:26,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:27:26,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:27:26,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:27:26,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:27:26,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:27:26,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:27:26,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:27:26,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:27:26,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:27:26,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:27:26,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:27:26,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:27:26,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:27:26,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:27:26,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 10:27:26,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 10:27:26,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 10:27:26,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 10:27:26,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 10:27:26,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 10:27:26,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:27:26,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:27:26,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:27:26,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:27:26,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:27:26,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:27:26,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:27:26,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:27:26,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:27:26,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:27:26,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:27:26,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:27:26,607 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:27:26,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:27:26,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:27:26,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:27:26,610 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:27:26,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:27:26,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:27:26,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:27:26,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:27:26,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:27:26,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:27:26,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:27:26,613 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:27:26,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:27:26,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:27:26,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:27:26,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:27:26,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:27:26,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:27:26,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:27:26,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:27:26,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:27:26,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:27:26,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:27:26,616 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:27:26,616 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:27:27,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:27:27,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:27:27,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:27:27,098 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:27:27,099 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:27:27,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_bench-1.i [2020-12-22 10:27:27,193 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e2925b84/57b7b213a428406dbd84670a9bd02e87/FLAG73f1c5d2d [2020-12-22 10:27:27,865 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:27:27,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench-1.i [2020-12-22 10:27:27,886 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e2925b84/57b7b213a428406dbd84670a9bd02e87/FLAG73f1c5d2d [2020-12-22 10:27:28,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e2925b84/57b7b213a428406dbd84670a9bd02e87 [2020-12-22 10:27:28,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:27:28,100 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:27:28,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:27:28,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:27:28,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:27:28,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:27:28" (1/1) ... [2020-12-22 10:27:28,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57284d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:28, skipping insertion in model container [2020-12-22 10:27:28,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:27:28" (1/1) ... [2020-12-22 10:27:28,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:27:28,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:27:28,587 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench-1.i[30920,30933] [2020-12-22 10:27:28,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:27:28,600 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:27:28,640 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench-1.i[30920,30933] [2020-12-22 10:27:28,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:27:28,742 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:27:28,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:28 WrapperNode [2020-12-22 10:27:28,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:27:28,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:27:28,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:27:28,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:27:28,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:28" (1/1) ... [2020-12-22 10:27:28,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:28" (1/1) ... [2020-12-22 10:27:28,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:27:28,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:27:28,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:27:28,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:27:28,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:28" (1/1) ... [2020-12-22 10:27:28,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:28" (1/1) ... [2020-12-22 10:27:28,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:28" (1/1) ... [2020-12-22 10:27:28,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:28" (1/1) ... [2020-12-22 10:27:28,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:28" (1/1) ... [2020-12-22 10:27:28,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:28" (1/1) ... [2020-12-22 10:27:28,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:28" (1/1) ... [2020-12-22 10:27:28,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:27:28,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:27:28,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:27:28,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:27:28,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:27:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-22 10:27:29,026 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-22 10:27:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-22 10:27:29,027 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-22 10:27:29,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 10:27:29,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-22 10:27:29,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:27:29,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 10:27:29,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:27:29,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-22 10:27:29,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:27:29,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:27:29,033 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-22 10:27:29,442 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:27:29,443 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-22 10:27:29,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:27:29 BoogieIcfgContainer [2020-12-22 10:27:29,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:27:29,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:27:29,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:27:29,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:27:29,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:27:28" (1/3) ... [2020-12-22 10:27:29,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff7c985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:27:29, skipping insertion in model container [2020-12-22 10:27:29,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:28" (2/3) ... [2020-12-22 10:27:29,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff7c985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:27:29, skipping insertion in model container [2020-12-22 10:27:29,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:27:29" (3/3) ... [2020-12-22 10:27:29,458 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2020-12-22 10:27:29,470 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-22 10:27:29,470 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:27:29,475 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 10:27:29,476 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-22 10:27:29,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,529 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,529 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,529 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,532 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,532 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,533 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,533 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,534 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,534 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,534 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,535 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,536 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,536 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,537 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,537 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,538 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,538 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,538 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,538 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,538 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,539 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,539 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,539 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,539 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,540 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,540 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,540 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,542 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,542 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,542 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,542 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,543 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,543 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,543 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,543 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,543 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,544 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,544 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,545 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,545 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,545 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,545 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,545 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,546 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,546 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,546 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,546 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,547 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,547 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,547 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,547 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,547 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,548 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,548 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,548 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,555 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,555 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,555 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,556 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,562 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,562 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,562 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,563 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,563 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,563 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:27:29,567 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-22 10:27:29,589 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 10:27:29,630 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:27:29,630 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:27:29,631 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:27:29,631 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:27:29,631 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:27:29,631 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:27:29,631 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:27:29,631 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:27:29,650 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-22 10:27:29,660 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 62 transitions, 134 flow [2020-12-22 10:27:29,664 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 62 transitions, 134 flow [2020-12-22 10:27:29,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 64 places, 62 transitions, 134 flow [2020-12-22 10:27:29,744 INFO L129 PetriNetUnfolder]: 5/60 cut-off events. [2020-12-22 10:27:29,745 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-22 10:27:29,755 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 60 events. 5/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2020-12-22 10:27:29,761 INFO L116 LiptonReduction]: Number of co-enabled transitions 1080 [2020-12-22 10:27:31,766 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:27:32,300 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-12-22 10:27:32,437 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 10:27:32,687 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-12-22 10:27:32,800 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 10:27:32,802 INFO L131 LiptonReduction]: Checked pairs total: 1025 [2020-12-22 10:27:32,803 INFO L133 LiptonReduction]: Total number of compositions: 55 [2020-12-22 10:27:32,809 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-12-22 10:27:32,818 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-12-22 10:27:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-22 10:27:32,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 10:27:32,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:32,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 10:27:32,826 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:32,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:32,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1040872604, now seen corresponding path program 1 times [2020-12-22 10:27:32,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:32,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477376755] [2020-12-22 10:27:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:33,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477376755] [2020-12-22 10:27:33,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:33,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:27:33,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690781794] [2020-12-22 10:27:33,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:27:33,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:33,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:27:33,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:27:33,116 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-12-22 10:27:33,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:33,184 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-12-22 10:27:33,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:27:33,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 10:27:33,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:33,198 INFO L225 Difference]: With dead ends: 83 [2020-12-22 10:27:33,199 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 10:27:33,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:27:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 10:27:33,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-12-22 10:27:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 10:27:33,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-12-22 10:27:33,246 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-12-22 10:27:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:33,247 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-12-22 10:27:33,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:27:33,247 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-12-22 10:27:33,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 10:27:33,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:33,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:33,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:27:33,249 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:33,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:33,250 INFO L82 PathProgramCache]: Analyzing trace with hash 947244113, now seen corresponding path program 1 times [2020-12-22 10:27:33,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:33,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929509767] [2020-12-22 10:27:33,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:33,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929509767] [2020-12-22 10:27:33,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:33,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:27:33,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679491673] [2020-12-22 10:27:33,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:27:33,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:33,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:27:33,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:27:33,391 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-12-22 10:27:33,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:33,444 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-12-22 10:27:33,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:27:33,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 10:27:33,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:33,449 INFO L225 Difference]: With dead ends: 80 [2020-12-22 10:27:33,449 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 10:27:33,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:27:33,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 10:27:33,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-12-22 10:27:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 10:27:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-12-22 10:27:33,462 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-12-22 10:27:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:33,463 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-12-22 10:27:33,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:27:33,463 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-12-22 10:27:33,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 10:27:33,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:33,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:33,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:27:33,465 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:33,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:33,465 INFO L82 PathProgramCache]: Analyzing trace with hash 448812566, now seen corresponding path program 1 times [2020-12-22 10:27:33,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:33,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262252387] [2020-12-22 10:27:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:33,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262252387] [2020-12-22 10:27:33,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:33,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:27:33,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187002443] [2020-12-22 10:27:33,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:27:33,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:33,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:27:33,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:27:33,561 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-12-22 10:27:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:33,591 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-12-22 10:27:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:27:33,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 10:27:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:33,593 INFO L225 Difference]: With dead ends: 73 [2020-12-22 10:27:33,593 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 10:27:33,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:27:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 10:27:33,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-12-22 10:27:33,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 10:27:33,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-12-22 10:27:33,604 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-12-22 10:27:33,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:33,605 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-12-22 10:27:33,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:27:33,605 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-12-22 10:27:33,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 10:27:33,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:33,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:33,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:27:33,607 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:33,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:33,608 INFO L82 PathProgramCache]: Analyzing trace with hash 449093426, now seen corresponding path program 2 times [2020-12-22 10:27:33,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:33,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086521148] [2020-12-22 10:27:33,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:33,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086521148] [2020-12-22 10:27:33,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:33,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:27:33,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232667063] [2020-12-22 10:27:33,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:27:33,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:33,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:27:33,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:27:33,686 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-12-22 10:27:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:33,752 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-12-22 10:27:33,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:27:33,752 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 10:27:33,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:33,754 INFO L225 Difference]: With dead ends: 86 [2020-12-22 10:27:33,754 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 10:27:33,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:27:33,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 10:27:33,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-12-22 10:27:33,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 10:27:33,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-12-22 10:27:33,767 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-12-22 10:27:33,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:33,767 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-12-22 10:27:33,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:27:33,767 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-12-22 10:27:33,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 10:27:33,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:33,769 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:33,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:27:33,770 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:33,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:33,771 INFO L82 PathProgramCache]: Analyzing trace with hash -672996833, now seen corresponding path program 2 times [2020-12-22 10:27:33,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:33,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084898222] [2020-12-22 10:27:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:33,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084898222] [2020-12-22 10:27:33,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450687724] [2020-12-22 10:27:33,904 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:34,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:27:34,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:34,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:27:34,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:34,212 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:27:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:34,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:34,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-12-22 10:27:34,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442716325] [2020-12-22 10:27:34,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:34,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:34,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:34,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:34,269 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-12-22 10:27:34,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:34,442 INFO L93 Difference]: Finished difference Result 121 states and 281 transitions. [2020-12-22 10:27:34,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:27:34,448 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-12-22 10:27:34,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:34,450 INFO L225 Difference]: With dead ends: 121 [2020-12-22 10:27:34,450 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 10:27:34,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:27:34,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 10:27:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 76. [2020-12-22 10:27:34,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 10:27:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-12-22 10:27:34,473 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 9 [2020-12-22 10:27:34,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:34,474 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-12-22 10:27:34,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:27:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-12-22 10:27:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 10:27:34,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:34,475 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:34,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:34,682 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:34,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:34,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1028288236, now seen corresponding path program 3 times [2020-12-22 10:27:34,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:34,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780933787] [2020-12-22 10:27:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:34,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780933787] [2020-12-22 10:27:34,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093637957] [2020-12-22 10:27:34,777 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:34,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:27:34,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:34,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:27:34,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:34,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:34,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-22 10:27:34,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161688048] [2020-12-22 10:27:34,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:27:34,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:34,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:27:34,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:27:34,936 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 9 states. [2020-12-22 10:27:34,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:34,997 INFO L93 Difference]: Finished difference Result 89 states and 215 transitions. [2020-12-22 10:27:34,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:27:34,997 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-22 10:27:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:35,001 INFO L225 Difference]: With dead ends: 89 [2020-12-22 10:27:35,001 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 10:27:35,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:27:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 10:27:35,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2020-12-22 10:27:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 10:27:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-12-22 10:27:35,031 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 9 [2020-12-22 10:27:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:35,032 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-12-22 10:27:35,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:27:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-12-22 10:27:35,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 10:27:35,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:35,033 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:35,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:35,234 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:35,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:35,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1036994896, now seen corresponding path program 4 times [2020-12-22 10:27:35,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:35,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068368599] [2020-12-22 10:27:35,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:35,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068368599] [2020-12-22 10:27:35,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623072362] [2020-12-22 10:27:35,342 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:35,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:27:35,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:35,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:27:35,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:35,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:35,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-22 10:27:35,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641691640] [2020-12-22 10:27:35,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:27:35,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:35,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:27:35,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:27:35,521 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 9 states. [2020-12-22 10:27:35,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:35,591 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-12-22 10:27:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:27:35,592 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-22 10:27:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:35,594 INFO L225 Difference]: With dead ends: 95 [2020-12-22 10:27:35,594 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 10:27:35,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:35,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 10:27:35,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-12-22 10:27:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 10:27:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 202 transitions. [2020-12-22 10:27:35,617 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 202 transitions. Word has length 9 [2020-12-22 10:27:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:35,617 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 202 transitions. [2020-12-22 10:27:35,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:27:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 202 transitions. [2020-12-22 10:27:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 10:27:35,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:35,650 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:35,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:35,851 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:35,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:35,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1037016286, now seen corresponding path program 5 times [2020-12-22 10:27:35,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:35,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955991372] [2020-12-22 10:27:35,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:35,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955991372] [2020-12-22 10:27:35,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909602347] [2020-12-22 10:27:35,973 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:36,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:27:36,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:36,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:27:36,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:36,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:36,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-12-22 10:27:36,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138021772] [2020-12-22 10:27:36,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:36,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:36,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:36,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:36,152 INFO L87 Difference]: Start difference. First operand 81 states and 202 transitions. Second operand 10 states. [2020-12-22 10:27:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:36,322 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-12-22 10:27:36,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:27:36,323 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-12-22 10:27:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:36,324 INFO L225 Difference]: With dead ends: 120 [2020-12-22 10:27:36,324 INFO L226 Difference]: Without dead ends: 108 [2020-12-22 10:27:36,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:27:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-22 10:27:36,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2020-12-22 10:27:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 10:27:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-12-22 10:27:36,331 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 9 [2020-12-22 10:27:36,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:36,331 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-12-22 10:27:36,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:27:36,331 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-12-22 10:27:36,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:27:36,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:36,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:36,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:36,546 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:36,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:36,547 INFO L82 PathProgramCache]: Analyzing trace with hash -231469117, now seen corresponding path program 1 times [2020-12-22 10:27:36,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:36,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440304808] [2020-12-22 10:27:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:36,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440304808] [2020-12-22 10:27:36,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:36,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:27:36,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403275653] [2020-12-22 10:27:36,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:27:36,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:36,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:27:36,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:27:36,660 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 6 states. [2020-12-22 10:27:36,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:36,708 INFO L93 Difference]: Finished difference Result 107 states and 259 transitions. [2020-12-22 10:27:36,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:27:36,709 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 10:27:36,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:36,710 INFO L225 Difference]: With dead ends: 107 [2020-12-22 10:27:36,710 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 10:27:36,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:27:36,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 10:27:36,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2020-12-22 10:27:36,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 10:27:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 233 transitions. [2020-12-22 10:27:36,726 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 233 transitions. Word has length 10 [2020-12-22 10:27:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:36,726 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 233 transitions. [2020-12-22 10:27:36,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:27:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 233 transitions. [2020-12-22 10:27:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:27:36,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:36,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:36,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:27:36,732 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:36,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:36,735 INFO L82 PathProgramCache]: Analyzing trace with hash -231188257, now seen corresponding path program 2 times [2020-12-22 10:27:36,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:36,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850614611] [2020-12-22 10:27:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:36,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850614611] [2020-12-22 10:27:36,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:36,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:27:36,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986904876] [2020-12-22 10:27:36,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:27:36,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:36,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:27:36,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:27:36,843 INFO L87 Difference]: Start difference. First operand 94 states and 233 transitions. Second operand 6 states. [2020-12-22 10:27:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:36,922 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-12-22 10:27:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:27:36,923 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 10:27:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:36,924 INFO L225 Difference]: With dead ends: 122 [2020-12-22 10:27:36,924 INFO L226 Difference]: Without dead ends: 117 [2020-12-22 10:27:36,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:27:36,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-22 10:27:36,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 93. [2020-12-22 10:27:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 10:27:36,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 231 transitions. [2020-12-22 10:27:36,929 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 231 transitions. Word has length 10 [2020-12-22 10:27:36,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:36,930 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 231 transitions. [2020-12-22 10:27:36,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:27:36,930 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 231 transitions. [2020-12-22 10:27:36,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:27:36,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:36,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:36,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:27:36,931 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:36,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:36,931 INFO L82 PathProgramCache]: Analyzing trace with hash -598460671, now seen corresponding path program 3 times [2020-12-22 10:27:36,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:36,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264825224] [2020-12-22 10:27:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:37,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264825224] [2020-12-22 10:27:37,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:37,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:27:37,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957014678] [2020-12-22 10:27:37,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:27:37,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:37,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:27:37,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:27:37,002 INFO L87 Difference]: Start difference. First operand 93 states and 231 transitions. Second operand 6 states. [2020-12-22 10:27:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:37,077 INFO L93 Difference]: Finished difference Result 115 states and 275 transitions. [2020-12-22 10:27:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:27:37,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 10:27:37,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:37,079 INFO L225 Difference]: With dead ends: 115 [2020-12-22 10:27:37,079 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 10:27:37,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:27:37,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 10:27:37,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2020-12-22 10:27:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 10:27:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-12-22 10:27:37,084 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-12-22 10:27:37,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:37,085 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-12-22 10:27:37,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:27:37,085 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-12-22 10:27:37,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:27:37,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:37,085 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:37,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:27:37,086 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:37,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1634246561, now seen corresponding path program 3 times [2020-12-22 10:27:37,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:37,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735074316] [2020-12-22 10:27:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:37,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735074316] [2020-12-22 10:27:37,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101744927] [2020-12-22 10:27:37,201 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:37,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:27:37,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:37,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:37,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:37,365 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:27:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:37,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:37,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:27:37,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864772407] [2020-12-22 10:27:37,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:27:37,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:37,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:27:37,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:27:37,388 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 14 states. [2020-12-22 10:27:37,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:37,537 INFO L93 Difference]: Finished difference Result 161 states and 377 transitions. [2020-12-22 10:27:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:27:37,538 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-22 10:27:37,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:37,540 INFO L225 Difference]: With dead ends: 161 [2020-12-22 10:27:37,540 INFO L226 Difference]: Without dead ends: 153 [2020-12-22 10:27:37,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:27:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-22 10:27:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2020-12-22 10:27:37,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 10:27:37,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 264 transitions. [2020-12-22 10:27:37,546 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 264 transitions. Word has length 11 [2020-12-22 10:27:37,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:37,546 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 264 transitions. [2020-12-22 10:27:37,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:27:37,546 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 264 transitions. [2020-12-22 10:27:37,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:27:37,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:37,547 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:37,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 10:27:37,761 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:37,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:37,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1790110225, now seen corresponding path program 4 times [2020-12-22 10:27:37,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:37,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021225789] [2020-12-22 10:27:37,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:37,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021225789] [2020-12-22 10:27:37,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010585224] [2020-12-22 10:27:37,843 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:37,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:27:37,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:37,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:27:37,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:38,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:38,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-22 10:27:38,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55310935] [2020-12-22 10:27:38,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:27:38,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:38,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:27:38,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:27:38,014 INFO L87 Difference]: Start difference. First operand 104 states and 264 transitions. Second operand 12 states. [2020-12-22 10:27:38,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:38,100 INFO L93 Difference]: Finished difference Result 126 states and 306 transitions. [2020-12-22 10:27:38,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:27:38,100 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-12-22 10:27:38,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:38,101 INFO L225 Difference]: With dead ends: 126 [2020-12-22 10:27:38,101 INFO L226 Difference]: Without dead ends: 124 [2020-12-22 10:27:38,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:27:38,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-22 10:27:38,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2020-12-22 10:27:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 10:27:38,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 276 transitions. [2020-12-22 10:27:38,106 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 276 transitions. Word has length 11 [2020-12-22 10:27:38,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:38,107 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 276 transitions. [2020-12-22 10:27:38,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:27:38,107 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 276 transitions. [2020-12-22 10:27:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:27:38,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:38,108 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:38,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:38,323 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:38,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:38,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1790391085, now seen corresponding path program 5 times [2020-12-22 10:27:38,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:38,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146975100] [2020-12-22 10:27:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:38,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146975100] [2020-12-22 10:27:38,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346175531] [2020-12-22 10:27:38,395 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:38,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:27:38,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:38,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:27:38,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:38,587 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:27:38,591 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:27:38,595 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:27:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:38,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:38,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:27:38,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019870495] [2020-12-22 10:27:38,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:27:38,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:38,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:27:38,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:27:38,611 INFO L87 Difference]: Start difference. First operand 110 states and 276 transitions. Second operand 11 states. [2020-12-22 10:27:38,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:38,828 INFO L93 Difference]: Finished difference Result 155 states and 373 transitions. [2020-12-22 10:27:38,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:27:38,829 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:27:38,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:38,831 INFO L225 Difference]: With dead ends: 155 [2020-12-22 10:27:38,831 INFO L226 Difference]: Without dead ends: 147 [2020-12-22 10:27:38,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:27:38,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-22 10:27:38,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 106. [2020-12-22 10:27:38,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 10:27:38,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 270 transitions. [2020-12-22 10:27:38,836 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 270 transitions. Word has length 11 [2020-12-22 10:27:38,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:38,837 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 270 transitions. [2020-12-22 10:27:38,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:27:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 270 transitions. [2020-12-22 10:27:38,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:27:38,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:38,838 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:39,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 10:27:39,052 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:39,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:39,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1414392543, now seen corresponding path program 6 times [2020-12-22 10:27:39,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:39,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330503135] [2020-12-22 10:27:39,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:39,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330503135] [2020-12-22 10:27:39,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721253210] [2020-12-22 10:27:39,150 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:39,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:27:39,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:39,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:27:39,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:39,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:39,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-22 10:27:39,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860204496] [2020-12-22 10:27:39,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:27:39,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:39,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:27:39,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:27:39,320 INFO L87 Difference]: Start difference. First operand 106 states and 270 transitions. Second operand 12 states. [2020-12-22 10:27:39,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:39,427 INFO L93 Difference]: Finished difference Result 136 states and 326 transitions. [2020-12-22 10:27:39,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:27:39,428 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-12-22 10:27:39,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:39,429 INFO L225 Difference]: With dead ends: 136 [2020-12-22 10:27:39,429 INFO L226 Difference]: Without dead ends: 134 [2020-12-22 10:27:39,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:27:39,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-22 10:27:39,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2020-12-22 10:27:39,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-22 10:27:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 277 transitions. [2020-12-22 10:27:39,435 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 277 transitions. Word has length 11 [2020-12-22 10:27:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:39,436 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 277 transitions. [2020-12-22 10:27:39,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:27:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 277 transitions. [2020-12-22 10:27:39,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:27:39,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:39,436 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:39,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 10:27:39,646 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:39,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:39,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1423099203, now seen corresponding path program 7 times [2020-12-22 10:27:39,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:39,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994206245] [2020-12-22 10:27:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:39,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994206245] [2020-12-22 10:27:39,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036439] [2020-12-22 10:27:39,768 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:39,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:27:39,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:39,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:39,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-22 10:27:39,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132574034] [2020-12-22 10:27:39,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:27:39,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:39,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:27:39,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:27:39,985 INFO L87 Difference]: Start difference. First operand 111 states and 277 transitions. Second operand 12 states. [2020-12-22 10:27:40,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:40,136 INFO L93 Difference]: Finished difference Result 137 states and 330 transitions. [2020-12-22 10:27:40,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:27:40,137 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-12-22 10:27:40,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:40,138 INFO L225 Difference]: With dead ends: 137 [2020-12-22 10:27:40,138 INFO L226 Difference]: Without dead ends: 135 [2020-12-22 10:27:40,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:27:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-22 10:27:40,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2020-12-22 10:27:40,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-22 10:27:40,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 284 transitions. [2020-12-22 10:27:40,145 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 284 transitions. Word has length 11 [2020-12-22 10:27:40,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:40,146 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 284 transitions. [2020-12-22 10:27:40,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:27:40,146 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 284 transitions. [2020-12-22 10:27:40,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:27:40,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:40,147 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:40,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 10:27:40,362 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:40,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:40,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1423120593, now seen corresponding path program 8 times [2020-12-22 10:27:40,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:40,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706431995] [2020-12-22 10:27:40,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:40,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706431995] [2020-12-22 10:27:40,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196586586] [2020-12-22 10:27:40,445 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:40,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:27:40,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:40,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:27:40,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:40,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:40,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:27:40,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031511969] [2020-12-22 10:27:40,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:27:40,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:40,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:27:40,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:27:40,608 INFO L87 Difference]: Start difference. First operand 113 states and 284 transitions. Second operand 11 states. [2020-12-22 10:27:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:40,831 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-12-22 10:27:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:27:40,832 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:27:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:40,833 INFO L225 Difference]: With dead ends: 160 [2020-12-22 10:27:40,833 INFO L226 Difference]: Without dead ends: 152 [2020-12-22 10:27:40,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:27:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-22 10:27:40,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 111. [2020-12-22 10:27:40,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-22 10:27:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 280 transitions. [2020-12-22 10:27:40,838 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 280 transitions. Word has length 11 [2020-12-22 10:27:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:40,839 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 280 transitions. [2020-12-22 10:27:40,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:27:40,839 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 280 transitions. [2020-12-22 10:27:40,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:27:40,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:40,840 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:41,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 10:27:41,055 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:41,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:41,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1642922929, now seen corresponding path program 9 times [2020-12-22 10:27:41,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:41,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379342683] [2020-12-22 10:27:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:41,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379342683] [2020-12-22 10:27:41,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668557334] [2020-12-22 10:27:41,130 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:41,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:27:41,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:41,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:27:41,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:41,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:41,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-22 10:27:41,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476323437] [2020-12-22 10:27:41,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:27:41,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:41,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:27:41,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:27:41,276 INFO L87 Difference]: Start difference. First operand 111 states and 280 transitions. Second operand 12 states. [2020-12-22 10:27:41,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:41,349 INFO L93 Difference]: Finished difference Result 136 states and 330 transitions. [2020-12-22 10:27:41,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:27:41,350 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-12-22 10:27:41,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:41,351 INFO L225 Difference]: With dead ends: 136 [2020-12-22 10:27:41,352 INFO L226 Difference]: Without dead ends: 134 [2020-12-22 10:27:41,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:27:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-22 10:27:41,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 112. [2020-12-22 10:27:41,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 10:27:41,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 282 transitions. [2020-12-22 10:27:41,357 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 282 transitions. Word has length 11 [2020-12-22 10:27:41,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:41,358 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 282 transitions. [2020-12-22 10:27:41,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:27:41,358 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 282 transitions. [2020-12-22 10:27:41,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:27:41,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:41,358 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:41,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 10:27:41,572 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:41,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:41,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1373016469, now seen corresponding path program 10 times [2020-12-22 10:27:41,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:41,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520307830] [2020-12-22 10:27:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:41,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520307830] [2020-12-22 10:27:41,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391856155] [2020-12-22 10:27:41,639 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:41,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:27:41,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:41,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:27:41,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:41,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:41,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-22 10:27:41,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294817180] [2020-12-22 10:27:41,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:27:41,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:41,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:27:41,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:27:41,806 INFO L87 Difference]: Start difference. First operand 112 states and 282 transitions. Second operand 12 states. [2020-12-22 10:27:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:41,908 INFO L93 Difference]: Finished difference Result 142 states and 339 transitions. [2020-12-22 10:27:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:27:41,909 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-12-22 10:27:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:41,910 INFO L225 Difference]: With dead ends: 142 [2020-12-22 10:27:41,910 INFO L226 Difference]: Without dead ends: 140 [2020-12-22 10:27:41,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:27:41,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-22 10:27:41,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-12-22 10:27:41,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 10:27:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 277 transitions. [2020-12-22 10:27:41,914 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 277 transitions. Word has length 11 [2020-12-22 10:27:41,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:41,914 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 277 transitions. [2020-12-22 10:27:41,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:27:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 277 transitions. [2020-12-22 10:27:41,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:27:41,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:41,915 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:42,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:42,129 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:42,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:42,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1372411039, now seen corresponding path program 11 times [2020-12-22 10:27:42,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:42,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627835787] [2020-12-22 10:27:42,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:42,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627835787] [2020-12-22 10:27:42,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956196649] [2020-12-22 10:27:42,211 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:42,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:27:42,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:42,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:27:42,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:42,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:42,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-22 10:27:42,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388788228] [2020-12-22 10:27:42,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:27:42,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:42,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:27:42,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:27:42,374 INFO L87 Difference]: Start difference. First operand 110 states and 277 transitions. Second operand 12 states. [2020-12-22 10:27:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:42,492 INFO L93 Difference]: Finished difference Result 142 states and 340 transitions. [2020-12-22 10:27:42,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:27:42,492 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-12-22 10:27:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:42,494 INFO L225 Difference]: With dead ends: 142 [2020-12-22 10:27:42,494 INFO L226 Difference]: Without dead ends: 140 [2020-12-22 10:27:42,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:27:42,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-22 10:27:42,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 112. [2020-12-22 10:27:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 10:27:42,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 284 transitions. [2020-12-22 10:27:42,499 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 284 transitions. Word has length 11 [2020-12-22 10:27:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:42,499 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 284 transitions. [2020-12-22 10:27:42,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:27:42,499 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 284 transitions. [2020-12-22 10:27:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:27:42,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:42,500 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:42,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-12-22 10:27:42,715 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:42,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:42,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1372391571, now seen corresponding path program 12 times [2020-12-22 10:27:42,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:42,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697153540] [2020-12-22 10:27:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:42,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697153540] [2020-12-22 10:27:42,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52806047] [2020-12-22 10:27:42,801 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:42,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:27:42,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:42,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:27:42,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:42,964 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:27:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:42,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:42,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:27:42,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382598977] [2020-12-22 10:27:42,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:27:42,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:42,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:27:42,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:27:42,978 INFO L87 Difference]: Start difference. First operand 112 states and 284 transitions. Second operand 11 states. [2020-12-22 10:27:43,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:43,136 INFO L93 Difference]: Finished difference Result 157 states and 377 transitions. [2020-12-22 10:27:43,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:27:43,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:27:43,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:43,138 INFO L225 Difference]: With dead ends: 157 [2020-12-22 10:27:43,138 INFO L226 Difference]: Without dead ends: 149 [2020-12-22 10:27:43,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:27:43,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-22 10:27:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 113. [2020-12-22 10:27:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-22 10:27:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 285 transitions. [2020-12-22 10:27:43,143 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 285 transitions. Word has length 11 [2020-12-22 10:27:43,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:43,143 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 285 transitions. [2020-12-22 10:27:43,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:27:43,143 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 285 transitions. [2020-12-22 10:27:43,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:27:43,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:43,144 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:43,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:43,360 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:43,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:43,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1372389649, now seen corresponding path program 13 times [2020-12-22 10:27:43,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:43,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320522282] [2020-12-22 10:27:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:43,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320522282] [2020-12-22 10:27:43,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144228658] [2020-12-22 10:27:43,450 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:43,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:27:43,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:43,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:43,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:27:43,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638542783] [2020-12-22 10:27:43,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:27:43,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:43,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:27:43,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:27:43,591 INFO L87 Difference]: Start difference. First operand 113 states and 285 transitions. Second operand 11 states. [2020-12-22 10:27:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:43,823 INFO L93 Difference]: Finished difference Result 161 states and 389 transitions. [2020-12-22 10:27:43,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:27:43,824 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:27:43,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:43,825 INFO L225 Difference]: With dead ends: 161 [2020-12-22 10:27:43,825 INFO L226 Difference]: Without dead ends: 153 [2020-12-22 10:27:43,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:27:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-22 10:27:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2020-12-22 10:27:43,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 10:27:43,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 283 transitions. [2020-12-22 10:27:43,830 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 283 transitions. Word has length 11 [2020-12-22 10:27:43,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:43,831 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 283 transitions. [2020-12-22 10:27:43,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:27:43,831 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 283 transitions. [2020-12-22 10:27:43,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:27:43,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:43,832 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:44,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 10:27:44,045 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:44,046 INFO L82 PathProgramCache]: Analyzing trace with hash 342535212, now seen corresponding path program 6 times [2020-12-22 10:27:44,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:44,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637668396] [2020-12-22 10:27:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:44,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637668396] [2020-12-22 10:27:44,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273433778] [2020-12-22 10:27:44,131 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:44,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:27:44,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:44,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:44,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:44,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:44,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:27:44,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547508866] [2020-12-22 10:27:44,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:27:44,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:44,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:27:44,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:27:44,321 INFO L87 Difference]: Start difference. First operand 112 states and 283 transitions. Second operand 14 states. [2020-12-22 10:27:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:44,367 INFO L93 Difference]: Finished difference Result 139 states and 337 transitions. [2020-12-22 10:27:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:27:44,367 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-22 10:27:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:44,369 INFO L225 Difference]: With dead ends: 139 [2020-12-22 10:27:44,369 INFO L226 Difference]: Without dead ends: 136 [2020-12-22 10:27:44,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:27:44,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-22 10:27:44,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-12-22 10:27:44,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 10:27:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-12-22 10:27:44,374 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 11 [2020-12-22 10:27:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:44,374 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-12-22 10:27:44,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:27:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-12-22 10:27:44,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:27:44,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:44,375 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:44,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:44,588 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:44,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:44,589 INFO L82 PathProgramCache]: Analyzing trace with hash 119700880, now seen corresponding path program 7 times [2020-12-22 10:27:44,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:44,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89173029] [2020-12-22 10:27:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:44,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89173029] [2020-12-22 10:27:44,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478781911] [2020-12-22 10:27:44,667 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:44,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:44,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:44,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:44,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:27:44,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761495923] [2020-12-22 10:27:44,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:27:44,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:44,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:27:44,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:27:44,860 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 14 states. [2020-12-22 10:27:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:44,923 INFO L93 Difference]: Finished difference Result 150 states and 358 transitions. [2020-12-22 10:27:44,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:27:44,923 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-22 10:27:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:44,924 INFO L225 Difference]: With dead ends: 150 [2020-12-22 10:27:44,924 INFO L226 Difference]: Without dead ends: 147 [2020-12-22 10:27:44,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:27:44,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-22 10:27:44,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 117. [2020-12-22 10:27:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 10:27:44,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-12-22 10:27:44,929 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 11 [2020-12-22 10:27:44,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:44,929 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-12-22 10:27:44,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:27:44,930 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-12-22 10:27:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:27:44,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:44,930 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:45,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:27:45,146 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:45,147 INFO L82 PathProgramCache]: Analyzing trace with hash 140256670, now seen corresponding path program 8 times [2020-12-22 10:27:45,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:45,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226218886] [2020-12-22 10:27:45,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:45,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226218886] [2020-12-22 10:27:45,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823877203] [2020-12-22 10:27:45,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:45,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:27:45,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:45,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:27:45,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:45,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:45,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:27:45,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208304898] [2020-12-22 10:27:45,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:27:45,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:45,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:27:45,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:27:45,407 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 14 states. [2020-12-22 10:27:45,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:45,498 INFO L93 Difference]: Finished difference Result 148 states and 353 transitions. [2020-12-22 10:27:45,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:27:45,498 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-22 10:27:45,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:45,500 INFO L225 Difference]: With dead ends: 148 [2020-12-22 10:27:45,500 INFO L226 Difference]: Without dead ends: 145 [2020-12-22 10:27:45,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:27:45,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-22 10:27:45,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 118. [2020-12-22 10:27:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-22 10:27:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 296 transitions. [2020-12-22 10:27:45,505 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 296 transitions. Word has length 11 [2020-12-22 10:27:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:45,505 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 296 transitions. [2020-12-22 10:27:45,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:27:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 296 transitions. [2020-12-22 10:27:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:27:45,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:45,506 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:45,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:27:45,720 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:45,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:45,721 INFO L82 PathProgramCache]: Analyzing trace with hash 140919760, now seen corresponding path program 9 times [2020-12-22 10:27:45,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:45,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92794937] [2020-12-22 10:27:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:45,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92794937] [2020-12-22 10:27:45,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413592138] [2020-12-22 10:27:45,817 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:45,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:27:45,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:45,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:27:45,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:45,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:45,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:27:45,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405041163] [2020-12-22 10:27:45,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:27:45,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:45,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:27:45,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:27:45,993 INFO L87 Difference]: Start difference. First operand 118 states and 296 transitions. Second operand 14 states. [2020-12-22 10:27:46,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:46,125 INFO L93 Difference]: Finished difference Result 147 states and 353 transitions. [2020-12-22 10:27:46,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:27:46,126 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-22 10:27:46,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:46,127 INFO L225 Difference]: With dead ends: 147 [2020-12-22 10:27:46,127 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 10:27:46,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:27:46,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 10:27:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 120. [2020-12-22 10:27:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-22 10:27:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 303 transitions. [2020-12-22 10:27:46,132 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 303 transitions. Word has length 11 [2020-12-22 10:27:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:46,133 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 303 transitions. [2020-12-22 10:27:46,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:27:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 303 transitions. [2020-12-22 10:27:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:27:46,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:46,133 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:46,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 10:27:46,349 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:46,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:46,349 INFO L82 PathProgramCache]: Analyzing trace with hash 140941150, now seen corresponding path program 10 times [2020-12-22 10:27:46,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:46,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354439834] [2020-12-22 10:27:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:46,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354439834] [2020-12-22 10:27:46,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134495365] [2020-12-22 10:27:46,441 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:46,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:27:46,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:46,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:46,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:46,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:46,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:27:46,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516028556] [2020-12-22 10:27:46,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:27:46,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:46,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:27:46,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:27:46,690 INFO L87 Difference]: Start difference. First operand 120 states and 303 transitions. Second operand 14 states. [2020-12-22 10:27:46,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:46,935 INFO L93 Difference]: Finished difference Result 172 states and 415 transitions. [2020-12-22 10:27:46,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:27:46,935 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-22 10:27:46,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:46,936 INFO L225 Difference]: With dead ends: 172 [2020-12-22 10:27:46,936 INFO L226 Difference]: Without dead ends: 160 [2020-12-22 10:27:46,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:27:46,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-22 10:27:46,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 125. [2020-12-22 10:27:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-22 10:27:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 320 transitions. [2020-12-22 10:27:46,943 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 320 transitions. Word has length 11 [2020-12-22 10:27:46,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:46,943 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 320 transitions. [2020-12-22 10:27:46,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:27:46,944 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 320 transitions. [2020-12-22 10:27:46,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:27:46,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:46,944 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:47,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 10:27:47,159 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:47,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:47,160 INFO L82 PathProgramCache]: Analyzing trace with hash 34560387, now seen corresponding path program 14 times [2020-12-22 10:27:47,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:47,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643105275] [2020-12-22 10:27:47,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:47,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643105275] [2020-12-22 10:27:47,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506248193] [2020-12-22 10:27:47,261 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:47,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:27:47,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:47,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:27:47,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:47,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:47,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 10:27:47,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976559593] [2020-12-22 10:27:47,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:27:47,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:47,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:27:47,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:27:47,373 INFO L87 Difference]: Start difference. First operand 125 states and 320 transitions. Second operand 9 states. [2020-12-22 10:27:47,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:47,470 INFO L93 Difference]: Finished difference Result 153 states and 371 transitions. [2020-12-22 10:27:47,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:27:47,470 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-22 10:27:47,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:47,472 INFO L225 Difference]: With dead ends: 153 [2020-12-22 10:27:47,472 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 10:27:47,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:27:47,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 10:27:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 131. [2020-12-22 10:27:47,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-22 10:27:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 332 transitions. [2020-12-22 10:27:47,477 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 332 transitions. Word has length 12 [2020-12-22 10:27:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:47,477 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 332 transitions. [2020-12-22 10:27:47,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:27:47,477 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 332 transitions. [2020-12-22 10:27:47,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:27:47,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:47,478 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:47,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 10:27:47,692 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:47,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:47,692 INFO L82 PathProgramCache]: Analyzing trace with hash 34841247, now seen corresponding path program 15 times [2020-12-22 10:27:47,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:47,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853704073] [2020-12-22 10:27:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:47,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853704073] [2020-12-22 10:27:47,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313704708] [2020-12-22 10:27:47,774 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:47,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:27:47,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:47,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:27:47,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:47,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:47,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-22 10:27:47,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704932632] [2020-12-22 10:27:47,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:27:47,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:47,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:27:47,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:27:47,901 INFO L87 Difference]: Start difference. First operand 131 states and 332 transitions. Second operand 11 states. [2020-12-22 10:27:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:48,114 INFO L93 Difference]: Finished difference Result 205 states and 487 transitions. [2020-12-22 10:27:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:27:48,115 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2020-12-22 10:27:48,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:48,116 INFO L225 Difference]: With dead ends: 205 [2020-12-22 10:27:48,116 INFO L226 Difference]: Without dead ends: 193 [2020-12-22 10:27:48,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:27:48,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-22 10:27:48,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 124. [2020-12-22 10:27:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-22 10:27:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 326 transitions. [2020-12-22 10:27:48,122 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 326 transitions. Word has length 12 [2020-12-22 10:27:48,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:48,122 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 326 transitions. [2020-12-22 10:27:48,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:27:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 326 transitions. [2020-12-22 10:27:48,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:27:48,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:48,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:48,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:48,337 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:48,337 INFO L82 PathProgramCache]: Analyzing trace with hash 896494529, now seen corresponding path program 16 times [2020-12-22 10:27:48,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:48,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259042665] [2020-12-22 10:27:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:48,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259042665] [2020-12-22 10:27:48,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867795957] [2020-12-22 10:27:48,418 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:48,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:27:48,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:48,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:48,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:48,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:48,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:27:48,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193432928] [2020-12-22 10:27:48,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:27:48,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:48,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:27:48,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:27:48,641 INFO L87 Difference]: Start difference. First operand 124 states and 326 transitions. Second operand 13 states. [2020-12-22 10:27:48,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:48,826 INFO L93 Difference]: Finished difference Result 169 states and 412 transitions. [2020-12-22 10:27:48,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:27:48,826 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:27:48,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:48,828 INFO L225 Difference]: With dead ends: 169 [2020-12-22 10:27:48,828 INFO L226 Difference]: Without dead ends: 167 [2020-12-22 10:27:48,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:27:48,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-22 10:27:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 130. [2020-12-22 10:27:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-22 10:27:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 336 transitions. [2020-12-22 10:27:48,835 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 336 transitions. Word has length 12 [2020-12-22 10:27:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:48,835 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 336 transitions. [2020-12-22 10:27:48,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:27:48,836 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 336 transitions. [2020-12-22 10:27:48,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:27:48,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:48,836 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:49,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:49,051 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:49,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:49,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1166400989, now seen corresponding path program 17 times [2020-12-22 10:27:49,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:49,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697993996] [2020-12-22 10:27:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:49,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697993996] [2020-12-22 10:27:49,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121467773] [2020-12-22 10:27:49,124 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:49,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:27:49,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:49,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:49,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:49,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:49,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:27:49,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420174798] [2020-12-22 10:27:49,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:27:49,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:49,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:27:49,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:27:49,304 INFO L87 Difference]: Start difference. First operand 130 states and 336 transitions. Second operand 13 states. [2020-12-22 10:27:49,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:49,544 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-12-22 10:27:49,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:27:49,544 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:27:49,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:49,546 INFO L225 Difference]: With dead ends: 182 [2020-12-22 10:27:49,546 INFO L226 Difference]: Without dead ends: 180 [2020-12-22 10:27:49,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:27:49,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-22 10:27:49,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 131. [2020-12-22 10:27:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-22 10:27:49,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 338 transitions. [2020-12-22 10:27:49,552 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 338 transitions. Word has length 12 [2020-12-22 10:27:49,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:49,553 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 338 transitions. [2020-12-22 10:27:49,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:27:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 338 transitions. [2020-12-22 10:27:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:27:49,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:49,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:49,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:49,769 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:49,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:49,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1167006419, now seen corresponding path program 18 times [2020-12-22 10:27:49,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:49,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852703546] [2020-12-22 10:27:49,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:49,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852703546] [2020-12-22 10:27:49,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881288446] [2020-12-22 10:27:49,838 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:49,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:27:49,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:49,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:27:49,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:50,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:50,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:27:50,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783145027] [2020-12-22 10:27:50,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:27:50,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:50,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:27:50,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:27:50,044 INFO L87 Difference]: Start difference. First operand 131 states and 338 transitions. Second operand 13 states. [2020-12-22 10:27:50,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:50,290 INFO L93 Difference]: Finished difference Result 184 states and 442 transitions. [2020-12-22 10:27:50,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:27:50,291 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:27:50,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:50,293 INFO L225 Difference]: With dead ends: 184 [2020-12-22 10:27:50,294 INFO L226 Difference]: Without dead ends: 182 [2020-12-22 10:27:50,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:27:50,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-22 10:27:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 134. [2020-12-22 10:27:50,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 10:27:50,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 350 transitions. [2020-12-22 10:27:50,299 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 350 transitions. Word has length 12 [2020-12-22 10:27:50,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:50,300 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 350 transitions. [2020-12-22 10:27:50,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:27:50,300 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 350 transitions. [2020-12-22 10:27:50,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:27:50,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:50,301 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:50,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 10:27:50,516 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:50,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:50,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1167025887, now seen corresponding path program 19 times [2020-12-22 10:27:50,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:50,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920548343] [2020-12-22 10:27:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:50,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920548343] [2020-12-22 10:27:50,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899714347] [2020-12-22 10:27:50,636 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:50,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:50,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:50,806 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:27:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:50,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:50,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:27:50,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693320875] [2020-12-22 10:27:50,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:27:50,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:50,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:27:50,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:27:50,829 INFO L87 Difference]: Start difference. First operand 134 states and 350 transitions. Second operand 14 states. [2020-12-22 10:27:51,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:51,313 INFO L93 Difference]: Finished difference Result 215 states and 510 transitions. [2020-12-22 10:27:51,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:27:51,314 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:27:51,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:51,315 INFO L225 Difference]: With dead ends: 215 [2020-12-22 10:27:51,315 INFO L226 Difference]: Without dead ends: 203 [2020-12-22 10:27:51,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:27:51,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-22 10:27:51,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 131. [2020-12-22 10:27:51,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-22 10:27:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 342 transitions. [2020-12-22 10:27:51,322 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 342 transitions. Word has length 12 [2020-12-22 10:27:51,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:51,322 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 342 transitions. [2020-12-22 10:27:51,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:27:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 342 transitions. [2020-12-22 10:27:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:27:51,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:51,323 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:51,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:51,537 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:51,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:51,538 INFO L82 PathProgramCache]: Analyzing trace with hash 608997331, now seen corresponding path program 20 times [2020-12-22 10:27:51,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:51,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947902014] [2020-12-22 10:27:51,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:51,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947902014] [2020-12-22 10:27:51,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141317420] [2020-12-22 10:27:51,608 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:51,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:27:51,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:51,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:51,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:51,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:51,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:27:51,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203695269] [2020-12-22 10:27:51,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:27:51,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:51,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:27:51,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:27:51,795 INFO L87 Difference]: Start difference. First operand 131 states and 342 transitions. Second operand 13 states. [2020-12-22 10:27:51,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:51,945 INFO L93 Difference]: Finished difference Result 171 states and 424 transitions. [2020-12-22 10:27:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:27:51,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:27:51,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:51,948 INFO L225 Difference]: With dead ends: 171 [2020-12-22 10:27:51,948 INFO L226 Difference]: Without dead ends: 169 [2020-12-22 10:27:51,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:27:51,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-22 10:27:51,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2020-12-22 10:27:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 10:27:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 350 transitions. [2020-12-22 10:27:51,953 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 350 transitions. Word has length 12 [2020-12-22 10:27:51,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:51,953 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 350 transitions. [2020-12-22 10:27:51,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:27:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 350 transitions. [2020-12-22 10:27:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:27:51,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:51,954 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:52,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 10:27:52,165 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:52,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:52,166 INFO L82 PathProgramCache]: Analyzing trace with hash 609054991, now seen corresponding path program 21 times [2020-12-22 10:27:52,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:52,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662543809] [2020-12-22 10:27:52,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:52,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662543809] [2020-12-22 10:27:52,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609291598] [2020-12-22 10:27:52,242 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:52,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:27:52,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:52,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:52,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:52,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:52,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:27:52,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230875683] [2020-12-22 10:27:52,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:27:52,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:52,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:27:52,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:27:52,459 INFO L87 Difference]: Start difference. First operand 134 states and 350 transitions. Second operand 13 states. [2020-12-22 10:27:52,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:52,574 INFO L93 Difference]: Finished difference Result 167 states and 418 transitions. [2020-12-22 10:27:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:27:52,574 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:27:52,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:52,576 INFO L225 Difference]: With dead ends: 167 [2020-12-22 10:27:52,576 INFO L226 Difference]: Without dead ends: 165 [2020-12-22 10:27:52,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:27:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-22 10:27:52,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 136. [2020-12-22 10:27:52,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-22 10:27:52,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 355 transitions. [2020-12-22 10:27:52,583 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 355 transitions. Word has length 12 [2020-12-22 10:27:52,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:52,584 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 355 transitions. [2020-12-22 10:27:52,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:27:52,584 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 355 transitions. [2020-12-22 10:27:52,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:27:52,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:52,585 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:52,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:52,798 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:52,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:52,798 INFO L82 PathProgramCache]: Analyzing trace with hash 386162999, now seen corresponding path program 22 times [2020-12-22 10:27:52,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:52,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449445945] [2020-12-22 10:27:52,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:52,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449445945] [2020-12-22 10:27:52,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049831006] [2020-12-22 10:27:52,869 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:52,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:27:52,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:52,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:52,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:53,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:53,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:27:53,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617493327] [2020-12-22 10:27:53,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:27:53,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:53,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:27:53,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:27:53,055 INFO L87 Difference]: Start difference. First operand 136 states and 355 transitions. Second operand 13 states. [2020-12-22 10:27:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:53,245 INFO L93 Difference]: Finished difference Result 178 states and 438 transitions. [2020-12-22 10:27:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:27:53,246 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:27:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:53,248 INFO L225 Difference]: With dead ends: 178 [2020-12-22 10:27:53,248 INFO L226 Difference]: Without dead ends: 176 [2020-12-22 10:27:53,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:27:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-22 10:27:53,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 136. [2020-12-22 10:27:53,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-22 10:27:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 355 transitions. [2020-12-22 10:27:53,253 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 355 transitions. Word has length 12 [2020-12-22 10:27:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:53,253 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 355 transitions. [2020-12-22 10:27:53,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:27:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 355 transitions. [2020-12-22 10:27:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:27:53,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:53,254 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:53,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 10:27:53,468 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:53,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:53,468 INFO L82 PathProgramCache]: Analyzing trace with hash 386220659, now seen corresponding path program 23 times [2020-12-22 10:27:53,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:53,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482377036] [2020-12-22 10:27:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:53,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482377036] [2020-12-22 10:27:53,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352514964] [2020-12-22 10:27:53,542 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:53,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:27:53,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:53,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:53,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:53,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:53,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:27:53,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406852184] [2020-12-22 10:27:53,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:27:53,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:53,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:27:53,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:27:53,740 INFO L87 Difference]: Start difference. First operand 136 states and 355 transitions. Second operand 13 states. [2020-12-22 10:27:53,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:53,867 INFO L93 Difference]: Finished difference Result 173 states and 429 transitions. [2020-12-22 10:27:53,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:27:53,867 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:27:53,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:53,869 INFO L225 Difference]: With dead ends: 173 [2020-12-22 10:27:53,869 INFO L226 Difference]: Without dead ends: 171 [2020-12-22 10:27:53,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:27:53,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-22 10:27:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 134. [2020-12-22 10:27:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 10:27:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 350 transitions. [2020-12-22 10:27:53,878 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 350 transitions. Word has length 12 [2020-12-22 10:27:53,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:53,878 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 350 transitions. [2020-12-22 10:27:53,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:27:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 350 transitions. [2020-12-22 10:27:53,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:27:53,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:53,879 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:54,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:54,095 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:54,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:54,096 INFO L82 PathProgramCache]: Analyzing trace with hash 404931329, now seen corresponding path program 24 times [2020-12-22 10:27:54,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:54,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895161590] [2020-12-22 10:27:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:54,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895161590] [2020-12-22 10:27:54,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223765714] [2020-12-22 10:27:54,167 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:54,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:27:54,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:54,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:54,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:54,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:54,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:27:54,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406918626] [2020-12-22 10:27:54,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:27:54,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:54,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:27:54,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:27:54,355 INFO L87 Difference]: Start difference. First operand 134 states and 350 transitions. Second operand 13 states. [2020-12-22 10:27:54,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:54,596 INFO L93 Difference]: Finished difference Result 181 states and 440 transitions. [2020-12-22 10:27:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:27:54,596 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:27:54,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:54,598 INFO L225 Difference]: With dead ends: 181 [2020-12-22 10:27:54,598 INFO L226 Difference]: Without dead ends: 179 [2020-12-22 10:27:54,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:27:54,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-22 10:27:54,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 135. [2020-12-22 10:27:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-22 10:27:54,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 352 transitions. [2020-12-22 10:27:54,604 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 352 transitions. Word has length 12 [2020-12-22 10:27:54,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:54,605 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 352 transitions. [2020-12-22 10:27:54,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:27:54,605 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 352 transitions. [2020-12-22 10:27:54,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:27:54,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:54,606 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:54,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 10:27:54,820 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:54,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:54,821 INFO L82 PathProgramCache]: Analyzing trace with hash 405594419, now seen corresponding path program 25 times [2020-12-22 10:27:54,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:54,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656077368] [2020-12-22 10:27:54,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:54,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656077368] [2020-12-22 10:27:54,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335693782] [2020-12-22 10:27:54,895 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:54,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:54,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:55,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:55,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:27:55,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054520560] [2020-12-22 10:27:55,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:27:55,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:55,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:27:55,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:27:55,088 INFO L87 Difference]: Start difference. First operand 135 states and 352 transitions. Second operand 13 states. [2020-12-22 10:27:55,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:55,381 INFO L93 Difference]: Finished difference Result 189 states and 454 transitions. [2020-12-22 10:27:55,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:27:55,382 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:27:55,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:55,384 INFO L225 Difference]: With dead ends: 189 [2020-12-22 10:27:55,384 INFO L226 Difference]: Without dead ends: 187 [2020-12-22 10:27:55,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:27:55,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-22 10:27:55,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 137. [2020-12-22 10:27:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-22 10:27:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 359 transitions. [2020-12-22 10:27:55,390 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 359 transitions. Word has length 12 [2020-12-22 10:27:55,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:55,391 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 359 transitions. [2020-12-22 10:27:55,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:27:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 359 transitions. [2020-12-22 10:27:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:27:55,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:55,392 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:55,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 10:27:55,606 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:55,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:55,606 INFO L82 PathProgramCache]: Analyzing trace with hash 405615809, now seen corresponding path program 26 times [2020-12-22 10:27:55,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:55,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806874740] [2020-12-22 10:27:55,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:55,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806874740] [2020-12-22 10:27:55,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572921028] [2020-12-22 10:27:55,695 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:55,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:27:55,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:55,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:55,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:55,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:55,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:27:55,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111460741] [2020-12-22 10:27:55,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:27:55,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:55,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:27:55,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:27:55,889 INFO L87 Difference]: Start difference. First operand 137 states and 359 transitions. Second operand 14 states. [2020-12-22 10:27:56,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:56,465 INFO L93 Difference]: Finished difference Result 239 states and 565 transitions. [2020-12-22 10:27:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:27:56,465 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:27:56,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:56,467 INFO L225 Difference]: With dead ends: 239 [2020-12-22 10:27:56,467 INFO L226 Difference]: Without dead ends: 227 [2020-12-22 10:27:56,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=641, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:27:56,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-22 10:27:56,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 134. [2020-12-22 10:27:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 10:27:56,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 352 transitions. [2020-12-22 10:27:56,473 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 352 transitions. Word has length 12 [2020-12-22 10:27:56,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:56,474 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 352 transitions. [2020-12-22 10:27:56,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:27:56,474 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 352 transitions. [2020-12-22 10:27:56,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:27:56,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:56,474 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:56,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 10:27:56,688 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:56,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:56,688 INFO L82 PathProgramCache]: Analyzing trace with hash 406776449, now seen corresponding path program 27 times [2020-12-22 10:27:56,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:56,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105332661] [2020-12-22 10:27:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:56,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105332661] [2020-12-22 10:27:56,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365323644] [2020-12-22 10:27:56,767 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:56,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:27:56,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:56,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:56,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:56,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:56,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:27:56,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714078169] [2020-12-22 10:27:56,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:27:56,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:56,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:27:56,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:27:56,938 INFO L87 Difference]: Start difference. First operand 134 states and 352 transitions. Second operand 13 states. [2020-12-22 10:27:57,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:57,097 INFO L93 Difference]: Finished difference Result 177 states and 440 transitions. [2020-12-22 10:27:57,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:27:57,097 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:27:57,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:57,098 INFO L225 Difference]: With dead ends: 177 [2020-12-22 10:27:57,098 INFO L226 Difference]: Without dead ends: 175 [2020-12-22 10:27:57,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:27:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-22 10:27:57,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2020-12-22 10:27:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 10:27:57,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 347 transitions. [2020-12-22 10:27:57,104 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 347 transitions. Word has length 12 [2020-12-22 10:27:57,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:57,105 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 347 transitions. [2020-12-22 10:27:57,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:27:57,105 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 347 transitions. [2020-12-22 10:27:57,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:27:57,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:57,106 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:57,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 10:27:57,321 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:57,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:57,321 INFO L82 PathProgramCache]: Analyzing trace with hash 407381879, now seen corresponding path program 28 times [2020-12-22 10:27:57,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:57,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765427614] [2020-12-22 10:27:57,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:57,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765427614] [2020-12-22 10:27:57,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126844991] [2020-12-22 10:27:57,390 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:57,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:27:57,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:57,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:57,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:57,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:57,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:27:57,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909190508] [2020-12-22 10:27:57,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:27:57,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:57,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:27:57,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:27:57,581 INFO L87 Difference]: Start difference. First operand 132 states and 347 transitions. Second operand 13 states. [2020-12-22 10:27:57,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:57,778 INFO L93 Difference]: Finished difference Result 172 states and 428 transitions. [2020-12-22 10:27:57,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:27:57,779 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:27:57,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:57,783 INFO L225 Difference]: With dead ends: 172 [2020-12-22 10:27:57,783 INFO L226 Difference]: Without dead ends: 170 [2020-12-22 10:27:57,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:27:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-22 10:27:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 134. [2020-12-22 10:27:57,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 10:27:57,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 354 transitions. [2020-12-22 10:27:57,789 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 354 transitions. Word has length 12 [2020-12-22 10:27:57,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:57,789 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 354 transitions. [2020-12-22 10:27:57,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:27:57,789 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 354 transitions. [2020-12-22 10:27:57,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:27:57,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:57,790 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:58,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:58,004 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:58,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:58,004 INFO L82 PathProgramCache]: Analyzing trace with hash 407401347, now seen corresponding path program 29 times [2020-12-22 10:27:58,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:58,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188390566] [2020-12-22 10:27:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:58,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188390566] [2020-12-22 10:27:58,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3620486] [2020-12-22 10:27:58,090 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:58,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:27:58,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:58,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:27:58,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:58,255 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:27:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:58,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:58,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:27:58,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690599016] [2020-12-22 10:27:58,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:27:58,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:58,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:27:58,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:27:58,282 INFO L87 Difference]: Start difference. First operand 134 states and 354 transitions. Second operand 14 states. [2020-12-22 10:27:58,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:58,677 INFO L93 Difference]: Finished difference Result 219 states and 526 transitions. [2020-12-22 10:27:58,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:27:58,677 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:27:58,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:58,678 INFO L225 Difference]: With dead ends: 219 [2020-12-22 10:27:58,678 INFO L226 Difference]: Without dead ends: 207 [2020-12-22 10:27:58,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:27:58,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-22 10:27:58,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 133. [2020-12-22 10:27:58,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-22 10:27:58,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 350 transitions. [2020-12-22 10:27:58,683 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 350 transitions. Word has length 12 [2020-12-22 10:27:58,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:58,683 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 350 transitions. [2020-12-22 10:27:58,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:27:58,684 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 350 transitions. [2020-12-22 10:27:58,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:27:58,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:58,684 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:58,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 10:27:58,900 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:58,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:58,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1977266529, now seen corresponding path program 4 times [2020-12-22 10:27:58,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:58,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862387655] [2020-12-22 10:27:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:58,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862387655] [2020-12-22 10:27:58,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777287506] [2020-12-22 10:27:58,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:59,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:27:59,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:59,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 10:27:59,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:59,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 10:27:59,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-12-22 10:27:59,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636330017] [2020-12-22 10:27:59,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:27:59,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:59,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:27:59,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:27:59,057 INFO L87 Difference]: Start difference. First operand 133 states and 350 transitions. Second operand 8 states. [2020-12-22 10:27:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:59,082 INFO L93 Difference]: Finished difference Result 186 states and 512 transitions. [2020-12-22 10:27:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:27:59,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-22 10:27:59,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:59,084 INFO L225 Difference]: With dead ends: 186 [2020-12-22 10:27:59,084 INFO L226 Difference]: Without dead ends: 179 [2020-12-22 10:27:59,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:27:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-22 10:27:59,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2020-12-22 10:27:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-22 10:27:59,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 499 transitions. [2020-12-22 10:27:59,092 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 499 transitions. Word has length 13 [2020-12-22 10:27:59,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:59,093 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 499 transitions. [2020-12-22 10:27:59,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:27:59,093 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 499 transitions. [2020-12-22 10:27:59,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:27:59,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:59,095 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:59,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 10:27:59,310 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:59,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:59,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1447090257, now seen corresponding path program 30 times [2020-12-22 10:27:59,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:59,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657825965] [2020-12-22 10:27:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:59,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657825965] [2020-12-22 10:27:59,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061276875] [2020-12-22 10:27:59,448 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:59,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:27:59,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:27:59,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:27:59,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:27:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:59,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:27:59,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-22 10:27:59,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531073801] [2020-12-22 10:27:59,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:27:59,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:59,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:27:59,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:27:59,579 INFO L87 Difference]: Start difference. First operand 179 states and 499 transitions. Second operand 11 states. [2020-12-22 10:27:59,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:59,701 INFO L93 Difference]: Finished difference Result 219 states and 572 transitions. [2020-12-22 10:27:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:27:59,701 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-22 10:27:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:59,703 INFO L225 Difference]: With dead ends: 219 [2020-12-22 10:27:59,703 INFO L226 Difference]: Without dead ends: 216 [2020-12-22 10:27:59,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:27:59,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-22 10:27:59,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 185. [2020-12-22 10:27:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-22 10:27:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 509 transitions. [2020-12-22 10:27:59,710 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 509 transitions. Word has length 13 [2020-12-22 10:27:59,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:59,710 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 509 transitions. [2020-12-22 10:27:59,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:27:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 509 transitions. [2020-12-22 10:27:59,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:27:59,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:59,711 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:59,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:27:59,925 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:59,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:59,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1447371117, now seen corresponding path program 31 times [2020-12-22 10:27:59,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:59,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350125063] [2020-12-22 10:27:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:00,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350125063] [2020-12-22 10:28:00,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559949485] [2020-12-22 10:28:00,026 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:00,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:00,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:00,240 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:28:00,243 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:28:00,245 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:00,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:00,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:00,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13651364] [2020-12-22 10:28:00,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:00,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:00,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:00,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:00,268 INFO L87 Difference]: Start difference. First operand 185 states and 509 transitions. Second operand 16 states. [2020-12-22 10:28:00,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:00,689 INFO L93 Difference]: Finished difference Result 282 states and 719 transitions. [2020-12-22 10:28:00,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:28:00,689 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:00,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:00,691 INFO L225 Difference]: With dead ends: 282 [2020-12-22 10:28:00,692 INFO L226 Difference]: Without dead ends: 269 [2020-12-22 10:28:00,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:28:00,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-12-22 10:28:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 182. [2020-12-22 10:28:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-22 10:28:00,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 509 transitions. [2020-12-22 10:28:00,699 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 509 transitions. Word has length 13 [2020-12-22 10:28:00,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:00,699 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 509 transitions. [2020-12-22 10:28:00,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:00,699 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 509 transitions. [2020-12-22 10:28:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:00,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:00,700 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:00,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 10:28:00,915 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:00,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1985942897, now seen corresponding path program 32 times [2020-12-22 10:28:00,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:00,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464527952] [2020-12-22 10:28:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:01,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464527952] [2020-12-22 10:28:01,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239829890] [2020-12-22 10:28:01,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:01,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:01,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:01,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:01,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:01,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:01,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:01,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245770215] [2020-12-22 10:28:01,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:01,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:01,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:01,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:01,282 INFO L87 Difference]: Start difference. First operand 182 states and 509 transitions. Second operand 16 states. [2020-12-22 10:28:01,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:01,604 INFO L93 Difference]: Finished difference Result 253 states and 656 transitions. [2020-12-22 10:28:01,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:28:01,604 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:01,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:01,606 INFO L225 Difference]: With dead ends: 253 [2020-12-22 10:28:01,606 INFO L226 Difference]: Without dead ends: 248 [2020-12-22 10:28:01,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:28:01,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-22 10:28:01,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 187. [2020-12-22 10:28:01,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-22 10:28:01,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 518 transitions. [2020-12-22 10:28:01,613 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 518 transitions. Word has length 13 [2020-12-22 10:28:01,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:01,613 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 518 transitions. [2020-12-22 10:28:01,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:01,613 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 518 transitions. [2020-12-22 10:28:01,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:01,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:01,614 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:01,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:01,828 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:01,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:01,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1716036437, now seen corresponding path program 33 times [2020-12-22 10:28:01,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:01,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520705131] [2020-12-22 10:28:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:01,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520705131] [2020-12-22 10:28:01,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334908070] [2020-12-22 10:28:01,924 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:01,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:28:01,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:01,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:01,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:02,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:02,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:02,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400566611] [2020-12-22 10:28:02,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:02,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:02,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:02,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:02,184 INFO L87 Difference]: Start difference. First operand 187 states and 518 transitions. Second operand 16 states. [2020-12-22 10:28:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:02,531 INFO L93 Difference]: Finished difference Result 270 states and 688 transitions. [2020-12-22 10:28:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:28:02,532 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:02,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:02,534 INFO L225 Difference]: With dead ends: 270 [2020-12-22 10:28:02,534 INFO L226 Difference]: Without dead ends: 265 [2020-12-22 10:28:02,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:28:02,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-22 10:28:02,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 189. [2020-12-22 10:28:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 10:28:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 525 transitions. [2020-12-22 10:28:02,542 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 525 transitions. Word has length 13 [2020-12-22 10:28:02,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:02,542 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 525 transitions. [2020-12-22 10:28:02,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:02,542 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 525 transitions. [2020-12-22 10:28:02,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:02,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:02,543 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:02,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 10:28:02,757 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:02,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:02,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1715431007, now seen corresponding path program 34 times [2020-12-22 10:28:02,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:02,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611682656] [2020-12-22 10:28:02,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:02,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611682656] [2020-12-22 10:28:02,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561651685] [2020-12-22 10:28:02,847 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:02,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:02,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:02,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:02,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:03,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:03,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:03,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202202475] [2020-12-22 10:28:03,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:03,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:03,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:03,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:03,090 INFO L87 Difference]: Start difference. First operand 189 states and 525 transitions. Second operand 16 states. [2020-12-22 10:28:03,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:03,504 INFO L93 Difference]: Finished difference Result 264 states and 678 transitions. [2020-12-22 10:28:03,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:28:03,504 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:03,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:03,506 INFO L225 Difference]: With dead ends: 264 [2020-12-22 10:28:03,506 INFO L226 Difference]: Without dead ends: 259 [2020-12-22 10:28:03,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:28:03,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-22 10:28:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 192. [2020-12-22 10:28:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-22 10:28:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 537 transitions. [2020-12-22 10:28:03,514 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 537 transitions. Word has length 13 [2020-12-22 10:28:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:03,514 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 537 transitions. [2020-12-22 10:28:03,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 537 transitions. [2020-12-22 10:28:03,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:03,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:03,515 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:03,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 10:28:03,730 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:03,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:03,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1715411539, now seen corresponding path program 35 times [2020-12-22 10:28:03,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:03,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880444148] [2020-12-22 10:28:03,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:03,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880444148] [2020-12-22 10:28:03,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661304442] [2020-12-22 10:28:03,823 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:03,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:28:03,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:03,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:03,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:04,039 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:04,041 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:28:04,043 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:04,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:04,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:04,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789333203] [2020-12-22 10:28:04,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:04,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:04,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:04,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:04,067 INFO L87 Difference]: Start difference. First operand 192 states and 537 transitions. Second operand 16 states. [2020-12-22 10:28:04,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:04,706 INFO L93 Difference]: Finished difference Result 310 states and 800 transitions. [2020-12-22 10:28:04,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:28:04,707 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:04,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:04,709 INFO L225 Difference]: With dead ends: 310 [2020-12-22 10:28:04,709 INFO L226 Difference]: Without dead ends: 291 [2020-12-22 10:28:04,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=769, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:28:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-22 10:28:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 186. [2020-12-22 10:28:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-22 10:28:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 523 transitions. [2020-12-22 10:28:04,716 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 523 transitions. Word has length 13 [2020-12-22 10:28:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:04,716 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 523 transitions. [2020-12-22 10:28:04,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 523 transitions. [2020-12-22 10:28:04,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:04,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:04,717 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:04,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 10:28:04,932 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:04,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:04,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2021527201, now seen corresponding path program 36 times [2020-12-22 10:28:04,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:04,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519306933] [2020-12-22 10:28:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:05,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519306933] [2020-12-22 10:28:05,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406513037] [2020-12-22 10:28:05,033 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:05,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:28:05,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:05,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:05,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:05,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:05,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:05,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713263754] [2020-12-22 10:28:05,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:05,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:05,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:05,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:05,248 INFO L87 Difference]: Start difference. First operand 186 states and 523 transitions. Second operand 16 states. [2020-12-22 10:28:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:05,526 INFO L93 Difference]: Finished difference Result 268 states and 697 transitions. [2020-12-22 10:28:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:28:05,527 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:05,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:05,528 INFO L225 Difference]: With dead ends: 268 [2020-12-22 10:28:05,529 INFO L226 Difference]: Without dead ends: 262 [2020-12-22 10:28:05,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:28:05,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-22 10:28:05,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 193. [2020-12-22 10:28:05,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-22 10:28:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 536 transitions. [2020-12-22 10:28:05,535 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 536 transitions. Word has length 13 [2020-12-22 10:28:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:05,535 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 536 transitions. [2020-12-22 10:28:05,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:05,535 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 536 transitions. [2020-12-22 10:28:05,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:05,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:05,536 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:05,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-22 10:28:05,750 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:05,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:05,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2021584861, now seen corresponding path program 37 times [2020-12-22 10:28:05,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:05,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983169061] [2020-12-22 10:28:05,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:05,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983169061] [2020-12-22 10:28:05,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731274927] [2020-12-22 10:28:05,843 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:05,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:05,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:06,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:06,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:06,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129251897] [2020-12-22 10:28:06,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:06,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:06,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:06,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:06,075 INFO L87 Difference]: Start difference. First operand 193 states and 536 transitions. Second operand 16 states. [2020-12-22 10:28:06,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:06,431 INFO L93 Difference]: Finished difference Result 262 states and 685 transitions. [2020-12-22 10:28:06,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:28:06,432 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:06,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:06,434 INFO L225 Difference]: With dead ends: 262 [2020-12-22 10:28:06,434 INFO L226 Difference]: Without dead ends: 257 [2020-12-22 10:28:06,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:28:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-22 10:28:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 194. [2020-12-22 10:28:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-22 10:28:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 539 transitions. [2020-12-22 10:28:06,441 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 539 transitions. Word has length 13 [2020-12-22 10:28:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:06,441 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 539 transitions. [2020-12-22 10:28:06,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 539 transitions. [2020-12-22 10:28:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:06,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:06,442 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:06,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:06,658 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:06,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:06,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1798692869, now seen corresponding path program 38 times [2020-12-22 10:28:06,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:06,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897870769] [2020-12-22 10:28:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897870769] [2020-12-22 10:28:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761620154] [2020-12-22 10:28:06,753 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:06,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:06,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:06,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:06,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:06,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:06,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:06,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286430931] [2020-12-22 10:28:06,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:06,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:06,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:06,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:06,973 INFO L87 Difference]: Start difference. First operand 194 states and 539 transitions. Second operand 16 states. [2020-12-22 10:28:07,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:07,303 INFO L93 Difference]: Finished difference Result 285 states and 729 transitions. [2020-12-22 10:28:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:28:07,304 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:07,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:07,305 INFO L225 Difference]: With dead ends: 285 [2020-12-22 10:28:07,305 INFO L226 Difference]: Without dead ends: 279 [2020-12-22 10:28:07,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:28:07,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-22 10:28:07,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 195. [2020-12-22 10:28:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 10:28:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 541 transitions. [2020-12-22 10:28:07,311 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 541 transitions. Word has length 13 [2020-12-22 10:28:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:07,312 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 541 transitions. [2020-12-22 10:28:07,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:07,312 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 541 transitions. [2020-12-22 10:28:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:07,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:07,313 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:07,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 10:28:07,527 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:07,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:07,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1798750529, now seen corresponding path program 39 times [2020-12-22 10:28:07,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:07,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112114707] [2020-12-22 10:28:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:07,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112114707] [2020-12-22 10:28:07,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424783856] [2020-12-22 10:28:07,611 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:07,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:28:07,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:07,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:07,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:07,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:07,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:07,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522077250] [2020-12-22 10:28:07,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:07,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:07,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:07,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:07,873 INFO L87 Difference]: Start difference. First operand 195 states and 541 transitions. Second operand 16 states. [2020-12-22 10:28:08,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:08,174 INFO L93 Difference]: Finished difference Result 274 states and 708 transitions. [2020-12-22 10:28:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:28:08,174 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:08,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:08,176 INFO L225 Difference]: With dead ends: 274 [2020-12-22 10:28:08,176 INFO L226 Difference]: Without dead ends: 269 [2020-12-22 10:28:08,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:28:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-12-22 10:28:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 194. [2020-12-22 10:28:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-22 10:28:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 538 transitions. [2020-12-22 10:28:08,182 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 538 transitions. Word has length 13 [2020-12-22 10:28:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:08,182 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 538 transitions. [2020-12-22 10:28:08,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 538 transitions. [2020-12-22 10:28:08,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:08,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:08,183 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:08,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:08,384 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:08,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:08,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1817461199, now seen corresponding path program 40 times [2020-12-22 10:28:08,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:08,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551288117] [2020-12-22 10:28:08,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:08,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551288117] [2020-12-22 10:28:08,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563143344] [2020-12-22 10:28:08,473 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:08,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:08,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:08,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:08,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:08,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:08,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:08,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157405926] [2020-12-22 10:28:08,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:08,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:08,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:08,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:08,683 INFO L87 Difference]: Start difference. First operand 194 states and 538 transitions. Second operand 16 states. [2020-12-22 10:28:09,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:09,121 INFO L93 Difference]: Finished difference Result 283 states and 721 transitions. [2020-12-22 10:28:09,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:28:09,122 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:09,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:09,124 INFO L225 Difference]: With dead ends: 283 [2020-12-22 10:28:09,124 INFO L226 Difference]: Without dead ends: 277 [2020-12-22 10:28:09,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:28:09,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-12-22 10:28:09,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 195. [2020-12-22 10:28:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 10:28:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 542 transitions. [2020-12-22 10:28:09,131 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 542 transitions. Word has length 13 [2020-12-22 10:28:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:09,131 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 542 transitions. [2020-12-22 10:28:09,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:09,131 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 542 transitions. [2020-12-22 10:28:09,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:09,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:09,132 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:09,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 10:28:09,333 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:09,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:09,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1818124289, now seen corresponding path program 41 times [2020-12-22 10:28:09,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:09,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129793733] [2020-12-22 10:28:09,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:09,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129793733] [2020-12-22 10:28:09,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875299562] [2020-12-22 10:28:09,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:09,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:09,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:09,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:09,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:09,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:09,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:09,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134986759] [2020-12-22 10:28:09,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:09,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:09,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:09,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:09,642 INFO L87 Difference]: Start difference. First operand 195 states and 542 transitions. Second operand 16 states. [2020-12-22 10:28:10,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:10,134 INFO L93 Difference]: Finished difference Result 281 states and 719 transitions. [2020-12-22 10:28:10,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:28:10,135 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:10,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:10,137 INFO L225 Difference]: With dead ends: 281 [2020-12-22 10:28:10,138 INFO L226 Difference]: Without dead ends: 275 [2020-12-22 10:28:10,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:28:10,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-22 10:28:10,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 198. [2020-12-22 10:28:10,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 10:28:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 554 transitions. [2020-12-22 10:28:10,145 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 554 transitions. Word has length 13 [2020-12-22 10:28:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:10,145 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 554 transitions. [2020-12-22 10:28:10,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 554 transitions. [2020-12-22 10:28:10,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:10,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:10,146 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:10,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-22 10:28:10,360 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:10,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:10,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1818143757, now seen corresponding path program 42 times [2020-12-22 10:28:10,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:10,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170429298] [2020-12-22 10:28:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:10,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170429298] [2020-12-22 10:28:10,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865662696] [2020-12-22 10:28:10,452 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:10,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:28:10,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:10,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:10,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:10,650 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:10,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:10,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:10,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738562245] [2020-12-22 10:28:10,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:10,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:10,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:10,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:10,667 INFO L87 Difference]: Start difference. First operand 198 states and 554 transitions. Second operand 16 states. [2020-12-22 10:28:11,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:11,407 INFO L93 Difference]: Finished difference Result 354 states and 909 transitions. [2020-12-22 10:28:11,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:28:11,408 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:11,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:11,411 INFO L225 Difference]: With dead ends: 354 [2020-12-22 10:28:11,411 INFO L226 Difference]: Without dead ends: 336 [2020-12-22 10:28:11,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 10:28:11,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-12-22 10:28:11,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 192. [2020-12-22 10:28:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-22 10:28:11,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 536 transitions. [2020-12-22 10:28:11,417 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 536 transitions. Word has length 13 [2020-12-22 10:28:11,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:11,417 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 536 transitions. [2020-12-22 10:28:11,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 536 transitions. [2020-12-22 10:28:11,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:11,418 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:11,418 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:11,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:11,634 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:11,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1698987151, now seen corresponding path program 43 times [2020-12-22 10:28:11,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:11,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058433437] [2020-12-22 10:28:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:11,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058433437] [2020-12-22 10:28:11,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133959088] [2020-12-22 10:28:11,729 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:11,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:11,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:11,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:11,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:11,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12119642] [2020-12-22 10:28:11,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:11,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:11,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:11,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:11,938 INFO L87 Difference]: Start difference. First operand 192 states and 536 transitions. Second operand 16 states. [2020-12-22 10:28:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:12,134 INFO L93 Difference]: Finished difference Result 253 states and 670 transitions. [2020-12-22 10:28:12,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:28:12,135 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:12,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:12,136 INFO L225 Difference]: With dead ends: 253 [2020-12-22 10:28:12,136 INFO L226 Difference]: Without dead ends: 249 [2020-12-22 10:28:12,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:28:12,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-22 10:28:12,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 195. [2020-12-22 10:28:12,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 10:28:12,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 544 transitions. [2020-12-22 10:28:12,141 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 544 transitions. Word has length 13 [2020-12-22 10:28:12,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:12,141 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 544 transitions. [2020-12-22 10:28:12,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:12,142 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 544 transitions. [2020-12-22 10:28:12,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:12,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:12,142 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:12,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-22 10:28:12,344 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:12,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:12,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1698989073, now seen corresponding path program 44 times [2020-12-22 10:28:12,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:12,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880866765] [2020-12-22 10:28:12,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:12,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880866765] [2020-12-22 10:28:12,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990823287] [2020-12-22 10:28:12,429 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:12,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:12,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:12,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:12,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:12,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:12,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:12,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620662100] [2020-12-22 10:28:12,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:12,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:12,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:12,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:12,647 INFO L87 Difference]: Start difference. First operand 195 states and 544 transitions. Second operand 16 states. [2020-12-22 10:28:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:12,918 INFO L93 Difference]: Finished difference Result 265 states and 699 transitions. [2020-12-22 10:28:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:28:12,919 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:12,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:12,921 INFO L225 Difference]: With dead ends: 265 [2020-12-22 10:28:12,921 INFO L226 Difference]: Without dead ends: 259 [2020-12-22 10:28:12,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:28:12,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-22 10:28:12,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 198. [2020-12-22 10:28:12,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 10:28:12,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 552 transitions. [2020-12-22 10:28:12,929 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 552 transitions. Word has length 13 [2020-12-22 10:28:12,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:12,930 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 552 transitions. [2020-12-22 10:28:12,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:12,930 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 552 transitions. [2020-12-22 10:28:12,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:12,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:12,931 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:13,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-22 10:28:13,143 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:13,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:13,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1700893775, now seen corresponding path program 45 times [2020-12-22 10:28:13,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:13,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115114061] [2020-12-22 10:28:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:13,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115114061] [2020-12-22 10:28:13,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285860451] [2020-12-22 10:28:13,250 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:13,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:28:13,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:13,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:13,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:13,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:13,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:13,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713854927] [2020-12-22 10:28:13,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:13,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:13,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:13,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:13,465 INFO L87 Difference]: Start difference. First operand 198 states and 552 transitions. Second operand 16 states. [2020-12-22 10:28:13,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:13,649 INFO L93 Difference]: Finished difference Result 254 states and 677 transitions. [2020-12-22 10:28:13,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:13,651 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:13,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:13,653 INFO L225 Difference]: With dead ends: 254 [2020-12-22 10:28:13,653 INFO L226 Difference]: Without dead ends: 248 [2020-12-22 10:28:13,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:28:13,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-22 10:28:13,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 200. [2020-12-22 10:28:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-22 10:28:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 557 transitions. [2020-12-22 10:28:13,659 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 557 transitions. Word has length 13 [2020-12-22 10:28:13,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:13,659 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 557 transitions. [2020-12-22 10:28:13,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:13,659 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 557 transitions. [2020-12-22 10:28:13,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:13,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:13,660 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:13,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 10:28:13,875 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:13,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:13,875 INFO L82 PathProgramCache]: Analyzing trace with hash -913909845, now seen corresponding path program 46 times [2020-12-22 10:28:13,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:13,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553552929] [2020-12-22 10:28:13,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:13,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553552929] [2020-12-22 10:28:13,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513999426] [2020-12-22 10:28:13,974 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:14,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:14,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:14,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:14,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:14,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:14,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:14,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083778117] [2020-12-22 10:28:14,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:14,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:14,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:14,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:14,194 INFO L87 Difference]: Start difference. First operand 200 states and 557 transitions. Second operand 16 states. [2020-12-22 10:28:14,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:14,446 INFO L93 Difference]: Finished difference Result 267 states and 697 transitions. [2020-12-22 10:28:14,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:28:14,447 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:14,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:14,449 INFO L225 Difference]: With dead ends: 267 [2020-12-22 10:28:14,449 INFO L226 Difference]: Without dead ends: 263 [2020-12-22 10:28:14,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:28:14,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-22 10:28:14,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 201. [2020-12-22 10:28:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-22 10:28:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 560 transitions. [2020-12-22 10:28:14,455 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 560 transitions. Word has length 13 [2020-12-22 10:28:14,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:14,455 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 560 transitions. [2020-12-22 10:28:14,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 560 transitions. [2020-12-22 10:28:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:14,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:14,456 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:14,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:14,671 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:14,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:14,671 INFO L82 PathProgramCache]: Analyzing trace with hash -913907923, now seen corresponding path program 47 times [2020-12-22 10:28:14,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:14,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795574815] [2020-12-22 10:28:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:14,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795574815] [2020-12-22 10:28:14,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847255303] [2020-12-22 10:28:14,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:14,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:28:14,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:14,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:14,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:14,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:14,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:14,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582684227] [2020-12-22 10:28:14,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:14,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:14,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:14,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:14,980 INFO L87 Difference]: Start difference. First operand 201 states and 560 transitions. Second operand 16 states. [2020-12-22 10:28:15,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:15,332 INFO L93 Difference]: Finished difference Result 281 states and 730 transitions. [2020-12-22 10:28:15,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:28:15,333 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:15,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:15,335 INFO L225 Difference]: With dead ends: 281 [2020-12-22 10:28:15,336 INFO L226 Difference]: Without dead ends: 275 [2020-12-22 10:28:15,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:28:15,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-22 10:28:15,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 202. [2020-12-22 10:28:15,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-22 10:28:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 562 transitions. [2020-12-22 10:28:15,341 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 562 transitions. Word has length 13 [2020-12-22 10:28:15,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:15,341 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 562 transitions. [2020-12-22 10:28:15,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:15,341 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 562 transitions. [2020-12-22 10:28:15,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:15,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:15,342 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:15,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:15,543 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:15,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:15,544 INFO L82 PathProgramCache]: Analyzing trace with hash -912003221, now seen corresponding path program 48 times [2020-12-22 10:28:15,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:15,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463815469] [2020-12-22 10:28:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:15,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463815469] [2020-12-22 10:28:15,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270167302] [2020-12-22 10:28:15,645 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:15,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:28:15,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:15,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:15,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:15,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:15,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:15,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701001584] [2020-12-22 10:28:15,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:15,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:15,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:15,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:15,859 INFO L87 Difference]: Start difference. First operand 202 states and 562 transitions. Second operand 16 states. [2020-12-22 10:28:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:16,057 INFO L93 Difference]: Finished difference Result 266 states and 698 transitions. [2020-12-22 10:28:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:28:16,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:16,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:16,060 INFO L225 Difference]: With dead ends: 266 [2020-12-22 10:28:16,060 INFO L226 Difference]: Without dead ends: 260 [2020-12-22 10:28:16,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:28:16,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-22 10:28:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 198. [2020-12-22 10:28:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 10:28:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 552 transitions. [2020-12-22 10:28:16,066 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 552 transitions. Word has length 13 [2020-12-22 10:28:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:16,066 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 552 transitions. [2020-12-22 10:28:16,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 552 transitions. [2020-12-22 10:28:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:16,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:16,067 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:16,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:16,278 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:16,278 INFO L82 PathProgramCache]: Analyzing trace with hash -332091615, now seen corresponding path program 49 times [2020-12-22 10:28:16,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:16,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878901469] [2020-12-22 10:28:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:16,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878901469] [2020-12-22 10:28:16,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405912653] [2020-12-22 10:28:16,366 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:16,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:16,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:16,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:16,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290860104] [2020-12-22 10:28:16,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:16,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:16,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:16,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:16,597 INFO L87 Difference]: Start difference. First operand 198 states and 552 transitions. Second operand 16 states. [2020-12-22 10:28:16,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:16,819 INFO L93 Difference]: Finished difference Result 262 states and 682 transitions. [2020-12-22 10:28:16,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:28:16,820 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:16,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:16,822 INFO L225 Difference]: With dead ends: 262 [2020-12-22 10:28:16,822 INFO L226 Difference]: Without dead ends: 258 [2020-12-22 10:28:16,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:28:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-12-22 10:28:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 198. [2020-12-22 10:28:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 10:28:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 552 transitions. [2020-12-22 10:28:16,830 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 552 transitions. Word has length 13 [2020-12-22 10:28:16,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:16,830 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 552 transitions. [2020-12-22 10:28:16,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:16,830 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 552 transitions. [2020-12-22 10:28:16,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:16,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:16,831 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:17,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:17,046 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:17,047 INFO L82 PathProgramCache]: Analyzing trace with hash -332089693, now seen corresponding path program 50 times [2020-12-22 10:28:17,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:17,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192289930] [2020-12-22 10:28:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:17,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192289930] [2020-12-22 10:28:17,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346645358] [2020-12-22 10:28:17,125 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:17,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:17,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:17,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:17,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:17,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:17,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:17,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091917198] [2020-12-22 10:28:17,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:17,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:17,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:17,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:17,375 INFO L87 Difference]: Start difference. First operand 198 states and 552 transitions. Second operand 16 states. [2020-12-22 10:28:17,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:17,733 INFO L93 Difference]: Finished difference Result 286 states and 738 transitions. [2020-12-22 10:28:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:28:17,734 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:17,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:17,736 INFO L225 Difference]: With dead ends: 286 [2020-12-22 10:28:17,736 INFO L226 Difference]: Without dead ends: 280 [2020-12-22 10:28:17,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:28:17,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-12-22 10:28:17,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 197. [2020-12-22 10:28:17,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-22 10:28:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 549 transitions. [2020-12-22 10:28:17,742 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 549 transitions. Word has length 13 [2020-12-22 10:28:17,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:17,742 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 549 transitions. [2020-12-22 10:28:17,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:17,742 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 549 transitions. [2020-12-22 10:28:17,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:17,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:17,743 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:17,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-12-22 10:28:17,944 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:17,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:17,944 INFO L82 PathProgramCache]: Analyzing trace with hash -313323285, now seen corresponding path program 51 times [2020-12-22 10:28:17,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:17,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711707389] [2020-12-22 10:28:17,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:18,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711707389] [2020-12-22 10:28:18,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010255960] [2020-12-22 10:28:18,034 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:18,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:28:18,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:18,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:18,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:18,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:18,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:18,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595297699] [2020-12-22 10:28:18,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:18,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:18,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:18,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:18,252 INFO L87 Difference]: Start difference. First operand 197 states and 549 transitions. Second operand 16 states. [2020-12-22 10:28:18,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:18,537 INFO L93 Difference]: Finished difference Result 276 states and 713 transitions. [2020-12-22 10:28:18,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:28:18,538 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:18,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:18,540 INFO L225 Difference]: With dead ends: 276 [2020-12-22 10:28:18,541 INFO L226 Difference]: Without dead ends: 272 [2020-12-22 10:28:18,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:28:18,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-22 10:28:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 198. [2020-12-22 10:28:18,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 10:28:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 554 transitions. [2020-12-22 10:28:18,545 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 554 transitions. Word has length 13 [2020-12-22 10:28:18,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:18,546 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 554 transitions. [2020-12-22 10:28:18,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:18,546 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 554 transitions. [2020-12-22 10:28:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:18,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:18,546 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:18,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:18,747 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:18,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:18,748 INFO L82 PathProgramCache]: Analyzing trace with hash -313321363, now seen corresponding path program 52 times [2020-12-22 10:28:18,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:18,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209497632] [2020-12-22 10:28:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:18,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209497632] [2020-12-22 10:28:18,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492584422] [2020-12-22 10:28:18,835 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:18,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:18,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:18,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:18,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:19,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:19,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:19,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167582235] [2020-12-22 10:28:19,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:19,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:19,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:19,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:19,063 INFO L87 Difference]: Start difference. First operand 198 states and 554 transitions. Second operand 16 states. [2020-12-22 10:28:19,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:19,546 INFO L93 Difference]: Finished difference Result 289 states and 744 transitions. [2020-12-22 10:28:19,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:28:19,546 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:19,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:19,549 INFO L225 Difference]: With dead ends: 289 [2020-12-22 10:28:19,549 INFO L226 Difference]: Without dead ends: 283 [2020-12-22 10:28:19,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:28:19,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-22 10:28:19,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 198. [2020-12-22 10:28:19,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 10:28:19,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 553 transitions. [2020-12-22 10:28:19,554 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 553 transitions. Word has length 13 [2020-12-22 10:28:19,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:19,554 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 553 transitions. [2020-12-22 10:28:19,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:19,554 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 553 transitions. [2020-12-22 10:28:19,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:19,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:19,555 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:19,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-22 10:28:19,769 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:19,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:19,769 INFO L82 PathProgramCache]: Analyzing trace with hash -312717855, now seen corresponding path program 53 times [2020-12-22 10:28:19,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:19,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610895315] [2020-12-22 10:28:19,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:19,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610895315] [2020-12-22 10:28:19,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903892122] [2020-12-22 10:28:19,869 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:19,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:28:19,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:19,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:19,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:20,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:20,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:20,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770321804] [2020-12-22 10:28:20,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:20,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:20,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:20,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:20,098 INFO L87 Difference]: Start difference. First operand 198 states and 553 transitions. Second operand 16 states. [2020-12-22 10:28:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:20,459 INFO L93 Difference]: Finished difference Result 266 states and 691 transitions. [2020-12-22 10:28:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:28:20,460 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:20,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:20,461 INFO L225 Difference]: With dead ends: 266 [2020-12-22 10:28:20,461 INFO L226 Difference]: Without dead ends: 262 [2020-12-22 10:28:20,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:28:20,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-22 10:28:20,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 200. [2020-12-22 10:28:20,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-22 10:28:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 560 transitions. [2020-12-22 10:28:20,467 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 560 transitions. Word has length 13 [2020-12-22 10:28:20,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:20,467 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 560 transitions. [2020-12-22 10:28:20,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:20,467 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 560 transitions. [2020-12-22 10:28:20,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:20,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:20,468 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:20,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:20,683 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:20,683 INFO L82 PathProgramCache]: Analyzing trace with hash -312698387, now seen corresponding path program 54 times [2020-12-22 10:28:20,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:20,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564152594] [2020-12-22 10:28:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:20,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564152594] [2020-12-22 10:28:20,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010229369] [2020-12-22 10:28:20,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:20,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:28:20,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:20,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:28:20,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:20,984 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:21,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:21,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:21,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351178652] [2020-12-22 10:28:21,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:21,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:21,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:21,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:21,007 INFO L87 Difference]: Start difference. First operand 200 states and 560 transitions. Second operand 16 states. [2020-12-22 10:28:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:21,504 INFO L93 Difference]: Finished difference Result 307 states and 797 transitions. [2020-12-22 10:28:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:28:21,504 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:21,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:21,506 INFO L225 Difference]: With dead ends: 307 [2020-12-22 10:28:21,506 INFO L226 Difference]: Without dead ends: 287 [2020-12-22 10:28:21,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:28:21,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-22 10:28:21,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 197. [2020-12-22 10:28:21,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-22 10:28:21,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 546 transitions. [2020-12-22 10:28:21,513 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 546 transitions. Word has length 13 [2020-12-22 10:28:21,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:21,513 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 546 transitions. [2020-12-22 10:28:21,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:21,513 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 546 transitions. [2020-12-22 10:28:21,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:21,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:21,514 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:21,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-22 10:28:21,728 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:21,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:21,729 INFO L82 PathProgramCache]: Analyzing trace with hash -312658273, now seen corresponding path program 55 times [2020-12-22 10:28:21,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:21,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124922351] [2020-12-22 10:28:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:21,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124922351] [2020-12-22 10:28:21,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271102281] [2020-12-22 10:28:21,816 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:21,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:21,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:22,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:22,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:22,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250419892] [2020-12-22 10:28:22,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:22,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:22,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:22,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:22,040 INFO L87 Difference]: Start difference. First operand 197 states and 546 transitions. Second operand 16 states. [2020-12-22 10:28:22,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:22,615 INFO L93 Difference]: Finished difference Result 288 states and 746 transitions. [2020-12-22 10:28:22,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:28:22,616 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:22,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:22,617 INFO L225 Difference]: With dead ends: 288 [2020-12-22 10:28:22,617 INFO L226 Difference]: Without dead ends: 282 [2020-12-22 10:28:22,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=607, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:28:22,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-22 10:28:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 200. [2020-12-22 10:28:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-22 10:28:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 558 transitions. [2020-12-22 10:28:22,622 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 558 transitions. Word has length 13 [2020-12-22 10:28:22,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:22,622 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 558 transitions. [2020-12-22 10:28:22,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:22,622 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 558 transitions. [2020-12-22 10:28:22,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:22,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:22,624 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:22,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:22,829 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:22,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:22,829 INFO L82 PathProgramCache]: Analyzing trace with hash -312638805, now seen corresponding path program 56 times [2020-12-22 10:28:22,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:22,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946386660] [2020-12-22 10:28:22,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:22,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946386660] [2020-12-22 10:28:22,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839741421] [2020-12-22 10:28:22,928 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:22,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:22,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:22,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:22,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:23,142 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:23,144 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:28:23,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:23,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:23,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:23,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574564204] [2020-12-22 10:28:23,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:23,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:23,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:23,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:23,179 INFO L87 Difference]: Start difference. First operand 200 states and 558 transitions. Second operand 16 states. [2020-12-22 10:28:24,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:24,067 INFO L93 Difference]: Finished difference Result 358 states and 919 transitions. [2020-12-22 10:28:24,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:28:24,068 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:24,071 INFO L225 Difference]: With dead ends: 358 [2020-12-22 10:28:24,071 INFO L226 Difference]: Without dead ends: 340 [2020-12-22 10:28:24,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=393, Invalid=939, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 10:28:24,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-12-22 10:28:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 196. [2020-12-22 10:28:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-22 10:28:24,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 542 transitions. [2020-12-22 10:28:24,077 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 542 transitions. Word has length 13 [2020-12-22 10:28:24,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:24,078 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 542 transitions. [2020-12-22 10:28:24,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 542 transitions. [2020-12-22 10:28:24,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:24,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:24,079 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:24,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:24,295 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:24,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:24,296 INFO L82 PathProgramCache]: Analyzing trace with hash -274773731, now seen corresponding path program 57 times [2020-12-22 10:28:24,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:24,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098829606] [2020-12-22 10:28:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:24,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098829606] [2020-12-22 10:28:24,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707797147] [2020-12-22 10:28:24,390 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:24,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:28:24,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:24,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:24,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:24,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:24,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:24,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886098022] [2020-12-22 10:28:24,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:24,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:24,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:24,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:24,624 INFO L87 Difference]: Start difference. First operand 196 states and 542 transitions. Second operand 16 states. [2020-12-22 10:28:24,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:24,857 INFO L93 Difference]: Finished difference Result 269 states and 705 transitions. [2020-12-22 10:28:24,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:28:24,858 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:24,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:24,860 INFO L225 Difference]: With dead ends: 269 [2020-12-22 10:28:24,860 INFO L226 Difference]: Without dead ends: 263 [2020-12-22 10:28:24,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:28:24,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-22 10:28:24,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 194. [2020-12-22 10:28:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-22 10:28:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 537 transitions. [2020-12-22 10:28:24,866 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 537 transitions. Word has length 13 [2020-12-22 10:28:24,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:24,866 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 537 transitions. [2020-12-22 10:28:24,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:24,866 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 537 transitions. [2020-12-22 10:28:24,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:24,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:24,867 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:25,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-22 10:28:25,082 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:25,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:25,082 INFO L82 PathProgramCache]: Analyzing trace with hash -254217941, now seen corresponding path program 58 times [2020-12-22 10:28:25,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:25,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48412638] [2020-12-22 10:28:25,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:25,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48412638] [2020-12-22 10:28:25,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950620567] [2020-12-22 10:28:25,164 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:25,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:25,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:25,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:25,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:25,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:25,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:25,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775664052] [2020-12-22 10:28:25,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:25,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:25,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:25,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:25,387 INFO L87 Difference]: Start difference. First operand 194 states and 537 transitions. Second operand 16 states. [2020-12-22 10:28:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:25,653 INFO L93 Difference]: Finished difference Result 266 states and 697 transitions. [2020-12-22 10:28:25,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:28:25,654 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:25,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:25,656 INFO L225 Difference]: With dead ends: 266 [2020-12-22 10:28:25,656 INFO L226 Difference]: Without dead ends: 260 [2020-12-22 10:28:25,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:28:25,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-22 10:28:25,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 192. [2020-12-22 10:28:25,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-22 10:28:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 532 transitions. [2020-12-22 10:28:25,661 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 532 transitions. Word has length 13 [2020-12-22 10:28:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:25,661 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 532 transitions. [2020-12-22 10:28:25,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 532 transitions. [2020-12-22 10:28:25,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:25,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:25,662 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:25,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:25,864 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:25,864 INFO L82 PathProgramCache]: Analyzing trace with hash -253612511, now seen corresponding path program 59 times [2020-12-22 10:28:25,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:25,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372102057] [2020-12-22 10:28:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:25,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372102057] [2020-12-22 10:28:25,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629456325] [2020-12-22 10:28:25,951 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:26,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:28:26,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:26,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:26,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:26,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:26,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:26,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334290803] [2020-12-22 10:28:26,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:26,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:26,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:26,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:26,192 INFO L87 Difference]: Start difference. First operand 192 states and 532 transitions. Second operand 16 states. [2020-12-22 10:28:26,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:26,505 INFO L93 Difference]: Finished difference Result 261 states and 686 transitions. [2020-12-22 10:28:26,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:28:26,506 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:26,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:26,508 INFO L225 Difference]: With dead ends: 261 [2020-12-22 10:28:26,508 INFO L226 Difference]: Without dead ends: 255 [2020-12-22 10:28:26,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:28:26,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-12-22 10:28:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 194. [2020-12-22 10:28:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-22 10:28:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 539 transitions. [2020-12-22 10:28:26,516 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 539 transitions. Word has length 13 [2020-12-22 10:28:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:26,516 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 539 transitions. [2020-12-22 10:28:26,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 539 transitions. [2020-12-22 10:28:26,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:26,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:26,517 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:26,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:26,732 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:26,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:26,732 INFO L82 PathProgramCache]: Analyzing trace with hash -253593043, now seen corresponding path program 60 times [2020-12-22 10:28:26,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:26,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103710724] [2020-12-22 10:28:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:26,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103710724] [2020-12-22 10:28:26,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970993488] [2020-12-22 10:28:26,821 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:26,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:28:26,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:26,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:26,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:27,022 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:27,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:27,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:27,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133539511] [2020-12-22 10:28:27,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:27,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:27,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:27,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:27,051 INFO L87 Difference]: Start difference. First operand 194 states and 539 transitions. Second operand 16 states. [2020-12-22 10:28:27,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:27,555 INFO L93 Difference]: Finished difference Result 334 states and 855 transitions. [2020-12-22 10:28:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:28:27,555 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:27,557 INFO L225 Difference]: With dead ends: 334 [2020-12-22 10:28:27,558 INFO L226 Difference]: Without dead ends: 316 [2020-12-22 10:28:27,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:28:27,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-12-22 10:28:27,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 194. [2020-12-22 10:28:27,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-22 10:28:27,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 540 transitions. [2020-12-22 10:28:27,561 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 540 transitions. Word has length 13 [2020-12-22 10:28:27,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:27,562 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 540 transitions. [2020-12-22 10:28:27,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:27,562 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 540 transitions. [2020-12-22 10:28:27,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:27,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:27,562 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:27,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-22 10:28:27,777 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:27,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1536124564, now seen corresponding path program 11 times [2020-12-22 10:28:27,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:27,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945633562] [2020-12-22 10:28:27,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:27,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945633562] [2020-12-22 10:28:27,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978888190] [2020-12-22 10:28:27,820 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:27,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 10:28:27,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:27,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 10:28:27,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:27,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 10:28:27,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-12-22 10:28:27,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682455049] [2020-12-22 10:28:27,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:28:27,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:27,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:28:27,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:28:27,897 INFO L87 Difference]: Start difference. First operand 194 states and 540 transitions. Second operand 8 states. [2020-12-22 10:28:27,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:27,922 INFO L93 Difference]: Finished difference Result 275 states and 749 transitions. [2020-12-22 10:28:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:28:27,923 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-22 10:28:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:27,925 INFO L225 Difference]: With dead ends: 275 [2020-12-22 10:28:27,925 INFO L226 Difference]: Without dead ends: 252 [2020-12-22 10:28:27,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:28:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-12-22 10:28:27,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2020-12-22 10:28:27,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-12-22 10:28:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 697 transitions. [2020-12-22 10:28:27,930 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 697 transitions. Word has length 13 [2020-12-22 10:28:27,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:27,930 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 697 transitions. [2020-12-22 10:28:27,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:28:27,930 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 697 transitions. [2020-12-22 10:28:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:27,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:27,931 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:28,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:28,138 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:28,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:28,138 INFO L82 PathProgramCache]: Analyzing trace with hash -2009124029, now seen corresponding path program 61 times [2020-12-22 10:28:28,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:28,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346179252] [2020-12-22 10:28:28,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:28,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346179252] [2020-12-22 10:28:28,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775116982] [2020-12-22 10:28:28,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:28,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:28,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:28,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:28,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:28,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319501876] [2020-12-22 10:28:28,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:28,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:28,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:28,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:28,494 INFO L87 Difference]: Start difference. First operand 252 states and 697 transitions. Second operand 17 states. [2020-12-22 10:28:28,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:28,705 INFO L93 Difference]: Finished difference Result 278 states and 748 transitions. [2020-12-22 10:28:28,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:28:28,705 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:28,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:28,707 INFO L225 Difference]: With dead ends: 278 [2020-12-22 10:28:28,707 INFO L226 Difference]: Without dead ends: 276 [2020-12-22 10:28:28,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:28:28,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-12-22 10:28:28,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 252. [2020-12-22 10:28:28,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-12-22 10:28:28,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 697 transitions. [2020-12-22 10:28:28,714 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 697 transitions. Word has length 14 [2020-12-22 10:28:28,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:28,714 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 697 transitions. [2020-12-22 10:28:28,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 697 transitions. [2020-12-22 10:28:28,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:28,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:28,715 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:28,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-12-22 10:28:28,930 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:28,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:28,931 INFO L82 PathProgramCache]: Analyzing trace with hash -2008843169, now seen corresponding path program 62 times [2020-12-22 10:28:28,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:28,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691093218] [2020-12-22 10:28:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:29,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691093218] [2020-12-22 10:28:29,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810495453] [2020-12-22 10:28:29,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:29,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:29,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:29,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:28:29,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:29,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:29,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-12-22 10:28:29,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996723202] [2020-12-22 10:28:29,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:28:29,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:29,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:28:29,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:28:29,186 INFO L87 Difference]: Start difference. First operand 252 states and 697 transitions. Second operand 13 states. [2020-12-22 10:28:29,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:29,514 INFO L93 Difference]: Finished difference Result 355 states and 917 transitions. [2020-12-22 10:28:29,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:28:29,515 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2020-12-22 10:28:29,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:29,517 INFO L225 Difference]: With dead ends: 355 [2020-12-22 10:28:29,517 INFO L226 Difference]: Without dead ends: 347 [2020-12-22 10:28:29,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:28:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-12-22 10:28:29,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 249. [2020-12-22 10:28:29,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-12-22 10:28:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 697 transitions. [2020-12-22 10:28:29,522 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 697 transitions. Word has length 14 [2020-12-22 10:28:29,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:29,523 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 697 transitions. [2020-12-22 10:28:29,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:28:29,523 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 697 transitions. [2020-12-22 10:28:29,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:29,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:29,524 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:29,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-22 10:28:29,738 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:29,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1147189887, now seen corresponding path program 63 times [2020-12-22 10:28:29,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:29,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108258674] [2020-12-22 10:28:29,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:29,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108258674] [2020-12-22 10:28:29,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976281937] [2020-12-22 10:28:29,852 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:29,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:28:29,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:29,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:29,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:30,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:30,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:30,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589539785] [2020-12-22 10:28:30,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:30,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:30,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:30,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:30,185 INFO L87 Difference]: Start difference. First operand 249 states and 697 transitions. Second operand 17 states. [2020-12-22 10:28:30,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:30,553 INFO L93 Difference]: Finished difference Result 341 states and 889 transitions. [2020-12-22 10:28:30,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:28:30,554 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:30,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:30,556 INFO L225 Difference]: With dead ends: 341 [2020-12-22 10:28:30,557 INFO L226 Difference]: Without dead ends: 337 [2020-12-22 10:28:30,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:28:30,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-12-22 10:28:30,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 254. [2020-12-22 10:28:30,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-12-22 10:28:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 706 transitions. [2020-12-22 10:28:30,563 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 706 transitions. Word has length 14 [2020-12-22 10:28:30,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:30,563 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 706 transitions. [2020-12-22 10:28:30,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:30,564 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 706 transitions. [2020-12-22 10:28:30,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:30,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:30,564 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:30,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-22 10:28:30,779 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:30,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:30,779 INFO L82 PathProgramCache]: Analyzing trace with hash -877283427, now seen corresponding path program 64 times [2020-12-22 10:28:30,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:30,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440978855] [2020-12-22 10:28:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:30,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440978855] [2020-12-22 10:28:30,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403747414] [2020-12-22 10:28:30,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:30,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:30,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:30,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:30,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:31,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:31,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:31,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043263510] [2020-12-22 10:28:31,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:31,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:31,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:31,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:31,200 INFO L87 Difference]: Start difference. First operand 254 states and 706 transitions. Second operand 17 states. [2020-12-22 10:28:31,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:31,654 INFO L93 Difference]: Finished difference Result 349 states and 902 transitions. [2020-12-22 10:28:31,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:28:31,655 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:31,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:31,659 INFO L225 Difference]: With dead ends: 349 [2020-12-22 10:28:31,659 INFO L226 Difference]: Without dead ends: 345 [2020-12-22 10:28:31,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:28:31,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-12-22 10:28:31,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 256. [2020-12-22 10:28:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-12-22 10:28:31,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 713 transitions. [2020-12-22 10:28:31,666 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 713 transitions. Word has length 14 [2020-12-22 10:28:31,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:31,667 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 713 transitions. [2020-12-22 10:28:31,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:31,667 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 713 transitions. [2020-12-22 10:28:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:31,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:31,668 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:31,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:31,882 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:31,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:31,882 INFO L82 PathProgramCache]: Analyzing trace with hash -876677997, now seen corresponding path program 65 times [2020-12-22 10:28:31,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:31,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988936336] [2020-12-22 10:28:31,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:31,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988936336] [2020-12-22 10:28:31,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019303538] [2020-12-22 10:28:31,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:32,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:28:32,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:32,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:32,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:32,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:32,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:32,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848294484] [2020-12-22 10:28:32,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:32,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:32,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:32,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:32,287 INFO L87 Difference]: Start difference. First operand 256 states and 713 transitions. Second operand 17 states. [2020-12-22 10:28:32,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:32,846 INFO L93 Difference]: Finished difference Result 352 states and 916 transitions. [2020-12-22 10:28:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:28:32,846 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:32,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:32,849 INFO L225 Difference]: With dead ends: 352 [2020-12-22 10:28:32,850 INFO L226 Difference]: Without dead ends: 348 [2020-12-22 10:28:32,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:28:32,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-12-22 10:28:32,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 260. [2020-12-22 10:28:32,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-12-22 10:28:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 727 transitions. [2020-12-22 10:28:32,856 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 727 transitions. Word has length 14 [2020-12-22 10:28:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:32,856 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 727 transitions. [2020-12-22 10:28:32,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:32,857 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 727 transitions. [2020-12-22 10:28:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:32,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:32,857 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:33,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:33,073 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:33,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:33,073 INFO L82 PathProgramCache]: Analyzing trace with hash -876658529, now seen corresponding path program 66 times [2020-12-22 10:28:33,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:33,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169447442] [2020-12-22 10:28:33,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:33,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169447442] [2020-12-22 10:28:33,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951710417] [2020-12-22 10:28:33,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:33,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:28:33,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:33,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:33,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:33,427 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:33,429 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:28:33,430 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:33,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:33,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:28:33,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902511652] [2020-12-22 10:28:33,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:28:33,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:33,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:28:33,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:28:33,459 INFO L87 Difference]: Start difference. First operand 260 states and 727 transitions. Second operand 18 states. [2020-12-22 10:28:34,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:34,306 INFO L93 Difference]: Finished difference Result 398 states and 1026 transitions. [2020-12-22 10:28:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:28:34,307 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:28:34,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:34,310 INFO L225 Difference]: With dead ends: 398 [2020-12-22 10:28:34,310 INFO L226 Difference]: Without dead ends: 383 [2020-12-22 10:28:34,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=442, Invalid=964, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:28:34,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-12-22 10:28:34,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 253. [2020-12-22 10:28:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-12-22 10:28:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 711 transitions. [2020-12-22 10:28:34,317 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 711 transitions. Word has length 14 [2020-12-22 10:28:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:34,317 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 711 transitions. [2020-12-22 10:28:34,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:28:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 711 transitions. [2020-12-22 10:28:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:34,318 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:34,318 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:34,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:34,523 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:34,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:34,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1434687085, now seen corresponding path program 67 times [2020-12-22 10:28:34,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:34,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572834150] [2020-12-22 10:28:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:34,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572834150] [2020-12-22 10:28:34,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16190999] [2020-12-22 10:28:34,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:34,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:34,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:34,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:34,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:34,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781290994] [2020-12-22 10:28:34,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:34,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:34,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:34,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:34,937 INFO L87 Difference]: Start difference. First operand 253 states and 711 transitions. Second operand 17 states. [2020-12-22 10:28:35,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:35,399 INFO L93 Difference]: Finished difference Result 371 states and 961 transitions. [2020-12-22 10:28:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:28:35,400 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:35,402 INFO L225 Difference]: With dead ends: 371 [2020-12-22 10:28:35,402 INFO L226 Difference]: Without dead ends: 366 [2020-12-22 10:28:35,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:28:35,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-12-22 10:28:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 260. [2020-12-22 10:28:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-12-22 10:28:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 726 transitions. [2020-12-22 10:28:35,410 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 726 transitions. Word has length 14 [2020-12-22 10:28:35,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:35,411 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 726 transitions. [2020-12-22 10:28:35,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:35,411 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 726 transitions. [2020-12-22 10:28:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:35,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:35,412 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:35,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:35,616 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:35,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:35,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1434629425, now seen corresponding path program 68 times [2020-12-22 10:28:35,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:35,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323451967] [2020-12-22 10:28:35,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:35,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323451967] [2020-12-22 10:28:35,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451668251] [2020-12-22 10:28:35,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:35,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:35,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:35,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:35,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:36,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:36,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:36,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709246505] [2020-12-22 10:28:36,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:36,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:36,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:36,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:36,048 INFO L87 Difference]: Start difference. First operand 260 states and 726 transitions. Second operand 17 states. [2020-12-22 10:28:36,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:36,522 INFO L93 Difference]: Finished difference Result 358 states and 933 transitions. [2020-12-22 10:28:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:28:36,523 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:36,524 INFO L225 Difference]: With dead ends: 358 [2020-12-22 10:28:36,525 INFO L226 Difference]: Without dead ends: 354 [2020-12-22 10:28:36,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:28:36,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-12-22 10:28:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 260. [2020-12-22 10:28:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-12-22 10:28:36,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 726 transitions. [2020-12-22 10:28:36,533 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 726 transitions. Word has length 14 [2020-12-22 10:28:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:36,533 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 726 transitions. [2020-12-22 10:28:36,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:36,533 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 726 transitions. [2020-12-22 10:28:36,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:36,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:36,534 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:36,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-12-22 10:28:36,747 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:36,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:36,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1657521417, now seen corresponding path program 69 times [2020-12-22 10:28:36,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:36,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516463259] [2020-12-22 10:28:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:36,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516463259] [2020-12-22 10:28:36,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851766389] [2020-12-22 10:28:36,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:36,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:28:36,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:36,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:36,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:37,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:37,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:37,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712941055] [2020-12-22 10:28:37,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:37,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:37,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:37,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:37,177 INFO L87 Difference]: Start difference. First operand 260 states and 726 transitions. Second operand 17 states. [2020-12-22 10:28:37,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:37,624 INFO L93 Difference]: Finished difference Result 372 states and 966 transitions. [2020-12-22 10:28:37,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:28:37,625 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:37,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:37,627 INFO L225 Difference]: With dead ends: 372 [2020-12-22 10:28:37,627 INFO L226 Difference]: Without dead ends: 367 [2020-12-22 10:28:37,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:28:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-12-22 10:28:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 262. [2020-12-22 10:28:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-22 10:28:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 731 transitions. [2020-12-22 10:28:37,633 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 731 transitions. Word has length 14 [2020-12-22 10:28:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:37,634 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 731 transitions. [2020-12-22 10:28:37,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 731 transitions. [2020-12-22 10:28:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:37,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:37,635 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:37,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:37,836 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:37,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:37,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1657463757, now seen corresponding path program 70 times [2020-12-22 10:28:37,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:37,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458362772] [2020-12-22 10:28:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:37,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458362772] [2020-12-22 10:28:37,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362743835] [2020-12-22 10:28:37,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:38,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:38,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:38,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:38,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:38,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:38,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:38,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957806804] [2020-12-22 10:28:38,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:38,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:38,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:38,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:38,248 INFO L87 Difference]: Start difference. First operand 262 states and 731 transitions. Second operand 17 states. [2020-12-22 10:28:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:38,718 INFO L93 Difference]: Finished difference Result 356 states and 929 transitions. [2020-12-22 10:28:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:28:38,719 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:38,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:38,720 INFO L225 Difference]: With dead ends: 356 [2020-12-22 10:28:38,720 INFO L226 Difference]: Without dead ends: 352 [2020-12-22 10:28:38,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:28:38,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-12-22 10:28:38,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 260. [2020-12-22 10:28:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-12-22 10:28:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 725 transitions. [2020-12-22 10:28:38,726 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 725 transitions. Word has length 14 [2020-12-22 10:28:38,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:38,726 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 725 transitions. [2020-12-22 10:28:38,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:38,726 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 725 transitions. [2020-12-22 10:28:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:38,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:38,727 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:38,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:38,931 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:38,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:38,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1638753087, now seen corresponding path program 71 times [2020-12-22 10:28:38,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:38,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044167913] [2020-12-22 10:28:38,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:39,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044167913] [2020-12-22 10:28:39,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927841070] [2020-12-22 10:28:39,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:39,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:39,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:39,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:39,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:39,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:39,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:39,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610693877] [2020-12-22 10:28:39,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:39,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:39,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:39,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:39,361 INFO L87 Difference]: Start difference. First operand 260 states and 725 transitions. Second operand 17 states. [2020-12-22 10:28:40,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:40,030 INFO L93 Difference]: Finished difference Result 387 states and 993 transitions. [2020-12-22 10:28:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:28:40,031 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:40,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:40,033 INFO L225 Difference]: With dead ends: 387 [2020-12-22 10:28:40,033 INFO L226 Difference]: Without dead ends: 382 [2020-12-22 10:28:40,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=257, Invalid=613, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:28:40,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-12-22 10:28:40,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 265. [2020-12-22 10:28:40,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-12-22 10:28:40,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 741 transitions. [2020-12-22 10:28:40,041 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 741 transitions. Word has length 14 [2020-12-22 10:28:40,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:40,041 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 741 transitions. [2020-12-22 10:28:40,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:40,041 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 741 transitions. [2020-12-22 10:28:40,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:40,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:40,042 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:40,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:40,258 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:40,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:40,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1638089997, now seen corresponding path program 72 times [2020-12-22 10:28:40,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:40,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835541829] [2020-12-22 10:28:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:40,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835541829] [2020-12-22 10:28:40,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771856776] [2020-12-22 10:28:40,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:40,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:28:40,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:40,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:40,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:40,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:40,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:40,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101412346] [2020-12-22 10:28:40,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:40,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:40,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:40,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:40,699 INFO L87 Difference]: Start difference. First operand 265 states and 741 transitions. Second operand 17 states. [2020-12-22 10:28:41,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:41,470 INFO L93 Difference]: Finished difference Result 392 states and 1018 transitions. [2020-12-22 10:28:41,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:28:41,471 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:41,472 INFO L225 Difference]: With dead ends: 392 [2020-12-22 10:28:41,472 INFO L226 Difference]: Without dead ends: 387 [2020-12-22 10:28:41,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=322, Invalid=734, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:28:41,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-12-22 10:28:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 269. [2020-12-22 10:28:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-22 10:28:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 755 transitions. [2020-12-22 10:28:41,478 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 755 transitions. Word has length 14 [2020-12-22 10:28:41,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:41,478 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 755 transitions. [2020-12-22 10:28:41,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 755 transitions. [2020-12-22 10:28:41,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:41,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:41,479 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:41,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:41,680 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:41,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1638070529, now seen corresponding path program 73 times [2020-12-22 10:28:41,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:41,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580380002] [2020-12-22 10:28:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:41,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580380002] [2020-12-22 10:28:41,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852066835] [2020-12-22 10:28:41,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:41,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:41,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:42,077 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:42,079 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:28:42,080 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:42,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:42,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:42,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721602490] [2020-12-22 10:28:42,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:42,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:42,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:42,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:42,100 INFO L87 Difference]: Start difference. First operand 269 states and 755 transitions. Second operand 17 states. [2020-12-22 10:28:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:43,077 INFO L93 Difference]: Finished difference Result 420 states and 1087 transitions. [2020-12-22 10:28:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:28:43,078 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:43,079 INFO L225 Difference]: With dead ends: 420 [2020-12-22 10:28:43,080 INFO L226 Difference]: Without dead ends: 406 [2020-12-22 10:28:43,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=436, Invalid=970, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:28:43,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-12-22 10:28:43,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 271. [2020-12-22 10:28:43,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-22 10:28:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 763 transitions. [2020-12-22 10:28:43,088 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 763 transitions. Word has length 14 [2020-12-22 10:28:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:43,088 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 763 transitions. [2020-12-22 10:28:43,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:43,089 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 763 transitions. [2020-12-22 10:28:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:43,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:43,089 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:43,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-12-22 10:28:43,303 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:43,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:43,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1638068607, now seen corresponding path program 74 times [2020-12-22 10:28:43,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:43,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102500385] [2020-12-22 10:28:43,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:43,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102500385] [2020-12-22 10:28:43,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303326540] [2020-12-22 10:28:43,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:43,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:43,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:43,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:43,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:43,670 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:28:43,672 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:28:43,674 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:43,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:43,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:28:43,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967107602] [2020-12-22 10:28:43,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:28:43,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:43,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:28:43,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:28:43,701 INFO L87 Difference]: Start difference. First operand 271 states and 763 transitions. Second operand 18 states. [2020-12-22 10:28:44,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:44,795 INFO L93 Difference]: Finished difference Result 503 states and 1290 transitions. [2020-12-22 10:28:44,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 10:28:44,796 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:28:44,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:44,797 INFO L225 Difference]: With dead ends: 503 [2020-12-22 10:28:44,797 INFO L226 Difference]: Without dead ends: 487 [2020-12-22 10:28:44,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=495, Invalid=1227, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 10:28:44,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2020-12-22 10:28:44,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 267. [2020-12-22 10:28:44,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-22 10:28:44,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 768 transitions. [2020-12-22 10:28:44,805 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 768 transitions. Word has length 14 [2020-12-22 10:28:44,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:44,805 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 768 transitions. [2020-12-22 10:28:44,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:28:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 768 transitions. [2020-12-22 10:28:44,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:44,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:44,806 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:45,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-12-22 10:28:45,015 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:45,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:45,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1636907967, now seen corresponding path program 75 times [2020-12-22 10:28:45,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:45,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994874519] [2020-12-22 10:28:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:45,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994874519] [2020-12-22 10:28:45,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193616561] [2020-12-22 10:28:45,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:45,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:28:45,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:45,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:45,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:45,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:45,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:45,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481235076] [2020-12-22 10:28:45,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:45,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:45,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:45,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:45,411 INFO L87 Difference]: Start difference. First operand 267 states and 768 transitions. Second operand 17 states. [2020-12-22 10:28:46,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:46,042 INFO L93 Difference]: Finished difference Result 384 states and 1015 transitions. [2020-12-22 10:28:46,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:28:46,043 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:46,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:46,044 INFO L225 Difference]: With dead ends: 384 [2020-12-22 10:28:46,044 INFO L226 Difference]: Without dead ends: 380 [2020-12-22 10:28:46,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:28:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-12-22 10:28:46,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 266. [2020-12-22 10:28:46,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-12-22 10:28:46,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 765 transitions. [2020-12-22 10:28:46,051 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 765 transitions. Word has length 14 [2020-12-22 10:28:46,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:46,052 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 765 transitions. [2020-12-22 10:28:46,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:46,052 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 765 transitions. [2020-12-22 10:28:46,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:46,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:46,053 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:46,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:46,266 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:46,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:46,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1636302537, now seen corresponding path program 76 times [2020-12-22 10:28:46,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:46,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641015935] [2020-12-22 10:28:46,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:46,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641015935] [2020-12-22 10:28:46,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031540276] [2020-12-22 10:28:46,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:46,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:46,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:46,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:46,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:46,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:46,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:46,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923025589] [2020-12-22 10:28:46,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:46,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:46,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:46,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:46,724 INFO L87 Difference]: Start difference. First operand 266 states and 765 transitions. Second operand 17 states. [2020-12-22 10:28:47,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:47,492 INFO L93 Difference]: Finished difference Result 380 states and 1002 transitions. [2020-12-22 10:28:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:28:47,493 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:47,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:47,494 INFO L225 Difference]: With dead ends: 380 [2020-12-22 10:28:47,494 INFO L226 Difference]: Without dead ends: 376 [2020-12-22 10:28:47,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:28:47,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-12-22 10:28:47,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 267. [2020-12-22 10:28:47,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-22 10:28:47,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 767 transitions. [2020-12-22 10:28:47,501 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 767 transitions. Word has length 14 [2020-12-22 10:28:47,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:47,501 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 767 transitions. [2020-12-22 10:28:47,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 767 transitions. [2020-12-22 10:28:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:47,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:47,502 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:47,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:47,707 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:47,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:47,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1636281147, now seen corresponding path program 77 times [2020-12-22 10:28:47,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:47,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718213136] [2020-12-22 10:28:47,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:47,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718213136] [2020-12-22 10:28:47,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312191354] [2020-12-22 10:28:47,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:47,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:28:47,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:47,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:47,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:48,156 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:28:48,159 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:28:48,162 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:28:48,164 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:48,166 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:48,167 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:28:48,170 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:28:48,173 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:48,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:48,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:28:48,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631152989] [2020-12-22 10:28:48,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:28:48,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:48,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:28:48,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:28:48,235 INFO L87 Difference]: Start difference. First operand 267 states and 767 transitions. Second operand 18 states. [2020-12-22 10:28:49,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:49,560 INFO L93 Difference]: Finished difference Result 491 states and 1283 transitions. [2020-12-22 10:28:49,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:28:49,561 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:28:49,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:49,562 INFO L225 Difference]: With dead ends: 491 [2020-12-22 10:28:49,563 INFO L226 Difference]: Without dead ends: 475 [2020-12-22 10:28:49,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=477, Invalid=1163, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:28:49,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-12-22 10:28:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 271. [2020-12-22 10:28:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-22 10:28:49,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 784 transitions. [2020-12-22 10:28:49,571 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 784 transitions. Word has length 14 [2020-12-22 10:28:49,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:49,571 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 784 transitions. [2020-12-22 10:28:49,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:28:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 784 transitions. [2020-12-22 10:28:49,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:49,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:49,572 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:49,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:49,786 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:49,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1757227135, now seen corresponding path program 78 times [2020-12-22 10:28:49,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:49,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636496888] [2020-12-22 10:28:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:49,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636496888] [2020-12-22 10:28:49,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120896493] [2020-12-22 10:28:49,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:49,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:28:49,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:49,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:49,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:50,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:50,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:50,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369821765] [2020-12-22 10:28:50,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:50,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:50,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:50,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:50,164 INFO L87 Difference]: Start difference. First operand 271 states and 784 transitions. Second operand 17 states. [2020-12-22 10:28:50,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:50,652 INFO L93 Difference]: Finished difference Result 364 states and 975 transitions. [2020-12-22 10:28:50,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:28:50,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:50,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:50,654 INFO L225 Difference]: With dead ends: 364 [2020-12-22 10:28:50,654 INFO L226 Difference]: Without dead ends: 361 [2020-12-22 10:28:50,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:28:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-12-22 10:28:50,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 273. [2020-12-22 10:28:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-12-22 10:28:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 790 transitions. [2020-12-22 10:28:50,660 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 790 transitions. Word has length 14 [2020-12-22 10:28:50,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:50,660 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 790 transitions. [2020-12-22 10:28:50,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 790 transitions. [2020-12-22 10:28:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:50,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:50,661 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:50,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:50,862 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:50,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:50,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1757225213, now seen corresponding path program 79 times [2020-12-22 10:28:50,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:50,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589524062] [2020-12-22 10:28:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:51,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589524062] [2020-12-22 10:28:51,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154068509] [2020-12-22 10:28:51,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:51,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:51,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:51,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:51,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:51,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200010866] [2020-12-22 10:28:51,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:51,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:51,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:51,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:51,296 INFO L87 Difference]: Start difference. First operand 273 states and 790 transitions. Second operand 17 states. [2020-12-22 10:28:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:51,865 INFO L93 Difference]: Finished difference Result 383 states and 1015 transitions. [2020-12-22 10:28:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:28:51,866 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:51,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:51,868 INFO L225 Difference]: With dead ends: 383 [2020-12-22 10:28:51,868 INFO L226 Difference]: Without dead ends: 379 [2020-12-22 10:28:51,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:28:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-12-22 10:28:51,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 274. [2020-12-22 10:28:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-12-22 10:28:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 793 transitions. [2020-12-22 10:28:51,875 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 793 transitions. Word has length 14 [2020-12-22 10:28:51,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:51,875 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 793 transitions. [2020-12-22 10:28:51,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:51,875 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 793 transitions. [2020-12-22 10:28:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:51,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:51,876 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:52,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:52,077 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:52,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:52,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1755380093, now seen corresponding path program 80 times [2020-12-22 10:28:52,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:52,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312230093] [2020-12-22 10:28:52,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:52,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312230093] [2020-12-22 10:28:52,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003031473] [2020-12-22 10:28:52,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:52,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:52,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:52,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:52,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:52,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:52,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:52,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826471415] [2020-12-22 10:28:52,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:52,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:52,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:52,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:52,499 INFO L87 Difference]: Start difference. First operand 274 states and 793 transitions. Second operand 17 states. [2020-12-22 10:28:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:53,087 INFO L93 Difference]: Finished difference Result 391 states and 1040 transitions. [2020-12-22 10:28:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:28:53,088 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:53,090 INFO L225 Difference]: With dead ends: 391 [2020-12-22 10:28:53,090 INFO L226 Difference]: Without dead ends: 386 [2020-12-22 10:28:53,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=567, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:28:53,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-12-22 10:28:53,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 275. [2020-12-22 10:28:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-12-22 10:28:53,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 796 transitions. [2020-12-22 10:28:53,097 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 796 transitions. Word has length 14 [2020-12-22 10:28:53,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:53,097 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 796 transitions. [2020-12-22 10:28:53,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 796 transitions. [2020-12-22 10:28:53,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:53,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:53,098 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:53,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:53,299 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:53,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:53,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1755318589, now seen corresponding path program 81 times [2020-12-22 10:28:53,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:53,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429120335] [2020-12-22 10:28:53,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:53,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429120335] [2020-12-22 10:28:53,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393262303] [2020-12-22 10:28:53,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:53,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:28:53,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:53,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:53,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:53,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:53,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:53,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105504174] [2020-12-22 10:28:53,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:53,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:53,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:53,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:53,726 INFO L87 Difference]: Start difference. First operand 275 states and 796 transitions. Second operand 17 states. [2020-12-22 10:28:54,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:54,111 INFO L93 Difference]: Finished difference Result 370 states and 987 transitions. [2020-12-22 10:28:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:28:54,112 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:54,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:54,113 INFO L225 Difference]: With dead ends: 370 [2020-12-22 10:28:54,113 INFO L226 Difference]: Without dead ends: 347 [2020-12-22 10:28:54,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:28:54,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-12-22 10:28:54,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 281. [2020-12-22 10:28:54,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-12-22 10:28:54,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 799 transitions. [2020-12-22 10:28:54,120 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 799 transitions. Word has length 14 [2020-12-22 10:28:54,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:54,120 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 799 transitions. [2020-12-22 10:28:54,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 799 transitions. [2020-12-22 10:28:54,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:54,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:54,120 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:54,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:54,321 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:54,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:54,322 INFO L82 PathProgramCache]: Analyzing trace with hash -75156835, now seen corresponding path program 82 times [2020-12-22 10:28:54,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:54,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846552319] [2020-12-22 10:28:54,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:54,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846552319] [2020-12-22 10:28:54,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170232388] [2020-12-22 10:28:54,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:54,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:54,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:54,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:54,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:54,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:54,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:54,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238399831] [2020-12-22 10:28:54,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:54,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:54,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:54,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:54,703 INFO L87 Difference]: Start difference. First operand 281 states and 799 transitions. Second operand 17 states. [2020-12-22 10:28:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:55,208 INFO L93 Difference]: Finished difference Result 377 states and 998 transitions. [2020-12-22 10:28:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:28:55,209 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:55,210 INFO L225 Difference]: With dead ends: 377 [2020-12-22 10:28:55,210 INFO L226 Difference]: Without dead ends: 374 [2020-12-22 10:28:55,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:28:55,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-12-22 10:28:55,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 282. [2020-12-22 10:28:55,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-12-22 10:28:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 802 transitions. [2020-12-22 10:28:55,216 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 802 transitions. Word has length 14 [2020-12-22 10:28:55,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:55,217 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 802 transitions. [2020-12-22 10:28:55,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 802 transitions. [2020-12-22 10:28:55,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:55,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:55,217 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:55,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-12-22 10:28:55,418 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:55,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:55,419 INFO L82 PathProgramCache]: Analyzing trace with hash -75154913, now seen corresponding path program 83 times [2020-12-22 10:28:55,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:55,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74148816] [2020-12-22 10:28:55,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:55,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74148816] [2020-12-22 10:28:55,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952100861] [2020-12-22 10:28:55,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:55,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:55,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:55,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:55,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:55,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:55,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:55,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317409410] [2020-12-22 10:28:55,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:55,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:55,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:55,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:55,784 INFO L87 Difference]: Start difference. First operand 282 states and 802 transitions. Second operand 17 states. [2020-12-22 10:28:56,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:56,320 INFO L93 Difference]: Finished difference Result 391 states and 1031 transitions. [2020-12-22 10:28:56,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:28:56,321 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:56,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:56,322 INFO L225 Difference]: With dead ends: 391 [2020-12-22 10:28:56,322 INFO L226 Difference]: Without dead ends: 387 [2020-12-22 10:28:56,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:28:56,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-12-22 10:28:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 281. [2020-12-22 10:28:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-12-22 10:28:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 799 transitions. [2020-12-22 10:28:56,329 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 799 transitions. Word has length 14 [2020-12-22 10:28:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:56,329 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 799 transitions. [2020-12-22 10:28:56,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 799 transitions. [2020-12-22 10:28:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:56,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:56,330 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:56,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:56,534 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:56,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:56,535 INFO L82 PathProgramCache]: Analyzing trace with hash -73309793, now seen corresponding path program 84 times [2020-12-22 10:28:56,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:56,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695797147] [2020-12-22 10:28:56,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:56,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695797147] [2020-12-22 10:28:56,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076139820] [2020-12-22 10:28:56,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:56,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:28:56,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:56,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:56,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:56,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:56,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:56,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290384686] [2020-12-22 10:28:56,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:56,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:56,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:56,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:56,957 INFO L87 Difference]: Start difference. First operand 281 states and 799 transitions. Second operand 17 states. [2020-12-22 10:28:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:57,637 INFO L93 Difference]: Finished difference Result 399 states and 1056 transitions. [2020-12-22 10:28:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:28:57,638 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:57,639 INFO L225 Difference]: With dead ends: 399 [2020-12-22 10:28:57,639 INFO L226 Difference]: Without dead ends: 394 [2020-12-22 10:28:57,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:28:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-12-22 10:28:57,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 282. [2020-12-22 10:28:57,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-12-22 10:28:57,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 802 transitions. [2020-12-22 10:28:57,647 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 802 transitions. Word has length 14 [2020-12-22 10:28:57,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:57,647 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 802 transitions. [2020-12-22 10:28:57,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:57,647 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 802 transitions. [2020-12-22 10:28:57,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:57,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:57,648 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:57,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-12-22 10:28:57,851 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:57,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:57,852 INFO L82 PathProgramCache]: Analyzing trace with hash -73248289, now seen corresponding path program 85 times [2020-12-22 10:28:57,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:57,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335897464] [2020-12-22 10:28:57,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:57,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335897464] [2020-12-22 10:28:57,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333712456] [2020-12-22 10:28:57,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:58,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:58,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:58,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:58,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:58,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069047540] [2020-12-22 10:28:58,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:58,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:58,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:58,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:58,262 INFO L87 Difference]: Start difference. First operand 282 states and 802 transitions. Second operand 17 states. [2020-12-22 10:28:58,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:58,650 INFO L93 Difference]: Finished difference Result 366 states and 975 transitions. [2020-12-22 10:28:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:28:58,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:28:58,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:58,652 INFO L225 Difference]: With dead ends: 366 [2020-12-22 10:28:58,652 INFO L226 Difference]: Without dead ends: 350 [2020-12-22 10:28:58,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:28:58,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-12-22 10:28:58,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 281. [2020-12-22 10:28:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-12-22 10:28:58,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 797 transitions. [2020-12-22 10:28:58,658 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 797 transitions. Word has length 14 [2020-12-22 10:28:58,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:58,658 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 797 transitions. [2020-12-22 10:28:58,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:28:58,658 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 797 transitions. [2020-12-22 10:28:58,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:28:58,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:58,659 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:58,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:58,862 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:58,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:58,862 INFO L82 PathProgramCache]: Analyzing trace with hash 506661395, now seen corresponding path program 86 times [2020-12-22 10:28:58,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:58,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932180010] [2020-12-22 10:28:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:58,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932180010] [2020-12-22 10:28:58,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235269992] [2020-12-22 10:28:58,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:59,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:59,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:59,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:59,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:59,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:59,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:28:59,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866479837] [2020-12-22 10:28:59,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:28:59,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:59,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:28:59,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:59,256 INFO L87 Difference]: Start difference. First operand 281 states and 797 transitions. Second operand 17 states. [2020-12-22 10:29:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:00,006 INFO L93 Difference]: Finished difference Result 376 states and 992 transitions. [2020-12-22 10:29:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:29:00,007 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:00,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:00,008 INFO L225 Difference]: With dead ends: 376 [2020-12-22 10:29:00,008 INFO L226 Difference]: Without dead ends: 373 [2020-12-22 10:29:00,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:29:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-12-22 10:29:00,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 281. [2020-12-22 10:29:00,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-12-22 10:29:00,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 797 transitions. [2020-12-22 10:29:00,015 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 797 transitions. Word has length 14 [2020-12-22 10:29:00,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:00,016 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 797 transitions. [2020-12-22 10:29:00,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:00,016 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 797 transitions. [2020-12-22 10:29:00,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:00,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:00,017 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:00,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-12-22 10:29:00,217 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:00,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:00,218 INFO L82 PathProgramCache]: Analyzing trace with hash 506663317, now seen corresponding path program 87 times [2020-12-22 10:29:00,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:00,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623301373] [2020-12-22 10:29:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:00,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623301373] [2020-12-22 10:29:00,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256628803] [2020-12-22 10:29:00,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:00,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:29:00,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:00,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:00,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:00,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:00,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:00,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878782832] [2020-12-22 10:29:00,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:00,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:00,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:00,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:00,629 INFO L87 Difference]: Start difference. First operand 281 states and 797 transitions. Second operand 17 states. [2020-12-22 10:29:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:01,356 INFO L93 Difference]: Finished difference Result 394 states and 1030 transitions. [2020-12-22 10:29:01,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:29:01,357 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:01,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:01,358 INFO L225 Difference]: With dead ends: 394 [2020-12-22 10:29:01,358 INFO L226 Difference]: Without dead ends: 390 [2020-12-22 10:29:01,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:29:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-12-22 10:29:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 280. [2020-12-22 10:29:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-12-22 10:29:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 794 transitions. [2020-12-22 10:29:01,365 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 794 transitions. Word has length 14 [2020-12-22 10:29:01,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:01,366 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 794 transitions. [2020-12-22 10:29:01,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 794 transitions. [2020-12-22 10:29:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:01,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:01,367 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:01,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-12-22 10:29:01,581 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:01,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:01,581 INFO L82 PathProgramCache]: Analyzing trace with hash 525429725, now seen corresponding path program 88 times [2020-12-22 10:29:01,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:01,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691104098] [2020-12-22 10:29:01,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:01,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691104098] [2020-12-22 10:29:01,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059486388] [2020-12-22 10:29:01,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:01,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:01,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:01,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:01,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:01,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:01,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:01,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281725163] [2020-12-22 10:29:01,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:01,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:01,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:01,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:01,984 INFO L87 Difference]: Start difference. First operand 280 states and 794 transitions. Second operand 17 states. [2020-12-22 10:29:02,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:02,792 INFO L93 Difference]: Finished difference Result 380 states and 989 transitions. [2020-12-22 10:29:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:29:02,794 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:02,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:02,796 INFO L225 Difference]: With dead ends: 380 [2020-12-22 10:29:02,796 INFO L226 Difference]: Without dead ends: 377 [2020-12-22 10:29:02,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:29:02,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-12-22 10:29:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 279. [2020-12-22 10:29:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-12-22 10:29:02,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 791 transitions. [2020-12-22 10:29:02,803 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 791 transitions. Word has length 14 [2020-12-22 10:29:02,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:02,803 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 791 transitions. [2020-12-22 10:29:02,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:02,803 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 791 transitions. [2020-12-22 10:29:02,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:02,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:02,803 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:03,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-12-22 10:29:03,004 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:03,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:03,005 INFO L82 PathProgramCache]: Analyzing trace with hash 525431647, now seen corresponding path program 89 times [2020-12-22 10:29:03,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:03,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272386986] [2020-12-22 10:29:03,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:03,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272386986] [2020-12-22 10:29:03,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400797270] [2020-12-22 10:29:03,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:03,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:03,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:03,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:03,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:03,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:03,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:03,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958594670] [2020-12-22 10:29:03,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:03,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:03,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:03,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:03,418 INFO L87 Difference]: Start difference. First operand 279 states and 791 transitions. Second operand 17 states. [2020-12-22 10:29:04,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:04,260 INFO L93 Difference]: Finished difference Result 393 states and 1014 transitions. [2020-12-22 10:29:04,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:29:04,261 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:04,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:04,263 INFO L225 Difference]: With dead ends: 393 [2020-12-22 10:29:04,263 INFO L226 Difference]: Without dead ends: 389 [2020-12-22 10:29:04,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=346, Invalid=844, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 10:29:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-12-22 10:29:04,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 280. [2020-12-22 10:29:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-12-22 10:29:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 793 transitions. [2020-12-22 10:29:04,268 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 793 transitions. Word has length 14 [2020-12-22 10:29:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:04,269 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 793 transitions. [2020-12-22 10:29:04,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:04,269 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 793 transitions. [2020-12-22 10:29:04,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:04,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:04,269 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:04,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:04,470 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:04,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:04,471 INFO L82 PathProgramCache]: Analyzing trace with hash 526035155, now seen corresponding path program 90 times [2020-12-22 10:29:04,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:04,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406727051] [2020-12-22 10:29:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:04,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406727051] [2020-12-22 10:29:04,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792699380] [2020-12-22 10:29:04,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:04,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:04,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:04,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:29:04,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:04,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:04,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:04,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88214405] [2020-12-22 10:29:04,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:04,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:04,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:04,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:04,960 INFO L87 Difference]: Start difference. First operand 280 states and 793 transitions. Second operand 17 states. [2020-12-22 10:29:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:05,742 INFO L93 Difference]: Finished difference Result 359 states and 939 transitions. [2020-12-22 10:29:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:29:05,743 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:05,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:05,744 INFO L225 Difference]: With dead ends: 359 [2020-12-22 10:29:05,744 INFO L226 Difference]: Without dead ends: 356 [2020-12-22 10:29:05,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:29:05,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-12-22 10:29:05,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 280. [2020-12-22 10:29:05,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-12-22 10:29:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 792 transitions. [2020-12-22 10:29:05,750 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 792 transitions. Word has length 14 [2020-12-22 10:29:05,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:05,750 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 792 transitions. [2020-12-22 10:29:05,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:05,750 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 792 transitions. [2020-12-22 10:29:05,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:05,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:05,751 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:05,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-12-22 10:29:05,966 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:05,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:05,966 INFO L82 PathProgramCache]: Analyzing trace with hash 526054623, now seen corresponding path program 91 times [2020-12-22 10:29:05,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:05,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806875468] [2020-12-22 10:29:05,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:06,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806875468] [2020-12-22 10:29:06,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206869019] [2020-12-22 10:29:06,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:06,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:06,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:06,365 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:06,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:06,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:29:06,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473658034] [2020-12-22 10:29:06,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:29:06,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:06,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:29:06,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:29:06,396 INFO L87 Difference]: Start difference. First operand 280 states and 792 transitions. Second operand 18 states. [2020-12-22 10:29:07,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:07,449 INFO L93 Difference]: Finished difference Result 385 states and 995 transitions. [2020-12-22 10:29:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:29:07,450 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:29:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:07,451 INFO L225 Difference]: With dead ends: 385 [2020-12-22 10:29:07,451 INFO L226 Difference]: Without dead ends: 370 [2020-12-22 10:29:07,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=576, Invalid=1316, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 10:29:07,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-12-22 10:29:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 270. [2020-12-22 10:29:07,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-12-22 10:29:07,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 759 transitions. [2020-12-22 10:29:07,457 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 759 transitions. Word has length 14 [2020-12-22 10:29:07,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:07,457 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 759 transitions. [2020-12-22 10:29:07,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:29:07,457 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 759 transitions. [2020-12-22 10:29:07,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:07,457 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:07,457 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:07,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:07,658 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:07,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:07,659 INFO L82 PathProgramCache]: Analyzing trace with hash 526094737, now seen corresponding path program 92 times [2020-12-22 10:29:07,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:07,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610372771] [2020-12-22 10:29:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:07,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610372771] [2020-12-22 10:29:07,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013164111] [2020-12-22 10:29:07,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:07,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:07,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:07,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:07,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:08,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:08,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:08,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415591771] [2020-12-22 10:29:08,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:08,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:08,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:08,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:08,070 INFO L87 Difference]: Start difference. First operand 270 states and 759 transitions. Second operand 17 states. [2020-12-22 10:29:09,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:09,003 INFO L93 Difference]: Finished difference Result 384 states and 993 transitions. [2020-12-22 10:29:09,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:29:09,004 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:09,005 INFO L225 Difference]: With dead ends: 384 [2020-12-22 10:29:09,005 INFO L226 Difference]: Without dead ends: 380 [2020-12-22 10:29:09,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=391, Invalid=941, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 10:29:09,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-12-22 10:29:09,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 272. [2020-12-22 10:29:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-12-22 10:29:09,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 766 transitions. [2020-12-22 10:29:09,012 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 766 transitions. Word has length 14 [2020-12-22 10:29:09,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:09,013 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 766 transitions. [2020-12-22 10:29:09,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:09,013 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 766 transitions. [2020-12-22 10:29:09,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:09,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:09,014 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:09,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-12-22 10:29:09,221 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:09,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:09,221 INFO L82 PathProgramCache]: Analyzing trace with hash 526114205, now seen corresponding path program 93 times [2020-12-22 10:29:09,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:09,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119189414] [2020-12-22 10:29:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:09,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119189414] [2020-12-22 10:29:09,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382456814] [2020-12-22 10:29:09,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:09,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 10:29:09,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:09,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:29:09,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:09,601 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:09,604 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:29:09,605 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:09,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:09,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:09,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590790007] [2020-12-22 10:29:09,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:09,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:09,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:09,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:09,630 INFO L87 Difference]: Start difference. First operand 272 states and 766 transitions. Second operand 17 states. [2020-12-22 10:29:11,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:11,242 INFO L93 Difference]: Finished difference Result 406 states and 1036 transitions. [2020-12-22 10:29:11,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 10:29:11,243 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:11,244 INFO L225 Difference]: With dead ends: 406 [2020-12-22 10:29:11,245 INFO L226 Difference]: Without dead ends: 394 [2020-12-22 10:29:11,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=693, Invalid=1757, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 10:29:11,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-12-22 10:29:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 273. [2020-12-22 10:29:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-12-22 10:29:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 770 transitions. [2020-12-22 10:29:11,250 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 770 transitions. Word has length 14 [2020-12-22 10:29:11,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:11,250 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 770 transitions. [2020-12-22 10:29:11,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 770 transitions. [2020-12-22 10:29:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:11,250 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:11,251 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:11,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:11,452 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:11,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:11,452 INFO L82 PathProgramCache]: Analyzing trace with hash 526116127, now seen corresponding path program 94 times [2020-12-22 10:29:11,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:11,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040264863] [2020-12-22 10:29:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:11,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040264863] [2020-12-22 10:29:11,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416465912] [2020-12-22 10:29:11,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:11,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:11,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:11,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:11,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:11,850 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:11,852 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:29:11,853 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:11,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:11,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:29:11,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297052166] [2020-12-22 10:29:11,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:29:11,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:11,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:29:11,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:29:11,883 INFO L87 Difference]: Start difference. First operand 273 states and 770 transitions. Second operand 18 states. [2020-12-22 10:29:13,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:13,413 INFO L93 Difference]: Finished difference Result 515 states and 1324 transitions. [2020-12-22 10:29:13,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 10:29:13,414 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:29:13,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:13,415 INFO L225 Difference]: With dead ends: 515 [2020-12-22 10:29:13,416 INFO L226 Difference]: Without dead ends: 499 [2020-12-22 10:29:13,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=623, Invalid=1633, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 10:29:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-12-22 10:29:13,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 269. [2020-12-22 10:29:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-22 10:29:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 757 transitions. [2020-12-22 10:29:13,420 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 757 transitions. Word has length 14 [2020-12-22 10:29:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:13,421 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 757 transitions. [2020-12-22 10:29:13,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:29:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 757 transitions. [2020-12-22 10:29:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:13,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:13,421 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:13,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:13,622 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:13,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:13,623 INFO L82 PathProgramCache]: Analyzing trace with hash 563919697, now seen corresponding path program 95 times [2020-12-22 10:29:13,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:13,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060247054] [2020-12-22 10:29:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:13,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060247054] [2020-12-22 10:29:13,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960855919] [2020-12-22 10:29:13,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:13,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:29:13,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:13,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:13,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:14,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:14,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:14,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962902611] [2020-12-22 10:29:14,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:14,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:14,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:14,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:14,009 INFO L87 Difference]: Start difference. First operand 269 states and 757 transitions. Second operand 17 states. [2020-12-22 10:29:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:14,882 INFO L93 Difference]: Finished difference Result 408 states and 1060 transitions. [2020-12-22 10:29:14,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:29:14,883 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:14,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:14,885 INFO L225 Difference]: With dead ends: 408 [2020-12-22 10:29:14,885 INFO L226 Difference]: Without dead ends: 403 [2020-12-22 10:29:14,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 10:29:14,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-12-22 10:29:14,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 269. [2020-12-22 10:29:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-22 10:29:14,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 757 transitions. [2020-12-22 10:29:14,892 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 757 transitions. Word has length 14 [2020-12-22 10:29:14,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:14,893 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 757 transitions. [2020-12-22 10:29:14,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:14,893 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 757 transitions. [2020-12-22 10:29:14,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:14,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:14,894 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:15,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-12-22 10:29:15,107 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:15,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:15,108 INFO L82 PathProgramCache]: Analyzing trace with hash 563981201, now seen corresponding path program 96 times [2020-12-22 10:29:15,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:15,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049883638] [2020-12-22 10:29:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:15,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049883638] [2020-12-22 10:29:15,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442855086] [2020-12-22 10:29:15,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:15,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:15,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:15,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:15,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:15,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:15,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:15,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079320349] [2020-12-22 10:29:15,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:15,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:15,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:15,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:15,484 INFO L87 Difference]: Start difference. First operand 269 states and 757 transitions. Second operand 17 states. [2020-12-22 10:29:15,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:15,968 INFO L93 Difference]: Finished difference Result 364 states and 954 transitions. [2020-12-22 10:29:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:29:15,969 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:15,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:15,971 INFO L225 Difference]: With dead ends: 364 [2020-12-22 10:29:15,971 INFO L226 Difference]: Without dead ends: 349 [2020-12-22 10:29:15,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:29:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-12-22 10:29:15,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 269. [2020-12-22 10:29:15,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-22 10:29:15,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 755 transitions. [2020-12-22 10:29:15,978 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 755 transitions. Word has length 14 [2020-12-22 10:29:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:15,979 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 755 transitions. [2020-12-22 10:29:15,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:15,979 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 755 transitions. [2020-12-22 10:29:15,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:15,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:15,979 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:16,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-12-22 10:29:16,187 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:16,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:16,187 INFO L82 PathProgramCache]: Analyzing trace with hash 582688027, now seen corresponding path program 97 times [2020-12-22 10:29:16,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:16,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502316065] [2020-12-22 10:29:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:16,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502316065] [2020-12-22 10:29:16,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219830069] [2020-12-22 10:29:16,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:16,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:16,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:16,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:16,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:16,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874103305] [2020-12-22 10:29:16,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:16,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:16,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:16,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:16,605 INFO L87 Difference]: Start difference. First operand 269 states and 755 transitions. Second operand 17 states. [2020-12-22 10:29:17,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:17,548 INFO L93 Difference]: Finished difference Result 400 states and 1037 transitions. [2020-12-22 10:29:17,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:29:17,549 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:17,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:17,550 INFO L225 Difference]: With dead ends: 400 [2020-12-22 10:29:17,550 INFO L226 Difference]: Without dead ends: 395 [2020-12-22 10:29:17,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:29:17,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-12-22 10:29:17,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 269. [2020-12-22 10:29:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-22 10:29:17,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 757 transitions. [2020-12-22 10:29:17,555 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 757 transitions. Word has length 14 [2020-12-22 10:29:17,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:17,555 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 757 transitions. [2020-12-22 10:29:17,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:17,556 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 757 transitions. [2020-12-22 10:29:17,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:17,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:17,556 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:17,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:17,757 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:17,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:17,757 INFO L82 PathProgramCache]: Analyzing trace with hash 583293457, now seen corresponding path program 98 times [2020-12-22 10:29:17,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:17,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708548732] [2020-12-22 10:29:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:17,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708548732] [2020-12-22 10:29:17,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706248062] [2020-12-22 10:29:17,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:17,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:17,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:17,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:29:17,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:18,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:18,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:18,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831410957] [2020-12-22 10:29:18,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:18,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:18,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:18,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:18,177 INFO L87 Difference]: Start difference. First operand 269 states and 757 transitions. Second operand 17 states. [2020-12-22 10:29:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:19,266 INFO L93 Difference]: Finished difference Result 398 states and 1039 transitions. [2020-12-22 10:29:19,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:29:19,267 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:19,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:19,267 INFO L225 Difference]: With dead ends: 398 [2020-12-22 10:29:19,268 INFO L226 Difference]: Without dead ends: 393 [2020-12-22 10:29:19,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=431, Invalid=1051, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 10:29:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-12-22 10:29:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 273. [2020-12-22 10:29:19,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-12-22 10:29:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 771 transitions. [2020-12-22 10:29:19,275 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 771 transitions. Word has length 14 [2020-12-22 10:29:19,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:19,275 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 771 transitions. [2020-12-22 10:29:19,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:19,275 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 771 transitions. [2020-12-22 10:29:19,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:19,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:19,276 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:19,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-12-22 10:29:19,490 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:19,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:19,490 INFO L82 PathProgramCache]: Analyzing trace with hash 583312925, now seen corresponding path program 99 times [2020-12-22 10:29:19,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:19,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272666422] [2020-12-22 10:29:19,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:19,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272666422] [2020-12-22 10:29:19,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98235445] [2020-12-22 10:29:19,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:19,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:19,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:19,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:19,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:19,908 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:19,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:19,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:19,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691187572] [2020-12-22 10:29:19,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:19,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:19,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:19,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:19,929 INFO L87 Difference]: Start difference. First operand 273 states and 771 transitions. Second operand 17 states. [2020-12-22 10:29:21,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:21,141 INFO L93 Difference]: Finished difference Result 357 states and 949 transitions. [2020-12-22 10:29:21,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 10:29:21,143 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:21,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:21,144 INFO L225 Difference]: With dead ends: 357 [2020-12-22 10:29:21,144 INFO L226 Difference]: Without dead ends: 343 [2020-12-22 10:29:21,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=550, Invalid=1342, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 10:29:21,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-12-22 10:29:21,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 278. [2020-12-22 10:29:21,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-22 10:29:21,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 781 transitions. [2020-12-22 10:29:21,150 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 781 transitions. Word has length 14 [2020-12-22 10:29:21,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:21,151 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 781 transitions. [2020-12-22 10:29:21,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:21,151 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 781 transitions. [2020-12-22 10:29:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:21,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:21,152 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:21,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-12-22 10:29:21,360 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:21,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:21,360 INFO L82 PathProgramCache]: Analyzing trace with hash 583314847, now seen corresponding path program 100 times [2020-12-22 10:29:21,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:21,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507696794] [2020-12-22 10:29:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:21,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507696794] [2020-12-22 10:29:21,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093680749] [2020-12-22 10:29:21,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:21,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:21,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:21,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:21,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:21,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:29:21,814 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:29:21,815 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:21,817 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:21,820 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:21,823 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:21,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:21,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:29:21,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174392128] [2020-12-22 10:29:21,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:29:21,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:21,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:29:21,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:29:21,883 INFO L87 Difference]: Start difference. First operand 278 states and 781 transitions. Second operand 18 states. [2020-12-22 10:29:23,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:23,665 INFO L93 Difference]: Finished difference Result 500 states and 1293 transitions. [2020-12-22 10:29:23,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 10:29:23,670 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:29:23,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:23,674 INFO L225 Difference]: With dead ends: 500 [2020-12-22 10:29:23,674 INFO L226 Difference]: Without dead ends: 484 [2020-12-22 10:29:23,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=668, Invalid=1684, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 10:29:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-12-22 10:29:23,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 275. [2020-12-22 10:29:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-12-22 10:29:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 769 transitions. [2020-12-22 10:29:23,681 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 769 transitions. Word has length 14 [2020-12-22 10:29:23,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:23,683 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 769 transitions. [2020-12-22 10:29:23,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:29:23,683 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 769 transitions. [2020-12-22 10:29:23,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:23,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:23,683 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:23,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-12-22 10:29:23,899 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:23,899 INFO L82 PathProgramCache]: Analyzing trace with hash 584536991, now seen corresponding path program 101 times [2020-12-22 10:29:23,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:23,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320208572] [2020-12-22 10:29:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:24,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320208572] [2020-12-22 10:29:24,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455998425] [2020-12-22 10:29:24,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:24,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:29:24,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:24,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:24,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:24,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:24,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:24,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134512660] [2020-12-22 10:29:24,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:24,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:24,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:24,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:24,293 INFO L87 Difference]: Start difference. First operand 275 states and 769 transitions. Second operand 17 states. [2020-12-22 10:29:24,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:24,900 INFO L93 Difference]: Finished difference Result 369 states and 972 transitions. [2020-12-22 10:29:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:29:24,901 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:24,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:24,902 INFO L225 Difference]: With dead ends: 369 [2020-12-22 10:29:24,902 INFO L226 Difference]: Without dead ends: 355 [2020-12-22 10:29:24,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:29:24,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-12-22 10:29:24,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 277. [2020-12-22 10:29:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-22 10:29:24,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 775 transitions. [2020-12-22 10:29:24,907 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 775 transitions. Word has length 14 [2020-12-22 10:29:24,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:24,907 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 775 transitions. [2020-12-22 10:29:24,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:24,908 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 775 transitions. [2020-12-22 10:29:24,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:24,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:24,908 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:25,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:25,109 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:25,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:25,109 INFO L82 PathProgramCache]: Analyzing trace with hash 585200081, now seen corresponding path program 102 times [2020-12-22 10:29:25,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:25,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314839783] [2020-12-22 10:29:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:25,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314839783] [2020-12-22 10:29:25,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120312411] [2020-12-22 10:29:25,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:25,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:25,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:25,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:25,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:25,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:25,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:25,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197224194] [2020-12-22 10:29:25,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:25,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:25,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:25,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:25,486 INFO L87 Difference]: Start difference. First operand 277 states and 775 transitions. Second operand 17 states. [2020-12-22 10:29:26,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:26,160 INFO L93 Difference]: Finished difference Result 362 states and 959 transitions. [2020-12-22 10:29:26,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:29:26,161 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:26,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:26,162 INFO L225 Difference]: With dead ends: 362 [2020-12-22 10:29:26,162 INFO L226 Difference]: Without dead ends: 349 [2020-12-22 10:29:26,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=310, Invalid=746, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:29:26,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-12-22 10:29:26,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 279. [2020-12-22 10:29:26,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-12-22 10:29:26,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 781 transitions. [2020-12-22 10:29:26,168 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 781 transitions. Word has length 14 [2020-12-22 10:29:26,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:26,168 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 781 transitions. [2020-12-22 10:29:26,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:26,168 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 781 transitions. [2020-12-22 10:29:26,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:26,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:26,169 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:26,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-12-22 10:29:26,370 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:26,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:26,370 INFO L82 PathProgramCache]: Analyzing trace with hash 585219549, now seen corresponding path program 103 times [2020-12-22 10:29:26,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:26,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002037949] [2020-12-22 10:29:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:26,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002037949] [2020-12-22 10:29:26,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626883759] [2020-12-22 10:29:26,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:26,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:26,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:26,751 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:26,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:26,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:26,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791950942] [2020-12-22 10:29:26,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:26,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:26,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:26,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:26,778 INFO L87 Difference]: Start difference. First operand 279 states and 781 transitions. Second operand 17 states. [2020-12-22 10:29:27,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:27,703 INFO L93 Difference]: Finished difference Result 375 states and 996 transitions. [2020-12-22 10:29:27,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:29:27,704 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:27,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:27,705 INFO L225 Difference]: With dead ends: 375 [2020-12-22 10:29:27,705 INFO L226 Difference]: Without dead ends: 364 [2020-12-22 10:29:27,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 10:29:27,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-12-22 10:29:27,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 281. [2020-12-22 10:29:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-12-22 10:29:27,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 791 transitions. [2020-12-22 10:29:27,709 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 791 transitions. Word has length 14 [2020-12-22 10:29:27,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:27,710 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 791 transitions. [2020-12-22 10:29:27,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:27,710 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 791 transitions. [2020-12-22 10:29:27,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:27,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:27,710 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:27,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-12-22 10:29:27,911 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:27,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:27,912 INFO L82 PathProgramCache]: Analyzing trace with hash 585221471, now seen corresponding path program 104 times [2020-12-22 10:29:27,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:27,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033677580] [2020-12-22 10:29:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:28,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033677580] [2020-12-22 10:29:28,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354352962] [2020-12-22 10:29:28,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:28,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:28,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:28,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:28,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:28,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:28,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:29:28,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501283804] [2020-12-22 10:29:28,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:29:28,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:28,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:29:28,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:29:28,330 INFO L87 Difference]: Start difference. First operand 281 states and 791 transitions. Second operand 18 states. [2020-12-22 10:29:29,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:29,374 INFO L93 Difference]: Finished difference Result 449 states and 1148 transitions. [2020-12-22 10:29:29,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:29:29,375 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:29:29,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:29,376 INFO L225 Difference]: With dead ends: 449 [2020-12-22 10:29:29,376 INFO L226 Difference]: Without dead ends: 405 [2020-12-22 10:29:29,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=460, Invalid=1180, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:29:29,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-12-22 10:29:29,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 276. [2020-12-22 10:29:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-12-22 10:29:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 781 transitions. [2020-12-22 10:29:29,380 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 781 transitions. Word has length 14 [2020-12-22 10:29:29,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:29,380 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 781 transitions. [2020-12-22 10:29:29,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:29:29,380 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 781 transitions. [2020-12-22 10:29:29,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:29,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:29,381 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:29,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:29,596 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:29,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:29,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1128994707, now seen corresponding path program 105 times [2020-12-22 10:29:29,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:29,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554120697] [2020-12-22 10:29:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:29,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554120697] [2020-12-22 10:29:29,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287062725] [2020-12-22 10:29:29,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:29,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:29,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:29,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:29,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:30,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:30,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:30,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671571231] [2020-12-22 10:29:30,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:30,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:30,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:30,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:30,022 INFO L87 Difference]: Start difference. First operand 276 states and 781 transitions. Second operand 17 states. [2020-12-22 10:29:30,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:30,379 INFO L93 Difference]: Finished difference Result 370 states and 979 transitions. [2020-12-22 10:29:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:29:30,380 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:30,381 INFO L225 Difference]: With dead ends: 370 [2020-12-22 10:29:30,381 INFO L226 Difference]: Without dead ends: 366 [2020-12-22 10:29:30,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:29:30,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-12-22 10:29:30,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 281. [2020-12-22 10:29:30,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-12-22 10:29:30,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 794 transitions. [2020-12-22 10:29:30,386 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 794 transitions. Word has length 14 [2020-12-22 10:29:30,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:30,386 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 794 transitions. [2020-12-22 10:29:30,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:30,386 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 794 transitions. [2020-12-22 10:29:30,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:30,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:30,387 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:30,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:30,588 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:30,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1130839827, now seen corresponding path program 106 times [2020-12-22 10:29:30,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:30,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467326133] [2020-12-22 10:29:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:30,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467326133] [2020-12-22 10:29:30,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758940556] [2020-12-22 10:29:30,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:30,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:30,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:30,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:30,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:30,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:30,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:30,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206786102] [2020-12-22 10:29:30,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:30,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:30,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:30,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:30,981 INFO L87 Difference]: Start difference. First operand 281 states and 794 transitions. Second operand 17 states. [2020-12-22 10:29:31,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:31,367 INFO L93 Difference]: Finished difference Result 378 states and 991 transitions. [2020-12-22 10:29:31,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:29:31,369 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:31,370 INFO L225 Difference]: With dead ends: 378 [2020-12-22 10:29:31,370 INFO L226 Difference]: Without dead ends: 374 [2020-12-22 10:29:31,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:29:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-12-22 10:29:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 286. [2020-12-22 10:29:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-22 10:29:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 807 transitions. [2020-12-22 10:29:31,377 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 807 transitions. Word has length 14 [2020-12-22 10:29:31,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:31,378 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 807 transitions. [2020-12-22 10:29:31,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:31,378 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 807 transitions. [2020-12-22 10:29:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:31,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:31,379 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:31,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:31,596 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:31,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1130841749, now seen corresponding path program 107 times [2020-12-22 10:29:31,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:31,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465209986] [2020-12-22 10:29:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:31,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465209986] [2020-12-22 10:29:31,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799661228] [2020-12-22 10:29:31,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:31,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:29:31,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:31,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:31,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:32,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:32,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:32,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462852349] [2020-12-22 10:29:32,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:32,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:32,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:32,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:32,011 INFO L87 Difference]: Start difference. First operand 286 states and 807 transitions. Second operand 17 states. [2020-12-22 10:29:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:32,390 INFO L93 Difference]: Finished difference Result 390 states and 1019 transitions. [2020-12-22 10:29:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:29:32,392 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:32,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:32,393 INFO L225 Difference]: With dead ends: 390 [2020-12-22 10:29:32,394 INFO L226 Difference]: Without dead ends: 372 [2020-12-22 10:29:32,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:29:32,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-12-22 10:29:32,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 287. [2020-12-22 10:29:32,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-22 10:29:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 805 transitions. [2020-12-22 10:29:32,401 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 805 transitions. Word has length 14 [2020-12-22 10:29:32,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:32,402 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 805 transitions. [2020-12-22 10:29:32,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:32,402 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 805 transitions. [2020-12-22 10:29:32,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:32,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:32,402 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:32,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:32,603 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:32,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:32,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1130899409, now seen corresponding path program 108 times [2020-12-22 10:29:32,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:32,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193121913] [2020-12-22 10:29:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:32,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193121913] [2020-12-22 10:29:32,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217546082] [2020-12-22 10:29:32,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:32,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 10:29:32,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:32,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:32,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:33,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:33,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:33,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597814906] [2020-12-22 10:29:33,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:33,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:33,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:33,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:33,005 INFO L87 Difference]: Start difference. First operand 287 states and 805 transitions. Second operand 17 states. [2020-12-22 10:29:33,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:33,426 INFO L93 Difference]: Finished difference Result 382 states and 1003 transitions. [2020-12-22 10:29:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:29:33,428 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:33,429 INFO L225 Difference]: With dead ends: 382 [2020-12-22 10:29:33,429 INFO L226 Difference]: Without dead ends: 369 [2020-12-22 10:29:33,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:29:33,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-12-22 10:29:33,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 290. [2020-12-22 10:29:33,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-12-22 10:29:33,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 809 transitions. [2020-12-22 10:29:33,434 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 809 transitions. Word has length 14 [2020-12-22 10:29:33,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:33,435 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 809 transitions. [2020-12-22 10:29:33,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 809 transitions. [2020-12-22 10:29:33,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:33,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:33,436 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:33,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-12-22 10:29:33,642 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:33,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1186310669, now seen corresponding path program 109 times [2020-12-22 10:29:33,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:33,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489057663] [2020-12-22 10:29:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:33,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489057663] [2020-12-22 10:29:33,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569846482] [2020-12-22 10:29:33,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:33,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:33,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:34,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:34,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:34,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403724873] [2020-12-22 10:29:34,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:34,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:34,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:34,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:34,133 INFO L87 Difference]: Start difference. First operand 290 states and 809 transitions. Second operand 17 states. [2020-12-22 10:29:34,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:34,517 INFO L93 Difference]: Finished difference Result 369 states and 974 transitions. [2020-12-22 10:29:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:29:34,518 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:34,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:34,519 INFO L225 Difference]: With dead ends: 369 [2020-12-22 10:29:34,519 INFO L226 Difference]: Without dead ends: 364 [2020-12-22 10:29:34,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:29:34,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-12-22 10:29:34,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 288. [2020-12-22 10:29:34,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-12-22 10:29:34,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 805 transitions. [2020-12-22 10:29:34,525 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 805 transitions. Word has length 14 [2020-12-22 10:29:34,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:34,525 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 805 transitions. [2020-12-22 10:29:34,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:34,525 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 805 transitions. [2020-12-22 10:29:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:34,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:34,526 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:34,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-12-22 10:29:34,734 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:34,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:34,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1733566455, now seen corresponding path program 110 times [2020-12-22 10:29:34,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:34,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281082854] [2020-12-22 10:29:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:34,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281082854] [2020-12-22 10:29:34,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699775578] [2020-12-22 10:29:34,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:34,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:34,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:34,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:34,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:35,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:35,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:35,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110598918] [2020-12-22 10:29:35,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:35,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:35,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:35,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:35,143 INFO L87 Difference]: Start difference. First operand 288 states and 805 transitions. Second operand 17 states. [2020-12-22 10:29:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:35,592 INFO L93 Difference]: Finished difference Result 388 states and 1013 transitions. [2020-12-22 10:29:35,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:29:35,593 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:35,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:35,594 INFO L225 Difference]: With dead ends: 388 [2020-12-22 10:29:35,594 INFO L226 Difference]: Without dead ends: 384 [2020-12-22 10:29:35,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:29:35,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-12-22 10:29:35,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 289. [2020-12-22 10:29:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-12-22 10:29:35,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 808 transitions. [2020-12-22 10:29:35,600 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 808 transitions. Word has length 14 [2020-12-22 10:29:35,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:35,600 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 808 transitions. [2020-12-22 10:29:35,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:35,601 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 808 transitions. [2020-12-22 10:29:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:35,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:35,601 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:35,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-12-22 10:29:35,802 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:35,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:35,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1735411575, now seen corresponding path program 111 times [2020-12-22 10:29:35,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:35,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161209287] [2020-12-22 10:29:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:35,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161209287] [2020-12-22 10:29:35,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576980462] [2020-12-22 10:29:35,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:35,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:35,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:35,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:36,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:36,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:36,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:36,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907409559] [2020-12-22 10:29:36,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:36,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:36,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:36,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:36,203 INFO L87 Difference]: Start difference. First operand 289 states and 808 transitions. Second operand 17 states. [2020-12-22 10:29:36,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:36,772 INFO L93 Difference]: Finished difference Result 397 states and 1027 transitions. [2020-12-22 10:29:36,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:29:36,774 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:36,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:36,774 INFO L225 Difference]: With dead ends: 397 [2020-12-22 10:29:36,774 INFO L226 Difference]: Without dead ends: 393 [2020-12-22 10:29:36,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=563, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:29:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-12-22 10:29:36,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 294. [2020-12-22 10:29:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-12-22 10:29:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 821 transitions. [2020-12-22 10:29:36,779 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 821 transitions. Word has length 14 [2020-12-22 10:29:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:36,779 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 821 transitions. [2020-12-22 10:29:36,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 821 transitions. [2020-12-22 10:29:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:36,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:36,780 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:36,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:36,982 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:36,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1735413497, now seen corresponding path program 112 times [2020-12-22 10:29:36,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:36,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424412083] [2020-12-22 10:29:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:37,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424412083] [2020-12-22 10:29:37,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136835102] [2020-12-22 10:29:37,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:37,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:37,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:37,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:37,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:37,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:37,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:37,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907188386] [2020-12-22 10:29:37,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:37,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:37,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:37,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:37,416 INFO L87 Difference]: Start difference. First operand 294 states and 821 transitions. Second operand 17 states. [2020-12-22 10:29:37,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:37,859 INFO L93 Difference]: Finished difference Result 406 states and 1048 transitions. [2020-12-22 10:29:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:29:37,860 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:37,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:37,862 INFO L225 Difference]: With dead ends: 406 [2020-12-22 10:29:37,862 INFO L226 Difference]: Without dead ends: 388 [2020-12-22 10:29:37,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:29:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-12-22 10:29:37,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 295. [2020-12-22 10:29:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-12-22 10:29:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 819 transitions. [2020-12-22 10:29:37,869 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 819 transitions. Word has length 14 [2020-12-22 10:29:37,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:37,870 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 819 transitions. [2020-12-22 10:29:37,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 819 transitions. [2020-12-22 10:29:37,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:37,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:37,871 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:38,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-12-22 10:29:38,073 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:38,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:38,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1735471157, now seen corresponding path program 113 times [2020-12-22 10:29:38,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:38,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016856946] [2020-12-22 10:29:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:38,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016856946] [2020-12-22 10:29:38,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995725945] [2020-12-22 10:29:38,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:38,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 10:29:38,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:38,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:38,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:38,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:38,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:38,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69830087] [2020-12-22 10:29:38,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:38,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:38,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:38,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:38,471 INFO L87 Difference]: Start difference. First operand 295 states and 819 transitions. Second operand 17 states. [2020-12-22 10:29:39,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:39,038 INFO L93 Difference]: Finished difference Result 395 states and 1027 transitions. [2020-12-22 10:29:39,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:29:39,039 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:39,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:39,040 INFO L225 Difference]: With dead ends: 395 [2020-12-22 10:29:39,040 INFO L226 Difference]: Without dead ends: 382 [2020-12-22 10:29:39,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:29:39,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-12-22 10:29:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 292. [2020-12-22 10:29:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-12-22 10:29:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 813 transitions. [2020-12-22 10:29:39,046 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 813 transitions. Word has length 14 [2020-12-22 10:29:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:39,046 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 813 transitions. [2020-12-22 10:29:39,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 813 transitions. [2020-12-22 10:29:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:39,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:39,047 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:39,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:39,248 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:39,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:39,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1790882417, now seen corresponding path program 114 times [2020-12-22 10:29:39,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:39,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225123397] [2020-12-22 10:29:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:39,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225123397] [2020-12-22 10:29:39,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112770975] [2020-12-22 10:29:39,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:39,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:39,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:39,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:39,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:39,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:39,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:39,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361356416] [2020-12-22 10:29:39,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:39,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:39,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:39,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:39,799 INFO L87 Difference]: Start difference. First operand 292 states and 813 transitions. Second operand 17 states. [2020-12-22 10:29:40,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:40,271 INFO L93 Difference]: Finished difference Result 377 states and 990 transitions. [2020-12-22 10:29:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:29:40,272 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:40,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:40,273 INFO L225 Difference]: With dead ends: 377 [2020-12-22 10:29:40,273 INFO L226 Difference]: Without dead ends: 372 [2020-12-22 10:29:40,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:29:40,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-12-22 10:29:40,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 286. [2020-12-22 10:29:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-22 10:29:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 801 transitions. [2020-12-22 10:29:40,278 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 801 transitions. Word has length 14 [2020-12-22 10:29:40,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:40,279 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 801 transitions. [2020-12-22 10:29:40,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:40,279 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 801 transitions. [2020-12-22 10:29:40,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:40,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:40,279 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:40,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-12-22 10:29:40,480 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:40,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1704904895, now seen corresponding path program 115 times [2020-12-22 10:29:40,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:40,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135638682] [2020-12-22 10:29:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:40,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135638682] [2020-12-22 10:29:40,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476299589] [2020-12-22 10:29:40,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:40,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:40,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:40,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:40,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:40,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89326692] [2020-12-22 10:29:40,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:40,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:40,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:40,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:40,909 INFO L87 Difference]: Start difference. First operand 286 states and 801 transitions. Second operand 17 states. [2020-12-22 10:29:41,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:41,357 INFO L93 Difference]: Finished difference Result 380 states and 996 transitions. [2020-12-22 10:29:41,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:29:41,358 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:41,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:41,359 INFO L225 Difference]: With dead ends: 380 [2020-12-22 10:29:41,359 INFO L226 Difference]: Without dead ends: 376 [2020-12-22 10:29:41,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:29:41,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-12-22 10:29:41,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 286. [2020-12-22 10:29:41,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-22 10:29:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 801 transitions. [2020-12-22 10:29:41,364 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 801 transitions. Word has length 14 [2020-12-22 10:29:41,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:41,364 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 801 transitions. [2020-12-22 10:29:41,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 801 transitions. [2020-12-22 10:29:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:41,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:41,365 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:41,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:41,565 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:41,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:41,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1703059775, now seen corresponding path program 116 times [2020-12-22 10:29:41,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:41,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015286771] [2020-12-22 10:29:41,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:41,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015286771] [2020-12-22 10:29:41,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006535824] [2020-12-22 10:29:41,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:41,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:41,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:41,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:41,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:41,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:41,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:41,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873452348] [2020-12-22 10:29:42,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:42,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:42,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:42,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:42,001 INFO L87 Difference]: Start difference. First operand 286 states and 801 transitions. Second operand 17 states. [2020-12-22 10:29:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:42,523 INFO L93 Difference]: Finished difference Result 388 states and 1009 transitions. [2020-12-22 10:29:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:29:42,525 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:42,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:42,526 INFO L225 Difference]: With dead ends: 388 [2020-12-22 10:29:42,526 INFO L226 Difference]: Without dead ends: 384 [2020-12-22 10:29:42,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:29:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-12-22 10:29:42,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 288. [2020-12-22 10:29:42,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-12-22 10:29:42,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 807 transitions. [2020-12-22 10:29:42,533 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 807 transitions. Word has length 14 [2020-12-22 10:29:42,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:42,533 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 807 transitions. [2020-12-22 10:29:42,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:42,533 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 807 transitions. [2020-12-22 10:29:42,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:42,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:42,534 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:42,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-12-22 10:29:42,748 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:42,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:42,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1703057853, now seen corresponding path program 117 times [2020-12-22 10:29:42,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:42,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110307449] [2020-12-22 10:29:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:42,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110307449] [2020-12-22 10:29:42,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076029818] [2020-12-22 10:29:42,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:42,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:42,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:42,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:42,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:43,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:43,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:43,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230822743] [2020-12-22 10:29:43,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:43,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:43,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:43,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:43,148 INFO L87 Difference]: Start difference. First operand 288 states and 807 transitions. Second operand 17 states. [2020-12-22 10:29:43,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:43,650 INFO L93 Difference]: Finished difference Result 399 states and 1034 transitions. [2020-12-22 10:29:43,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:29:43,651 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:43,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:43,652 INFO L225 Difference]: With dead ends: 399 [2020-12-22 10:29:43,652 INFO L226 Difference]: Without dead ends: 381 [2020-12-22 10:29:43,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:29:43,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-12-22 10:29:43,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 291. [2020-12-22 10:29:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-12-22 10:29:43,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 809 transitions. [2020-12-22 10:29:43,658 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 809 transitions. Word has length 14 [2020-12-22 10:29:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:43,658 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 809 transitions. [2020-12-22 10:29:43,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 809 transitions. [2020-12-22 10:29:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:43,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:43,659 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:43,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:43,860 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:43,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:43,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1703000193, now seen corresponding path program 118 times [2020-12-22 10:29:43,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:43,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376897275] [2020-12-22 10:29:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:43,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376897275] [2020-12-22 10:29:43,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365149654] [2020-12-22 10:29:43,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:44,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:44,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:44,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:44,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:44,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:44,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:44,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604904870] [2020-12-22 10:29:44,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:44,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:44,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:44,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:44,293 INFO L87 Difference]: Start difference. First operand 291 states and 809 transitions. Second operand 17 states. [2020-12-22 10:29:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:44,866 INFO L93 Difference]: Finished difference Result 389 states and 1012 transitions. [2020-12-22 10:29:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:29:44,867 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:44,868 INFO L225 Difference]: With dead ends: 389 [2020-12-22 10:29:44,868 INFO L226 Difference]: Without dead ends: 376 [2020-12-22 10:29:44,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:29:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-12-22 10:29:44,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 286. [2020-12-22 10:29:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-22 10:29:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 799 transitions. [2020-12-22 10:29:44,873 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 799 transitions. Word has length 14 [2020-12-22 10:29:44,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:44,873 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 799 transitions. [2020-12-22 10:29:44,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 799 transitions. [2020-12-22 10:29:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:44,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:44,874 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:45,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-12-22 10:29:45,078 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:45,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:45,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1123086665, now seen corresponding path program 119 times [2020-12-22 10:29:45,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:45,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624605864] [2020-12-22 10:29:45,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:45,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624605864] [2020-12-22 10:29:45,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763365130] [2020-12-22 10:29:45,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:45,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:29:45,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:45,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:45,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:45,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:45,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:45,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821274725] [2020-12-22 10:29:45,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:45,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:45,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:45,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:45,531 INFO L87 Difference]: Start difference. First operand 286 states and 799 transitions. Second operand 17 states. [2020-12-22 10:29:46,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:46,025 INFO L93 Difference]: Finished difference Result 376 states and 981 transitions. [2020-12-22 10:29:46,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:29:46,026 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:46,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:46,027 INFO L225 Difference]: With dead ends: 376 [2020-12-22 10:29:46,027 INFO L226 Difference]: Without dead ends: 372 [2020-12-22 10:29:46,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:29:46,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-12-22 10:29:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 285. [2020-12-22 10:29:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-12-22 10:29:46,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 796 transitions. [2020-12-22 10:29:46,032 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 796 transitions. Word has length 14 [2020-12-22 10:29:46,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:46,032 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 796 transitions. [2020-12-22 10:29:46,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:46,033 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 796 transitions. [2020-12-22 10:29:46,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:46,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:46,033 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:46,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-12-22 10:29:46,234 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:46,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:46,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1104318335, now seen corresponding path program 120 times [2020-12-22 10:29:46,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:46,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760103716] [2020-12-22 10:29:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:46,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760103716] [2020-12-22 10:29:46,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864238109] [2020-12-22 10:29:46,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:46,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:46,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:46,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:46,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:46,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:46,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:46,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553846563] [2020-12-22 10:29:46,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:46,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:46,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:46,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:46,648 INFO L87 Difference]: Start difference. First operand 285 states and 796 transitions. Second operand 17 states. [2020-12-22 10:29:47,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:47,322 INFO L93 Difference]: Finished difference Result 364 states and 956 transitions. [2020-12-22 10:29:47,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:29:47,323 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:47,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:47,324 INFO L225 Difference]: With dead ends: 364 [2020-12-22 10:29:47,324 INFO L226 Difference]: Without dead ends: 360 [2020-12-22 10:29:47,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=666, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:29:47,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-12-22 10:29:47,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 285. [2020-12-22 10:29:47,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-12-22 10:29:47,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 795 transitions. [2020-12-22 10:29:47,329 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 795 transitions. Word has length 14 [2020-12-22 10:29:47,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:47,329 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 795 transitions. [2020-12-22 10:29:47,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 795 transitions. [2020-12-22 10:29:47,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:47,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:47,330 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:47,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-12-22 10:29:47,531 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:47,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:47,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1103655245, now seen corresponding path program 121 times [2020-12-22 10:29:47,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:47,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319576842] [2020-12-22 10:29:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:47,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319576842] [2020-12-22 10:29:47,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276556398] [2020-12-22 10:29:47,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:47,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:47,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:47,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:47,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:47,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737792658] [2020-12-22 10:29:47,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:47,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:47,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:47,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:47,952 INFO L87 Difference]: Start difference. First operand 285 states and 795 transitions. Second operand 17 states. [2020-12-22 10:29:48,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:48,717 INFO L93 Difference]: Finished difference Result 384 states and 996 transitions. [2020-12-22 10:29:48,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:29:48,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:48,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:48,719 INFO L225 Difference]: With dead ends: 384 [2020-12-22 10:29:48,719 INFO L226 Difference]: Without dead ends: 380 [2020-12-22 10:29:48,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=307, Invalid=749, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:29:48,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-12-22 10:29:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 287. [2020-12-22 10:29:48,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-22 10:29:48,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 802 transitions. [2020-12-22 10:29:48,724 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 802 transitions. Word has length 14 [2020-12-22 10:29:48,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:48,724 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 802 transitions. [2020-12-22 10:29:48,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:48,725 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 802 transitions. [2020-12-22 10:29:48,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:48,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:48,725 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:48,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:48,926 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:48,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:48,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1103633855, now seen corresponding path program 122 times [2020-12-22 10:29:48,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:48,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506024841] [2020-12-22 10:29:48,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:49,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506024841] [2020-12-22 10:29:49,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978695584] [2020-12-22 10:29:49,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:49,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:49,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:49,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:49,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:49,320 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:49,321 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:29:49,322 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:49,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:49,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:29:49,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38566405] [2020-12-22 10:29:49,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:29:49,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:49,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:29:49,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:29:49,357 INFO L87 Difference]: Start difference. First operand 287 states and 802 transitions. Second operand 18 states. [2020-12-22 10:29:50,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:50,703 INFO L93 Difference]: Finished difference Result 527 states and 1323 transitions. [2020-12-22 10:29:50,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 10:29:50,704 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:29:50,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:50,705 INFO L225 Difference]: With dead ends: 527 [2020-12-22 10:29:50,705 INFO L226 Difference]: Without dead ends: 513 [2020-12-22 10:29:50,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=545, Invalid=1347, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 10:29:50,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2020-12-22 10:29:50,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 283. [2020-12-22 10:29:50,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-12-22 10:29:50,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 790 transitions. [2020-12-22 10:29:50,711 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 790 transitions. Word has length 14 [2020-12-22 10:29:50,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:50,711 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 790 transitions. [2020-12-22 10:29:50,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:29:50,711 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 790 transitions. [2020-12-22 10:29:50,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:50,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:50,712 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:50,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:50,912 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:50,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1065830285, now seen corresponding path program 123 times [2020-12-22 10:29:50,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:50,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93519530] [2020-12-22 10:29:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:51,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93519530] [2020-12-22 10:29:51,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155009807] [2020-12-22 10:29:51,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:51,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:51,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:51,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:51,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:51,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:51,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:51,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:51,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134139396] [2020-12-22 10:29:51,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:51,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:51,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:51,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:51,333 INFO L87 Difference]: Start difference. First operand 283 states and 790 transitions. Second operand 17 states. [2020-12-22 10:29:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:52,085 INFO L93 Difference]: Finished difference Result 409 states and 1046 transitions. [2020-12-22 10:29:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:29:52,086 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:52,087 INFO L225 Difference]: With dead ends: 409 [2020-12-22 10:29:52,087 INFO L226 Difference]: Without dead ends: 405 [2020-12-22 10:29:52,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=283, Invalid=709, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:29:52,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-12-22 10:29:52,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 284. [2020-12-22 10:29:52,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-12-22 10:29:52,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 793 transitions. [2020-12-22 10:29:52,092 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 793 transitions. Word has length 14 [2020-12-22 10:29:52,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:52,093 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 793 transitions. [2020-12-22 10:29:52,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:52,093 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 793 transitions. [2020-12-22 10:29:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:52,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:52,093 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:52,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-12-22 10:29:52,294 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:52,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:52,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1065828363, now seen corresponding path program 124 times [2020-12-22 10:29:52,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:52,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24344619] [2020-12-22 10:29:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:52,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24344619] [2020-12-22 10:29:52,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649718536] [2020-12-22 10:29:52,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:52,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:52,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:52,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:52,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:52,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:52,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:52,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688510862] [2020-12-22 10:29:52,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:52,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:52,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:52,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:52,721 INFO L87 Difference]: Start difference. First operand 284 states and 793 transitions. Second operand 17 states. [2020-12-22 10:29:53,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:53,328 INFO L93 Difference]: Finished difference Result 414 states and 1060 transitions. [2020-12-22 10:29:53,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:29:53,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:53,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:53,331 INFO L225 Difference]: With dead ends: 414 [2020-12-22 10:29:53,331 INFO L226 Difference]: Without dead ends: 396 [2020-12-22 10:29:53,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:29:53,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-12-22 10:29:53,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 285. [2020-12-22 10:29:53,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-12-22 10:29:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 792 transitions. [2020-12-22 10:29:53,337 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 792 transitions. Word has length 14 [2020-12-22 10:29:53,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:53,337 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 792 transitions. [2020-12-22 10:29:53,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:53,337 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 792 transitions. [2020-12-22 10:29:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:53,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:53,338 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:53,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-12-22 10:29:53,539 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:53,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:53,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1065770703, now seen corresponding path program 125 times [2020-12-22 10:29:53,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:53,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551368055] [2020-12-22 10:29:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:53,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551368055] [2020-12-22 10:29:53,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919152404] [2020-12-22 10:29:53,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:53,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 10:29:53,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:53,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:53,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:53,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:53,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:53,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389367405] [2020-12-22 10:29:53,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:53,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:53,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:53,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:53,960 INFO L87 Difference]: Start difference. First operand 285 states and 792 transitions. Second operand 17 states. [2020-12-22 10:29:54,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:54,733 INFO L93 Difference]: Finished difference Result 397 states and 1024 transitions. [2020-12-22 10:29:54,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:29:54,734 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:54,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:54,735 INFO L225 Difference]: With dead ends: 397 [2020-12-22 10:29:54,736 INFO L226 Difference]: Without dead ends: 384 [2020-12-22 10:29:54,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:29:54,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-12-22 10:29:54,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 283. [2020-12-22 10:29:54,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-12-22 10:29:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 788 transitions. [2020-12-22 10:29:54,741 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 788 transitions. Word has length 14 [2020-12-22 10:29:54,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:54,741 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 788 transitions. [2020-12-22 10:29:54,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:54,741 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 788 transitions. [2020-12-22 10:29:54,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:54,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:54,742 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:54,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:54,942 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:54,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:54,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1047061955, now seen corresponding path program 126 times [2020-12-22 10:29:54,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:54,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974585996] [2020-12-22 10:29:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:55,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974585996] [2020-12-22 10:29:55,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911038079] [2020-12-22 10:29:55,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:55,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:55,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:55,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:55,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:55,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:55,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:55,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435436369] [2020-12-22 10:29:55,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:55,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:55,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:55,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:55,373 INFO L87 Difference]: Start difference. First operand 283 states and 788 transitions. Second operand 17 states. [2020-12-22 10:29:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:56,317 INFO L93 Difference]: Finished difference Result 405 states and 1029 transitions. [2020-12-22 10:29:56,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 10:29:56,318 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:56,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:56,319 INFO L225 Difference]: With dead ends: 405 [2020-12-22 10:29:56,319 INFO L226 Difference]: Without dead ends: 401 [2020-12-22 10:29:56,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=390, Invalid=942, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 10:29:56,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-12-22 10:29:56,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 282. [2020-12-22 10:29:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-12-22 10:29:56,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 785 transitions. [2020-12-22 10:29:56,324 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 785 transitions. Word has length 14 [2020-12-22 10:29:56,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:56,325 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 785 transitions. [2020-12-22 10:29:56,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:56,325 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 785 transitions. [2020-12-22 10:29:56,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:56,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:56,325 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:56,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:56,527 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:56,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:56,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1047060033, now seen corresponding path program 127 times [2020-12-22 10:29:56,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:56,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028870994] [2020-12-22 10:29:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:56,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028870994] [2020-12-22 10:29:56,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432517770] [2020-12-22 10:29:56,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:56,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:56,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:56,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:56,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:56,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646340898] [2020-12-22 10:29:56,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:56,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:56,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:56,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:56,945 INFO L87 Difference]: Start difference. First operand 282 states and 785 transitions. Second operand 17 states. [2020-12-22 10:29:57,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:57,759 INFO L93 Difference]: Finished difference Result 412 states and 1050 transitions. [2020-12-22 10:29:57,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:29:57,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:57,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:57,761 INFO L225 Difference]: With dead ends: 412 [2020-12-22 10:29:57,762 INFO L226 Difference]: Without dead ends: 395 [2020-12-22 10:29:57,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:29:57,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-12-22 10:29:57,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 280. [2020-12-22 10:29:57,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-12-22 10:29:57,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 776 transitions. [2020-12-22 10:29:57,767 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 776 transitions. Word has length 14 [2020-12-22 10:29:57,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:57,767 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 776 transitions. [2020-12-22 10:29:57,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:57,767 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 776 transitions. [2020-12-22 10:29:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:57,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:57,767 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:57,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:57,968 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:57,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:57,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1046456525, now seen corresponding path program 128 times [2020-12-22 10:29:57,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:57,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022692683] [2020-12-22 10:29:57,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:58,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022692683] [2020-12-22 10:29:58,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003278635] [2020-12-22 10:29:58,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:58,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:58,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:58,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:58,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:58,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:58,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:58,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670561746] [2020-12-22 10:29:58,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:58,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:58,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:58,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:58,416 INFO L87 Difference]: Start difference. First operand 280 states and 776 transitions. Second operand 17 states. [2020-12-22 10:29:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:59,413 INFO L93 Difference]: Finished difference Result 399 states and 1007 transitions. [2020-12-22 10:29:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:29:59,414 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:59,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:59,415 INFO L225 Difference]: With dead ends: 399 [2020-12-22 10:29:59,415 INFO L226 Difference]: Without dead ends: 395 [2020-12-22 10:29:59,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=390, Invalid=942, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 10:29:59,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-12-22 10:29:59,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 280. [2020-12-22 10:29:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-12-22 10:29:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 775 transitions. [2020-12-22 10:29:59,420 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 775 transitions. Word has length 14 [2020-12-22 10:29:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:59,420 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 775 transitions. [2020-12-22 10:29:59,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 775 transitions. [2020-12-22 10:29:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:59,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:59,421 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:59,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2020-12-22 10:29:59,622 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:59,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:59,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1046437057, now seen corresponding path program 129 times [2020-12-22 10:29:59,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:59,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633452285] [2020-12-22 10:29:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:59,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633452285] [2020-12-22 10:29:59,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88588609] [2020-12-22 10:29:59,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:59,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:29:59,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:59,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:29:59,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:00,012 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:00,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:00,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:00,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153449778] [2020-12-22 10:30:00,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:00,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:00,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:00,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:00,026 INFO L87 Difference]: Start difference. First operand 280 states and 775 transitions. Second operand 17 states. [2020-12-22 10:30:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:01,026 INFO L93 Difference]: Finished difference Result 367 states and 939 transitions. [2020-12-22 10:30:01,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 10:30:01,027 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:01,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:01,028 INFO L225 Difference]: With dead ends: 367 [2020-12-22 10:30:01,028 INFO L226 Difference]: Without dead ends: 356 [2020-12-22 10:30:01,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 10:30:01,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-12-22 10:30:01,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 277. [2020-12-22 10:30:01,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-22 10:30:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 758 transitions. [2020-12-22 10:30:01,034 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 758 transitions. Word has length 14 [2020-12-22 10:30:01,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:01,034 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 758 transitions. [2020-12-22 10:30:01,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:01,034 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 758 transitions. [2020-12-22 10:30:01,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:01,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:01,035 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:01,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-12-22 10:30:01,236 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:01,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:01,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1046435135, now seen corresponding path program 130 times [2020-12-22 10:30:01,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:01,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351241676] [2020-12-22 10:30:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:01,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351241676] [2020-12-22 10:30:01,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599676314] [2020-12-22 10:30:01,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:01,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:30:01,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:01,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:01,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:01,690 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:30:01,692 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:30:01,694 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:01,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:01,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:30:01,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947563535] [2020-12-22 10:30:01,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:30:01,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:01,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:30:01,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:30:01,737 INFO L87 Difference]: Start difference. First operand 277 states and 758 transitions. Second operand 18 states. [2020-12-22 10:30:03,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:03,250 INFO L93 Difference]: Finished difference Result 510 states and 1268 transitions. [2020-12-22 10:30:03,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 10:30:03,252 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:30:03,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:03,253 INFO L225 Difference]: With dead ends: 510 [2020-12-22 10:30:03,253 INFO L226 Difference]: Without dead ends: 494 [2020-12-22 10:30:03,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=557, Invalid=1423, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 10:30:03,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2020-12-22 10:30:03,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 271. [2020-12-22 10:30:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-22 10:30:03,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 736 transitions. [2020-12-22 10:30:03,258 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 736 transitions. Word has length 14 [2020-12-22 10:30:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:03,258 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 736 transitions. [2020-12-22 10:30:03,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:30:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 736 transitions. [2020-12-22 10:30:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:03,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:03,259 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:03,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-12-22 10:30:03,459 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:03,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:03,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1045214913, now seen corresponding path program 131 times [2020-12-22 10:30:03,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:03,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478801199] [2020-12-22 10:30:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:03,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478801199] [2020-12-22 10:30:03,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143427146] [2020-12-22 10:30:03,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:03,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 10:30:03,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:03,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:03,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:03,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:03,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:03,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211629786] [2020-12-22 10:30:03,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:03,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:03,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:03,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:03,920 INFO L87 Difference]: Start difference. First operand 271 states and 736 transitions. Second operand 17 states. [2020-12-22 10:30:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:04,849 INFO L93 Difference]: Finished difference Result 399 states and 1011 transitions. [2020-12-22 10:30:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:30:04,850 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:04,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:04,851 INFO L225 Difference]: With dead ends: 399 [2020-12-22 10:30:04,852 INFO L226 Difference]: Without dead ends: 386 [2020-12-22 10:30:04,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:30:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-12-22 10:30:04,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 270. [2020-12-22 10:30:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-12-22 10:30:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 739 transitions. [2020-12-22 10:30:04,856 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 739 transitions. Word has length 14 [2020-12-22 10:30:04,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:04,857 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 739 transitions. [2020-12-22 10:30:04,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:04,857 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 739 transitions. [2020-12-22 10:30:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:04,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:04,857 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:05,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-12-22 10:30:05,058 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:05,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:05,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1044609483, now seen corresponding path program 132 times [2020-12-22 10:30:05,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:05,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911480202] [2020-12-22 10:30:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:05,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911480202] [2020-12-22 10:30:05,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260533233] [2020-12-22 10:30:05,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:05,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 10:30:05,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:05,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:05,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:05,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:05,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:05,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937098435] [2020-12-22 10:30:05,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:05,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:05,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:05,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:05,519 INFO L87 Difference]: Start difference. First operand 270 states and 739 transitions. Second operand 17 states. [2020-12-22 10:30:06,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:06,518 INFO L93 Difference]: Finished difference Result 378 states and 962 transitions. [2020-12-22 10:30:06,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:30:06,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:06,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:06,521 INFO L225 Difference]: With dead ends: 378 [2020-12-22 10:30:06,521 INFO L226 Difference]: Without dead ends: 365 [2020-12-22 10:30:06,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=354, Invalid=836, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 10:30:06,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-12-22 10:30:06,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 276. [2020-12-22 10:30:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-12-22 10:30:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 754 transitions. [2020-12-22 10:30:06,526 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 754 transitions. Word has length 14 [2020-12-22 10:30:06,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:06,526 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 754 transitions. [2020-12-22 10:30:06,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:06,526 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 754 transitions. [2020-12-22 10:30:06,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:06,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:06,527 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:06,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-12-22 10:30:06,727 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:06,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:06,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1044590015, now seen corresponding path program 133 times [2020-12-22 10:30:06,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:06,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851240328] [2020-12-22 10:30:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:06,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851240328] [2020-12-22 10:30:06,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649132679] [2020-12-22 10:30:06,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:06,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:06,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:07,170 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:07,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:07,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:30:07,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145837995] [2020-12-22 10:30:07,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:30:07,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:07,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:30:07,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:30:07,210 INFO L87 Difference]: Start difference. First operand 276 states and 754 transitions. Second operand 18 states. [2020-12-22 10:30:08,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:08,795 INFO L93 Difference]: Finished difference Result 512 states and 1275 transitions. [2020-12-22 10:30:08,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 10:30:08,796 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:30:08,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:08,798 INFO L225 Difference]: With dead ends: 512 [2020-12-22 10:30:08,798 INFO L226 Difference]: Without dead ends: 482 [2020-12-22 10:30:08,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=623, Invalid=1633, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 10:30:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-12-22 10:30:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 273. [2020-12-22 10:30:08,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-12-22 10:30:08,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 746 transitions. [2020-12-22 10:30:08,803 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 746 transitions. Word has length 14 [2020-12-22 10:30:08,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:08,803 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 746 transitions. [2020-12-22 10:30:08,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:30:08,803 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 746 transitions. [2020-12-22 10:30:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:08,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:08,804 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:09,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-12-22 10:30:09,006 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:09,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:09,006 INFO L82 PathProgramCache]: Analyzing trace with hash 70160127, now seen corresponding path program 134 times [2020-12-22 10:30:09,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:09,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789515579] [2020-12-22 10:30:09,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:09,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789515579] [2020-12-22 10:30:09,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416397026] [2020-12-22 10:30:09,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:09,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:09,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:09,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:09,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:09,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:09,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:09,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327542125] [2020-12-22 10:30:09,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:09,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:09,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:09,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:09,494 INFO L87 Difference]: Start difference. First operand 273 states and 746 transitions. Second operand 17 states. [2020-12-22 10:30:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:10,068 INFO L93 Difference]: Finished difference Result 373 states and 955 transitions. [2020-12-22 10:30:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:30:10,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:10,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:10,071 INFO L225 Difference]: With dead ends: 373 [2020-12-22 10:30:10,071 INFO L226 Difference]: Without dead ends: 368 [2020-12-22 10:30:10,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:30:10,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-12-22 10:30:10,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 271. [2020-12-22 10:30:10,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-22 10:30:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 742 transitions. [2020-12-22 10:30:10,076 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 742 transitions. Word has length 14 [2020-12-22 10:30:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:10,076 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 742 transitions. [2020-12-22 10:30:10,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 742 transitions. [2020-12-22 10:30:10,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:10,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:10,077 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:10,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:10,278 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash 651978357, now seen corresponding path program 135 times [2020-12-22 10:30:10,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:10,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846018741] [2020-12-22 10:30:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:10,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846018741] [2020-12-22 10:30:10,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693768881] [2020-12-22 10:30:10,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:10,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:30:10,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:10,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:10,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:10,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:10,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:10,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163556035] [2020-12-22 10:30:10,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:10,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:10,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:10,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:10,800 INFO L87 Difference]: Start difference. First operand 271 states and 742 transitions. Second operand 17 states. [2020-12-22 10:30:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:11,460 INFO L93 Difference]: Finished difference Result 368 states and 941 transitions. [2020-12-22 10:30:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:30:11,462 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:11,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:11,463 INFO L225 Difference]: With dead ends: 368 [2020-12-22 10:30:11,463 INFO L226 Difference]: Without dead ends: 363 [2020-12-22 10:30:11,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:30:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-12-22 10:30:11,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 270. [2020-12-22 10:30:11,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-12-22 10:30:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 740 transitions. [2020-12-22 10:30:11,470 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 740 transitions. Word has length 14 [2020-12-22 10:30:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:11,470 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 740 transitions. [2020-12-22 10:30:11,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 740 transitions. [2020-12-22 10:30:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:11,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:11,471 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:11,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-12-22 10:30:11,685 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:11,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:11,685 INFO L82 PathProgramCache]: Analyzing trace with hash 672534147, now seen corresponding path program 136 times [2020-12-22 10:30:11,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:11,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364035984] [2020-12-22 10:30:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:11,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364035984] [2020-12-22 10:30:11,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639084976] [2020-12-22 10:30:11,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:11,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:30:11,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:11,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:11,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:12,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:12,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:12,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691144851] [2020-12-22 10:30:12,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:12,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:12,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:12,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:12,203 INFO L87 Difference]: Start difference. First operand 270 states and 740 transitions. Second operand 17 states. [2020-12-22 10:30:13,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:13,120 INFO L93 Difference]: Finished difference Result 380 states and 965 transitions. [2020-12-22 10:30:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:30:13,122 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:13,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:13,123 INFO L225 Difference]: With dead ends: 380 [2020-12-22 10:30:13,123 INFO L226 Difference]: Without dead ends: 375 [2020-12-22 10:30:13,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=257, Invalid=613, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:30:13,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-12-22 10:30:13,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 269. [2020-12-22 10:30:13,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-22 10:30:13,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 738 transitions. [2020-12-22 10:30:13,128 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 738 transitions. Word has length 14 [2020-12-22 10:30:13,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:13,128 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 738 transitions. [2020-12-22 10:30:13,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:13,128 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 738 transitions. [2020-12-22 10:30:13,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:13,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:13,128 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:13,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:13,329 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:13,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:13,330 INFO L82 PathProgramCache]: Analyzing trace with hash 673139577, now seen corresponding path program 137 times [2020-12-22 10:30:13,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:13,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135948591] [2020-12-22 10:30:13,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:13,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135948591] [2020-12-22 10:30:13,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269471499] [2020-12-22 10:30:13,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:13,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:30:13,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:13,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:13,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:13,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:13,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:13,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846914243] [2020-12-22 10:30:13,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:13,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:13,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:13,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:13,849 INFO L87 Difference]: Start difference. First operand 269 states and 738 transitions. Second operand 17 states. [2020-12-22 10:30:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:14,905 INFO L93 Difference]: Finished difference Result 395 states and 1006 transitions. [2020-12-22 10:30:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:30:14,906 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:14,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:14,907 INFO L225 Difference]: With dead ends: 395 [2020-12-22 10:30:14,907 INFO L226 Difference]: Without dead ends: 382 [2020-12-22 10:30:14,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=322, Invalid=734, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:30:14,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-12-22 10:30:14,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 272. [2020-12-22 10:30:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-12-22 10:30:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 744 transitions. [2020-12-22 10:30:14,912 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 744 transitions. Word has length 14 [2020-12-22 10:30:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:14,913 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 744 transitions. [2020-12-22 10:30:14,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 744 transitions. [2020-12-22 10:30:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:14,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:14,913 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:15,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:15,114 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:15,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:15,114 INFO L82 PathProgramCache]: Analyzing trace with hash 673159045, now seen corresponding path program 138 times [2020-12-22 10:30:15,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:15,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216779209] [2020-12-22 10:30:15,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:15,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216779209] [2020-12-22 10:30:15,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527192611] [2020-12-22 10:30:15,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:15,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:30:15,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:15,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:30:15,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:15,588 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:15,589 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:30:15,590 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:15,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:15,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:30:15,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755152315] [2020-12-22 10:30:15,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:30:15,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:15,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:30:15,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:30:15,636 INFO L87 Difference]: Start difference. First operand 272 states and 744 transitions. Second operand 18 states. [2020-12-22 10:30:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:17,099 INFO L93 Difference]: Finished difference Result 486 states and 1204 transitions. [2020-12-22 10:30:17,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 10:30:17,100 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:30:17,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:17,101 INFO L225 Difference]: With dead ends: 486 [2020-12-22 10:30:17,101 INFO L226 Difference]: Without dead ends: 457 [2020-12-22 10:30:17,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=495, Invalid=1227, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 10:30:17,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2020-12-22 10:30:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 262. [2020-12-22 10:30:17,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-22 10:30:17,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 709 transitions. [2020-12-22 10:30:17,106 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 709 transitions. Word has length 14 [2020-12-22 10:30:17,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:17,106 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 709 transitions. [2020-12-22 10:30:17,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:30:17,107 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 709 transitions. [2020-12-22 10:30:17,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:17,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:17,107 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:17,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:17,321 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:17,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:17,322 INFO L82 PathProgramCache]: Analyzing trace with hash 728610419, now seen corresponding path program 139 times [2020-12-22 10:30:17,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:17,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868634793] [2020-12-22 10:30:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:17,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868634793] [2020-12-22 10:30:17,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181198046] [2020-12-22 10:30:17,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:17,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:17,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:17,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:17,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:17,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200053194] [2020-12-22 10:30:17,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:17,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:17,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:17,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:17,847 INFO L87 Difference]: Start difference. First operand 262 states and 709 transitions. Second operand 17 states. [2020-12-22 10:30:18,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:18,634 INFO L93 Difference]: Finished difference Result 352 states and 897 transitions. [2020-12-22 10:30:18,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:30:18,635 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:18,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:18,636 INFO L225 Difference]: With dead ends: 352 [2020-12-22 10:30:18,636 INFO L226 Difference]: Without dead ends: 339 [2020-12-22 10:30:18,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:30:18,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-12-22 10:30:18,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 262. [2020-12-22 10:30:18,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-22 10:30:18,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 707 transitions. [2020-12-22 10:30:18,641 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 707 transitions. Word has length 14 [2020-12-22 10:30:18,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:18,642 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 707 transitions. [2020-12-22 10:30:18,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:18,642 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 707 transitions. [2020-12-22 10:30:18,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:18,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:18,642 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:18,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:18,843 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:18,844 INFO L82 PathProgramCache]: Analyzing trace with hash 728629887, now seen corresponding path program 140 times [2020-12-22 10:30:18,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:18,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636566915] [2020-12-22 10:30:18,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:19,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636566915] [2020-12-22 10:30:19,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445490894] [2020-12-22 10:30:19,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:19,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:19,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:19,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:19,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:19,381 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:19,383 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:30:19,384 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:19,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:19,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:19,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771026939] [2020-12-22 10:30:19,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:19,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:19,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:19,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:19,410 INFO L87 Difference]: Start difference. First operand 262 states and 707 transitions. Second operand 17 states. [2020-12-22 10:30:20,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:20,378 INFO L93 Difference]: Finished difference Result 368 states and 934 transitions. [2020-12-22 10:30:20,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:30:20,380 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:20,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:20,381 INFO L225 Difference]: With dead ends: 368 [2020-12-22 10:30:20,381 INFO L226 Difference]: Without dead ends: 359 [2020-12-22 10:30:20,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=357, Invalid=765, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:30:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-12-22 10:30:20,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 259. [2020-12-22 10:30:20,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-22 10:30:20,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 693 transitions. [2020-12-22 10:30:20,386 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 693 transitions. Word has length 14 [2020-12-22 10:30:20,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:20,386 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 693 transitions. [2020-12-22 10:30:20,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:20,386 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 693 transitions. [2020-12-22 10:30:20,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:20,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:20,386 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:20,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-12-22 10:30:20,587 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:20,588 INFO L82 PathProgramCache]: Analyzing trace with hash 728631809, now seen corresponding path program 141 times [2020-12-22 10:30:20,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:20,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976508428] [2020-12-22 10:30:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:20,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976508428] [2020-12-22 10:30:20,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521833688] [2020-12-22 10:30:20,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:20,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:30:20,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:20,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:20,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:21,119 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:30:21,121 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:30:21,124 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:30:21,126 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-22 10:30:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:21,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:21,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:30:21,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594700101] [2020-12-22 10:30:21,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:30:21,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:21,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:30:21,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:30:21,247 INFO L87 Difference]: Start difference. First operand 259 states and 693 transitions. Second operand 18 states. [2020-12-22 10:30:23,968 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-12-22 10:30:26,575 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 51 [2020-12-22 10:30:40,896 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 48 [2020-12-22 10:30:45,121 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-12-22 10:30:47,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:47,292 INFO L93 Difference]: Finished difference Result 441 states and 1060 transitions. [2020-12-22 10:30:47,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:30:47,294 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:30:47,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:47,295 INFO L225 Difference]: With dead ends: 441 [2020-12-22 10:30:47,295 INFO L226 Difference]: Without dead ends: 407 [2020-12-22 10:30:47,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=453, Invalid=1026, Unknown=3, NotChecked=0, Total=1482 [2020-12-22 10:30:47,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-12-22 10:30:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 249. [2020-12-22 10:30:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-12-22 10:30:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 662 transitions. [2020-12-22 10:30:47,303 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 662 transitions. Word has length 14 [2020-12-22 10:30:47,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:47,303 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 662 transitions. [2020-12-22 10:30:47,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:30:47,303 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 662 transitions. [2020-12-22 10:30:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:30:47,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:47,304 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:47,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-12-22 10:30:47,505 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:47,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:47,506 INFO L82 PathProgramCache]: Analyzing trace with hash -915650353, now seen corresponding path program 142 times [2020-12-22 10:30:47,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:47,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241587753] [2020-12-22 10:30:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:47,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241587753] [2020-12-22 10:30:47,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647683956] [2020-12-22 10:30:47,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:47,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:30:47,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:47,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:30:47,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:48,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:48,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-22 10:30:48,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637274593] [2020-12-22 10:30:48,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:30:48,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:48,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:30:48,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:30:48,410 INFO L87 Difference]: Start difference. First operand 249 states and 662 transitions. Second operand 20 states. [2020-12-22 10:30:49,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:49,268 INFO L93 Difference]: Finished difference Result 337 states and 838 transitions. [2020-12-22 10:30:49,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:30:49,269 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-22 10:30:49,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:49,271 INFO L225 Difference]: With dead ends: 337 [2020-12-22 10:30:49,271 INFO L226 Difference]: Without dead ends: 334 [2020-12-22 10:30:49,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:30:49,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-12-22 10:30:49,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 255. [2020-12-22 10:30:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-12-22 10:30:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 674 transitions. [2020-12-22 10:30:49,275 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 674 transitions. Word has length 15 [2020-12-22 10:30:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:49,275 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 674 transitions. [2020-12-22 10:30:49,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:30:49,276 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 674 transitions. [2020-12-22 10:30:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:30:49,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:49,276 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:49,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-12-22 10:30:49,479 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:49,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:49,479 INFO L82 PathProgramCache]: Analyzing trace with hash -645743893, now seen corresponding path program 143 times [2020-12-22 10:30:49,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:49,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676173108] [2020-12-22 10:30:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:49,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676173108] [2020-12-22 10:30:49,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212504028] [2020-12-22 10:30:49,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:49,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:30:49,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:49,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:30:49,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:50,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:50,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-22 10:30:50,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270802666] [2020-12-22 10:30:50,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:30:50,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:50,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:30:50,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:30:50,293 INFO L87 Difference]: Start difference. First operand 255 states and 674 transitions. Second operand 20 states. [2020-12-22 10:30:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:51,440 INFO L93 Difference]: Finished difference Result 332 states and 830 transitions. [2020-12-22 10:30:51,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:30:51,441 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-22 10:30:51,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:51,442 INFO L225 Difference]: With dead ends: 332 [2020-12-22 10:30:51,442 INFO L226 Difference]: Without dead ends: 329 [2020-12-22 10:30:51,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:30:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-12-22 10:30:51,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 257. [2020-12-22 10:30:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-22 10:30:51,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 680 transitions. [2020-12-22 10:30:51,447 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 680 transitions. Word has length 15 [2020-12-22 10:30:51,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:51,447 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 680 transitions. [2020-12-22 10:30:51,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:30:51,447 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 680 transitions. [2020-12-22 10:30:51,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:30:51,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:51,448 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:51,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-12-22 10:30:51,648 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:51,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:51,649 INFO L82 PathProgramCache]: Analyzing trace with hash -645138463, now seen corresponding path program 144 times [2020-12-22 10:30:51,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:51,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827842280] [2020-12-22 10:30:51,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:51,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827842280] [2020-12-22 10:30:51,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509061737] [2020-12-22 10:30:51,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:51,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:30:51,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:51,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:30:51,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:52,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:52,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-22 10:30:52,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247384305] [2020-12-22 10:30:52,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:30:52,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:52,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:30:52,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:30:52,625 INFO L87 Difference]: Start difference. First operand 257 states and 680 transitions. Second operand 20 states. [2020-12-22 10:30:53,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:53,799 INFO L93 Difference]: Finished difference Result 332 states and 838 transitions. [2020-12-22 10:30:53,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:30:53,801 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-22 10:30:53,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:53,801 INFO L225 Difference]: With dead ends: 332 [2020-12-22 10:30:53,802 INFO L226 Difference]: Without dead ends: 329 [2020-12-22 10:30:53,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:30:53,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-12-22 10:30:53,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 261. [2020-12-22 10:30:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-12-22 10:30:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 692 transitions. [2020-12-22 10:30:53,807 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 692 transitions. Word has length 15 [2020-12-22 10:30:53,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:53,807 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 692 transitions. [2020-12-22 10:30:53,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:30:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 692 transitions. [2020-12-22 10:30:53,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:30:53,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:53,809 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:54,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:54,024 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:54,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:54,025 INFO L82 PathProgramCache]: Analyzing trace with hash -645117073, now seen corresponding path program 145 times [2020-12-22 10:30:54,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:54,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807677223] [2020-12-22 10:30:54,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:54,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807677223] [2020-12-22 10:30:54,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47682363] [2020-12-22 10:30:54,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:54,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:30:54,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:54,826 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:30:54,828 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:30:54,830 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:54,831 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:54,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:54,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:30:54,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937688428] [2020-12-22 10:30:54,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:30:54,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:54,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:30:54,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:30:54,868 INFO L87 Difference]: Start difference. First operand 261 states and 692 transitions. Second operand 19 states. [2020-12-22 10:30:56,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:56,376 INFO L93 Difference]: Finished difference Result 388 states and 975 transitions. [2020-12-22 10:30:56,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:30:56,379 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-22 10:30:56,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:56,380 INFO L225 Difference]: With dead ends: 388 [2020-12-22 10:30:56,380 INFO L226 Difference]: Without dead ends: 375 [2020-12-22 10:30:56,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=410, Invalid=922, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 10:30:56,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-12-22 10:30:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 254. [2020-12-22 10:30:56,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-12-22 10:30:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 680 transitions. [2020-12-22 10:30:56,385 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 680 transitions. Word has length 15 [2020-12-22 10:30:56,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:56,386 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 680 transitions. [2020-12-22 10:30:56,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:30:56,386 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 680 transitions. [2020-12-22 10:30:56,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:30:56,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:56,386 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:56,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-12-22 10:30:56,587 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:56,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:56,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1203147551, now seen corresponding path program 146 times [2020-12-22 10:30:56,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:56,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683693969] [2020-12-22 10:30:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:56,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683693969] [2020-12-22 10:30:56,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768918492] [2020-12-22 10:30:56,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:56,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:56,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:56,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:30:56,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:57,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:57,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-22 10:30:57,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027215473] [2020-12-22 10:30:57,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:30:57,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:57,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:30:57,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:30:57,486 INFO L87 Difference]: Start difference. First operand 254 states and 680 transitions. Second operand 20 states. [2020-12-22 10:30:58,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:58,669 INFO L93 Difference]: Finished difference Result 371 states and 921 transitions. [2020-12-22 10:30:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:30:58,671 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-22 10:30:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:58,672 INFO L225 Difference]: With dead ends: 371 [2020-12-22 10:30:58,672 INFO L226 Difference]: Without dead ends: 367 [2020-12-22 10:30:58,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=294, Invalid=698, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:30:58,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-12-22 10:30:58,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 259. [2020-12-22 10:30:58,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-22 10:30:58,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 689 transitions. [2020-12-22 10:30:58,678 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 689 transitions. Word has length 15 [2020-12-22 10:30:58,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:58,678 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 689 transitions. [2020-12-22 10:30:58,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:30:58,678 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 689 transitions. [2020-12-22 10:30:58,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:30:58,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:58,679 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:58,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:58,894 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:58,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:58,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1203089891, now seen corresponding path program 147 times [2020-12-22 10:30:58,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:58,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837141349] [2020-12-22 10:30:58,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:59,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837141349] [2020-12-22 10:30:59,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422980313] [2020-12-22 10:30:59,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:59,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:30:59,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:59,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:30:59,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:59,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:59,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-22 10:30:59,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949594247] [2020-12-22 10:30:59,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:30:59,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:59,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:30:59,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:30:59,980 INFO L87 Difference]: Start difference. First operand 259 states and 689 transitions. Second operand 20 states. [2020-12-22 10:31:05,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:05,813 INFO L93 Difference]: Finished difference Result 374 states and 927 transitions. [2020-12-22 10:31:05,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:31:05,815 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-22 10:31:05,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:05,816 INFO L225 Difference]: With dead ends: 374 [2020-12-22 10:31:05,816 INFO L226 Difference]: Without dead ends: 371 [2020-12-22 10:31:05,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:31:05,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-12-22 10:31:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 260. [2020-12-22 10:31:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-12-22 10:31:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 692 transitions. [2020-12-22 10:31:05,821 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 692 transitions. Word has length 15 [2020-12-22 10:31:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:05,821 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 692 transitions. [2020-12-22 10:31:05,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:31:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 692 transitions. [2020-12-22 10:31:05,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:05,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:05,822 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:06,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:06,023 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:06,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:06,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1425981883, now seen corresponding path program 148 times [2020-12-22 10:31:06,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:06,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018536096] [2020-12-22 10:31:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:06,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018536096] [2020-12-22 10:31:06,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179205868] [2020-12-22 10:31:06,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:06,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:31:06,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:06,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:06,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:06,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:06,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-22 10:31:06,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256871556] [2020-12-22 10:31:06,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:31:06,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:06,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:31:06,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:31:06,941 INFO L87 Difference]: Start difference. First operand 260 states and 692 transitions. Second operand 20 states. [2020-12-22 10:31:08,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:08,160 INFO L93 Difference]: Finished difference Result 376 states and 928 transitions. [2020-12-22 10:31:08,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:31:08,162 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-22 10:31:08,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:08,163 INFO L225 Difference]: With dead ends: 376 [2020-12-22 10:31:08,163 INFO L226 Difference]: Without dead ends: 372 [2020-12-22 10:31:08,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:31:08,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-12-22 10:31:08,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 261. [2020-12-22 10:31:08,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-12-22 10:31:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 694 transitions. [2020-12-22 10:31:08,168 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 694 transitions. Word has length 15 [2020-12-22 10:31:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:08,168 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 694 transitions. [2020-12-22 10:31:08,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:31:08,168 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 694 transitions. [2020-12-22 10:31:08,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:08,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:08,168 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:08,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:08,369 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:08,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:08,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1425924223, now seen corresponding path program 149 times [2020-12-22 10:31:08,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:08,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789999884] [2020-12-22 10:31:08,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:08,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789999884] [2020-12-22 10:31:08,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321627460] [2020-12-22 10:31:08,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:08,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:31:08,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:08,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:08,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:09,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:09,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-22 10:31:09,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067659977] [2020-12-22 10:31:09,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:31:09,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:09,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:31:09,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:31:09,460 INFO L87 Difference]: Start difference. First operand 261 states and 694 transitions. Second operand 20 states. [2020-12-22 10:31:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:14,687 INFO L93 Difference]: Finished difference Result 370 states and 917 transitions. [2020-12-22 10:31:14,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:31:14,690 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-22 10:31:14,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:14,691 INFO L225 Difference]: With dead ends: 370 [2020-12-22 10:31:14,691 INFO L226 Difference]: Without dead ends: 367 [2020-12-22 10:31:14,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:31:14,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-12-22 10:31:14,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 260. [2020-12-22 10:31:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-12-22 10:31:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 691 transitions. [2020-12-22 10:31:14,696 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 691 transitions. Word has length 15 [2020-12-22 10:31:14,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:14,696 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 691 transitions. [2020-12-22 10:31:14,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:31:14,696 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 691 transitions. [2020-12-22 10:31:14,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:14,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:14,696 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:14,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2020-12-22 10:31:14,898 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:14,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1407213553, now seen corresponding path program 150 times [2020-12-22 10:31:14,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:14,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851118938] [2020-12-22 10:31:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:15,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851118938] [2020-12-22 10:31:15,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633248926] [2020-12-22 10:31:15,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:15,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:31:15,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:15,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:15,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:15,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:15,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-22 10:31:15,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577006037] [2020-12-22 10:31:15,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:31:15,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:15,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:31:15,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:31:15,988 INFO L87 Difference]: Start difference. First operand 260 states and 691 transitions. Second operand 20 states. [2020-12-22 10:31:17,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:17,686 INFO L93 Difference]: Finished difference Result 377 states and 933 transitions. [2020-12-22 10:31:17,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:31:17,690 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-22 10:31:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:17,691 INFO L225 Difference]: With dead ends: 377 [2020-12-22 10:31:17,691 INFO L226 Difference]: Without dead ends: 373 [2020-12-22 10:31:17,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 10:31:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-12-22 10:31:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 263. [2020-12-22 10:31:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-12-22 10:31:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 700 transitions. [2020-12-22 10:31:17,699 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 700 transitions. Word has length 15 [2020-12-22 10:31:17,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:17,699 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 700 transitions. [2020-12-22 10:31:17,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:31:17,699 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 700 transitions. [2020-12-22 10:31:17,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:17,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:17,700 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:17,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:17,915 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:17,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:17,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1406550463, now seen corresponding path program 151 times [2020-12-22 10:31:17,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:17,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314680142] [2020-12-22 10:31:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:18,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314680142] [2020-12-22 10:31:18,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790530162] [2020-12-22 10:31:18,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:18,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:18,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:18,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:18,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-22 10:31:18,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545460132] [2020-12-22 10:31:18,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:31:18,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:18,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:31:18,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:31:18,921 INFO L87 Difference]: Start difference. First operand 263 states and 700 transitions. Second operand 20 states. [2020-12-22 10:31:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:31:20,823 INFO L93 Difference]: Finished difference Result 380 states and 953 transitions. [2020-12-22 10:31:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:31:20,825 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-22 10:31:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:31:20,826 INFO L225 Difference]: With dead ends: 380 [2020-12-22 10:31:20,826 INFO L226 Difference]: Without dead ends: 376 [2020-12-22 10:31:20,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:31:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-12-22 10:31:20,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 267. [2020-12-22 10:31:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-22 10:31:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 713 transitions. [2020-12-22 10:31:20,833 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 713 transitions. Word has length 15 [2020-12-22 10:31:20,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:31:20,833 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 713 transitions. [2020-12-22 10:31:20,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:31:20,833 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 713 transitions. [2020-12-22 10:31:20,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:31:20,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:31:20,833 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:31:21,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-12-22 10:31:21,034 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:31:21,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:31:21,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1406529073, now seen corresponding path program 152 times [2020-12-22 10:31:21,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:31:21,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739355144] [2020-12-22 10:31:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:31:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:31:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:21,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739355144] [2020-12-22 10:31:21,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920294429] [2020-12-22 10:31:21,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:31:21,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:31:21,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:31:21,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:31:21,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:31:22,097 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:31:22,101 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:31:22,103 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:31:22,107 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-22 10:31:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:31:23,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:31:23,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-22 10:31:23,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614926025] [2020-12-22 10:31:23,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:31:23,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:31:23,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:31:23,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=272, Unknown=1, NotChecked=0, Total=380 [2020-12-22 10:31:23,999 INFO L87 Difference]: Start difference. First operand 267 states and 713 transitions. Second operand 20 states. [2020-12-22 10:31:25,037 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 24 [2020-12-22 10:31:29,797 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 10:31:30,144 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 16 [2020-12-22 10:31:32,350 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 48 [2020-12-22 10:31:42,812 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 10:31:43,737 WARN L197 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 25