/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-6f57305 [2021-01-26 14:17:03,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-26 14:17:03,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-26 14:17:03,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-26 14:17:03,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-26 14:17:03,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-26 14:17:03,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-26 14:17:03,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-26 14:17:03,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-26 14:17:03,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-26 14:17:03,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-26 14:17:03,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-26 14:17:03,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-26 14:17:03,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-26 14:17:03,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-26 14:17:03,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-26 14:17:03,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-26 14:17:03,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-26 14:17:03,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-26 14:17:03,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-26 14:17:03,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-26 14:17:03,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-26 14:17:03,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-26 14:17:03,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-26 14:17:03,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-26 14:17:03,862 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-26 14:17:03,862 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-26 14:17:03,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-26 14:17:03,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-26 14:17:03,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-26 14:17:03,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-26 14:17:03,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-26 14:17:03,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-26 14:17:03,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-26 14:17:03,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-26 14:17:03,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-26 14:17:03,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-26 14:17:03,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-26 14:17:03,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-26 14:17:03,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-26 14:17:03,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-26 14:17:03,880 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-01-26 14:17:03,940 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-26 14:17:03,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-26 14:17:03,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-26 14:17:03,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-26 14:17:03,945 INFO L138 SettingsManager]: * Use SBE=true [2021-01-26 14:17:03,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-26 14:17:03,946 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-26 14:17:03,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-26 14:17:03,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-26 14:17:03,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-26 14:17:03,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-26 14:17:03,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-26 14:17:03,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-26 14:17:03,949 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-26 14:17:03,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-26 14:17:03,949 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-26 14:17:03,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-26 14:17:03,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-26 14:17:03,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-26 14:17:03,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-26 14:17:03,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-26 14:17:03,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-26 14:17:03,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-26 14:17:03,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-26 14:17:03,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-26 14:17:03,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-26 14:17:03,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-26 14:17:03,952 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-26 14:17:03,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-26 14:17:03,953 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-26 14:17:03,953 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-26 14:17:04,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-26 14:17:04,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-26 14:17:04,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-26 14:17:04,525 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-26 14:17:04,525 INFO L275 PluginConnector]: CDTParser initialized [2021-01-26 14:17:04,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2021-01-26 14:17:04,617 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fe3e8479/936fbebe66fd4f4bb5fab95db9d9ec7e/FLAGad669e65a [2021-01-26 14:17:05,311 INFO L306 CDTParser]: Found 1 translation units. [2021-01-26 14:17:05,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2021-01-26 14:17:05,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fe3e8479/936fbebe66fd4f4bb5fab95db9d9ec7e/FLAGad669e65a [2021-01-26 14:17:05,609 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fe3e8479/936fbebe66fd4f4bb5fab95db9d9ec7e [2021-01-26 14:17:05,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-26 14:17:05,624 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-26 14:17:05,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-26 14:17:05,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-26 14:17:05,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-26 14:17:05,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.01 02:17:05" (1/1) ... [2021-01-26 14:17:05,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5549dadf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:05, skipping insertion in model container [2021-01-26 14:17:05,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.01 02:17:05" (1/1) ... [2021-01-26 14:17:05,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-26 14:17:05,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-26 14:17:06,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-26 14:17:06,215 INFO L203 MainTranslator]: Completed pre-run [2021-01-26 14:17:06,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-26 14:17:06,478 INFO L208 MainTranslator]: Completed translation [2021-01-26 14:17:06,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06 WrapperNode [2021-01-26 14:17:06,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-26 14:17:06,480 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-26 14:17:06,480 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-26 14:17:06,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-26 14:17:06,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,528 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-26 14:17:06,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-26 14:17:06,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-26 14:17:06,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-26 14:17:06,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-26 14:17:06,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-26 14:17:06,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-26 14:17:06,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-26 14:17:06,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-26 14:17:06,644 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-26 14:17:06,645 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-26 14:17:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-26 14:17:06,645 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-26 14:17:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-26 14:17:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-26 14:17:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-26 14:17:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-26 14:17:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-26 14:17:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-26 14:17:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-26 14:17:06,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-26 14:17:06,648 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-26 14:17:07,119 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-26 14:17:07,120 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-26 14:17:07,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.01 02:17:07 BoogieIcfgContainer [2021-01-26 14:17:07,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-26 14:17:07,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-26 14:17:07,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-26 14:17:07,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-26 14:17:07,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.01 02:17:05" (1/3) ... [2021-01-26 14:17:07,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bffebb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.01 02:17:07, skipping insertion in model container [2021-01-26 14:17:07,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (2/3) ... [2021-01-26 14:17:07,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bffebb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.01 02:17:07, skipping insertion in model container [2021-01-26 14:17:07,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.01 02:17:07" (3/3) ... [2021-01-26 14:17:07,131 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2021-01-26 14:17:07,149 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-26 14:17:07,149 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-26 14:17:07,153 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-26 14:17:07,154 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-26 14:17:07,190 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,190 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,191 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,191 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,191 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,191 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,191 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,192 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,192 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,192 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,192 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,193 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,193 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,193 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,193 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,193 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,194 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,194 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,194 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,194 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,195 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,195 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,195 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,195 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,195 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,196 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,196 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,196 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,196 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,196 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,197 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,197 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,197 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,197 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,198 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,198 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,198 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,198 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,198 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,199 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,199 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,199 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,199 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,200 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,200 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,200 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,200 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,201 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,201 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,201 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,201 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,202 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,202 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,202 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,202 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,202 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,202 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,203 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,203 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,203 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,205 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,206 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,206 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,206 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,207 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,207 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,215 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,216 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,216 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,216 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,216 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,217 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,220 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-26 14:17:07,234 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-26 14:17:07,259 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-26 14:17:07,260 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-26 14:17:07,260 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-26 14:17:07,260 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-26 14:17:07,260 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-26 14:17:07,260 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-26 14:17:07,261 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-26 14:17:07,261 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-26 14:17:07,273 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2021-01-26 14:17:07,428 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:07,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-26 14:17:07,455 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:07,456 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:07,456 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:07,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:07,463 INFO L82 PathProgramCache]: Analyzing trace with hash 811106412, now seen corresponding path program 1 times [2021-01-26 14:17:07,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:07,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190120607] [2021-01-26 14:17:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:07,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190120607] [2021-01-26 14:17:07,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:07,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-26 14:17:07,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447668288] [2021-01-26 14:17:07,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-26 14:17:07,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:08,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-26 14:17:08,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-26 14:17:08,023 INFO L87 Difference]: Start difference. First operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:08,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:08,312 INFO L93 Difference]: Finished difference Result 4034 states and 11738 transitions. [2021-01-26 14:17:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-26 14:17:08,315 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-01-26 14:17:08,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:08,349 INFO L225 Difference]: With dead ends: 4034 [2021-01-26 14:17:08,349 INFO L226 Difference]: Without dead ends: 1472 [2021-01-26 14:17:08,351 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-26 14:17:08,351 INFO L78 Accepts]: Start accepts. Automaton has 1472 states. Word has length 28 [2021-01-26 14:17:08,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:08,353 INFO L481 AbstractCegarLoop]: Abstraction has 1472 states. [2021-01-26 14:17:08,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:08,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states. [2021-01-26 14:17:08,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-26 14:17:08,364 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:08,364 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:08,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-26 14:17:08,364 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:08,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:08,366 INFO L82 PathProgramCache]: Analyzing trace with hash -2008820546, now seen corresponding path program 1 times [2021-01-26 14:17:08,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:08,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091639504] [2021-01-26 14:17:08,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:08,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091639504] [2021-01-26 14:17:08,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:08,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-26 14:17:08,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667041031] [2021-01-26 14:17:08,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-26 14:17:08,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:08,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-26 14:17:08,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-26 14:17:08,631 INFO L87 Difference]: Start difference. First operand 1472 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:08,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:08,861 INFO L93 Difference]: Finished difference Result 1984 states and 5365 transitions. [2021-01-26 14:17:08,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-26 14:17:08,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-26 14:17:08,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:08,876 INFO L225 Difference]: With dead ends: 1984 [2021-01-26 14:17:08,877 INFO L226 Difference]: Without dead ends: 1726 [2021-01-26 14:17:08,878 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-26 14:17:08,878 INFO L78 Accepts]: Start accepts. Automaton has 1726 states. Word has length 33 [2021-01-26 14:17:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:08,878 INFO L481 AbstractCegarLoop]: Abstraction has 1726 states. [2021-01-26 14:17:08,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:08,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states. [2021-01-26 14:17:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-26 14:17:08,883 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:08,883 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:08,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-26 14:17:08,883 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:08,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:08,884 INFO L82 PathProgramCache]: Analyzing trace with hash 103991554, now seen corresponding path program 1 times [2021-01-26 14:17:08,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:08,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310999395] [2021-01-26 14:17:08,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:09,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310999395] [2021-01-26 14:17:09,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:09,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-26 14:17:09,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715382129] [2021-01-26 14:17:09,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-26 14:17:09,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:09,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-26 14:17:09,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-26 14:17:09,090 INFO L87 Difference]: Start difference. First operand 1726 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:09,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:09,254 INFO L93 Difference]: Finished difference Result 2110 states and 5584 transitions. [2021-01-26 14:17:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-26 14:17:09,255 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-26 14:17:09,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:09,269 INFO L225 Difference]: With dead ends: 2110 [2021-01-26 14:17:09,269 INFO L226 Difference]: Without dead ends: 1806 [2021-01-26 14:17:09,270 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-26 14:17:09,270 INFO L78 Accepts]: Start accepts. Automaton has 1806 states. Word has length 33 [2021-01-26 14:17:09,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:09,271 INFO L481 AbstractCegarLoop]: Abstraction has 1806 states. [2021-01-26 14:17:09,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states. [2021-01-26 14:17:09,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-26 14:17:09,274 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:09,274 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:09,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-26 14:17:09,274 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:09,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:09,275 INFO L82 PathProgramCache]: Analyzing trace with hash -899974956, now seen corresponding path program 2 times [2021-01-26 14:17:09,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:09,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088739071] [2021-01-26 14:17:09,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:09,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088739071] [2021-01-26 14:17:09,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:09,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-26 14:17:09,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30462362] [2021-01-26 14:17:09,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-26 14:17:09,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:09,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-26 14:17:09,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-26 14:17:09,407 INFO L87 Difference]: Start difference. First operand 1806 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:09,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:09,581 INFO L93 Difference]: Finished difference Result 2318 states and 6128 transitions. [2021-01-26 14:17:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-26 14:17:09,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-26 14:17:09,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:09,598 INFO L225 Difference]: With dead ends: 2318 [2021-01-26 14:17:09,598 INFO L226 Difference]: Without dead ends: 1996 [2021-01-26 14:17:09,598 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:17:09,599 INFO L78 Accepts]: Start accepts. Automaton has 1996 states. Word has length 33 [2021-01-26 14:17:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:09,600 INFO L481 AbstractCegarLoop]: Abstraction has 1996 states. [2021-01-26 14:17:09,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states. [2021-01-26 14:17:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:09,604 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:09,605 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:09,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-26 14:17:09,605 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:09,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:09,606 INFO L82 PathProgramCache]: Analyzing trace with hash -421493469, now seen corresponding path program 1 times [2021-01-26 14:17:09,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:09,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404311281] [2021-01-26 14:17:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:09,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404311281] [2021-01-26 14:17:09,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638857434] [2021-01-26 14:17:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:09,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-26 14:17:09,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:10,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:10,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:10,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:10,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-26 14:17:10,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090445749] [2021-01-26 14:17:10,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-26 14:17:10,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:10,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-26 14:17:10,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-26 14:17:10,160 INFO L87 Difference]: Start difference. First operand 1996 states. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:10,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:10,465 INFO L93 Difference]: Finished difference Result 2908 states and 7595 transitions. [2021-01-26 14:17:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-26 14:17:10,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-26 14:17:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:10,485 INFO L225 Difference]: With dead ends: 2908 [2021-01-26 14:17:10,485 INFO L226 Difference]: Without dead ends: 2544 [2021-01-26 14:17:10,485 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:17:10,486 INFO L78 Accepts]: Start accepts. Automaton has 2544 states. Word has length 38 [2021-01-26 14:17:10,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:10,486 INFO L481 AbstractCegarLoop]: Abstraction has 2544 states. [2021-01-26 14:17:10,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states. [2021-01-26 14:17:10,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:10,490 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:10,490 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:10,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:10,705 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:10,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:10,706 INFO L82 PathProgramCache]: Analyzing trace with hash -869705744, now seen corresponding path program 1 times [2021-01-26 14:17:10,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:10,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060727063] [2021-01-26 14:17:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:10,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060727063] [2021-01-26 14:17:10,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:10,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-26 14:17:10,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143113472] [2021-01-26 14:17:10,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-26 14:17:10,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:10,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-26 14:17:10,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-26 14:17:10,908 INFO L87 Difference]: Start difference. First operand 2544 states. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:11,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:11,057 INFO L93 Difference]: Finished difference Result 2736 states and 7057 transitions. [2021-01-26 14:17:11,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-26 14:17:11,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-26 14:17:11,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:11,078 INFO L225 Difference]: With dead ends: 2736 [2021-01-26 14:17:11,078 INFO L226 Difference]: Without dead ends: 2584 [2021-01-26 14:17:11,079 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-01-26 14:17:11,079 INFO L78 Accepts]: Start accepts. Automaton has 2584 states. Word has length 38 [2021-01-26 14:17:11,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:11,079 INFO L481 AbstractCegarLoop]: Abstraction has 2584 states. [2021-01-26 14:17:11,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:11,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states. [2021-01-26 14:17:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:11,084 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:11,084 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:11,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-26 14:17:11,085 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1873672254, now seen corresponding path program 2 times [2021-01-26 14:17:11,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:11,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375367744] [2021-01-26 14:17:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:11,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375367744] [2021-01-26 14:17:11,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:11,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-26 14:17:11,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160435219] [2021-01-26 14:17:11,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-26 14:17:11,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:11,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-26 14:17:11,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-26 14:17:11,249 INFO L87 Difference]: Start difference. First operand 2584 states. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:11,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:11,478 INFO L93 Difference]: Finished difference Result 3152 states and 8081 transitions. [2021-01-26 14:17:11,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-26 14:17:11,479 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-26 14:17:11,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:11,499 INFO L225 Difference]: With dead ends: 3152 [2021-01-26 14:17:11,499 INFO L226 Difference]: Without dead ends: 2894 [2021-01-26 14:17:11,500 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:17:11,500 INFO L78 Accepts]: Start accepts. Automaton has 2894 states. Word has length 38 [2021-01-26 14:17:11,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:11,500 INFO L481 AbstractCegarLoop]: Abstraction has 2894 states. [2021-01-26 14:17:11,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states. [2021-01-26 14:17:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:11,505 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:11,505 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:11,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-26 14:17:11,506 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:11,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:11,507 INFO L82 PathProgramCache]: Analyzing trace with hash 587213024, now seen corresponding path program 3 times [2021-01-26 14:17:11,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:11,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059502660] [2021-01-26 14:17:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:11,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059502660] [2021-01-26 14:17:11,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:11,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-26 14:17:11,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94054436] [2021-01-26 14:17:11,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-26 14:17:11,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:11,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-26 14:17:11,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-26 14:17:11,641 INFO L87 Difference]: Start difference. First operand 2894 states. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:11,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:11,894 INFO L93 Difference]: Finished difference Result 3742 states and 9548 transitions. [2021-01-26 14:17:11,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-26 14:17:11,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-26 14:17:11,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:11,929 INFO L225 Difference]: With dead ends: 3742 [2021-01-26 14:17:11,930 INFO L226 Difference]: Without dead ends: 3314 [2021-01-26 14:17:11,930 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-01-26 14:17:11,930 INFO L78 Accepts]: Start accepts. Automaton has 3314 states. Word has length 38 [2021-01-26 14:17:11,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:11,931 INFO L481 AbstractCegarLoop]: Abstraction has 3314 states. [2021-01-26 14:17:11,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:11,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3314 states. [2021-01-26 14:17:11,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:11,937 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:11,937 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:11,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-26 14:17:11,938 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:11,938 INFO L82 PathProgramCache]: Analyzing trace with hash 810819243, now seen corresponding path program 1 times [2021-01-26 14:17:11,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:11,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803536885] [2021-01-26 14:17:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:12,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803536885] [2021-01-26 14:17:12,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735023003] [2021-01-26 14:17:12,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:12,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:12,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:12,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:12,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:12,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:12,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062714475] [2021-01-26 14:17:12,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:12,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:12,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:12,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:12,324 INFO L87 Difference]: Start difference. First operand 3314 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:12,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:12,687 INFO L93 Difference]: Finished difference Result 3506 states and 8882 transitions. [2021-01-26 14:17:12,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-26 14:17:12,688 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-26 14:17:12,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:12,699 INFO L225 Difference]: With dead ends: 3506 [2021-01-26 14:17:12,699 INFO L226 Difference]: Without dead ends: 3354 [2021-01-26 14:17:12,700 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:12,700 INFO L78 Accepts]: Start accepts. Automaton has 3354 states. Word has length 43 [2021-01-26 14:17:12,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:12,701 INFO L481 AbstractCegarLoop]: Abstraction has 3354 states. [2021-01-26 14:17:12,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states. [2021-01-26 14:17:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:12,709 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:12,709 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:12,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:12,924 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:12,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:12,924 INFO L82 PathProgramCache]: Analyzing trace with hash -193147267, now seen corresponding path program 2 times [2021-01-26 14:17:12,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:12,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662016364] [2021-01-26 14:17:12,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:13,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662016364] [2021-01-26 14:17:13,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740549881] [2021-01-26 14:17:13,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:13,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:13,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:13,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:13,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:13,278 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:13,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:13,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:13,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:13,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740120153] [2021-01-26 14:17:13,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:13,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:13,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:13,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:13,340 INFO L87 Difference]: Start difference. First operand 3354 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:13,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:13,851 INFO L93 Difference]: Finished difference Result 4338 states and 10930 transitions. [2021-01-26 14:17:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:17:13,852 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-26 14:17:13,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:13,864 INFO L225 Difference]: With dead ends: 4338 [2021-01-26 14:17:13,865 INFO L226 Difference]: Without dead ends: 3974 [2021-01-26 14:17:13,866 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-01-26 14:17:13,866 INFO L78 Accepts]: Start accepts. Automaton has 3974 states. Word has length 43 [2021-01-26 14:17:13,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:13,866 INFO L481 AbstractCegarLoop]: Abstraction has 3974 states. [2021-01-26 14:17:13,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:13,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states. [2021-01-26 14:17:13,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:13,873 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:13,874 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:14,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-26 14:17:14,089 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:14,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:14,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2089322251, now seen corresponding path program 1 times [2021-01-26 14:17:14,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:14,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125337381] [2021-01-26 14:17:14,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:14,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125337381] [2021-01-26 14:17:14,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441773021] [2021-01-26 14:17:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:14,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:14,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:14,532 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:14,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:14,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:14,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587004899] [2021-01-26 14:17:14,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:14,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:14,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:14,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:14,544 INFO L87 Difference]: Start difference. First operand 3974 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:15,004 INFO L93 Difference]: Finished difference Result 4598 states and 11320 transitions. [2021-01-26 14:17:15,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-26 14:17:15,005 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-26 14:17:15,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:15,015 INFO L225 Difference]: With dead ends: 4598 [2021-01-26 14:17:15,015 INFO L226 Difference]: Without dead ends: 4294 [2021-01-26 14:17:15,016 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:17:15,016 INFO L78 Accepts]: Start accepts. Automaton has 4294 states. Word has length 43 [2021-01-26 14:17:15,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:15,017 INFO L481 AbstractCegarLoop]: Abstraction has 4294 states. [2021-01-26 14:17:15,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states. [2021-01-26 14:17:15,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:15,024 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:15,024 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:15,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:15,240 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:15,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:15,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1853174015, now seen corresponding path program 2 times [2021-01-26 14:17:15,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:15,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536617292] [2021-01-26 14:17:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:15,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536617292] [2021-01-26 14:17:15,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118759857] [2021-01-26 14:17:15,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:15,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:15,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:15,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:15,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:15,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:15,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:15,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:15,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143232431] [2021-01-26 14:17:15,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:15,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:15,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:15,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:15,585 INFO L87 Difference]: Start difference. First operand 4294 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:15,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:15,998 INFO L93 Difference]: Finished difference Result 4758 states and 11640 transitions. [2021-01-26 14:17:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:17:15,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-26 14:17:15,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:16,009 INFO L225 Difference]: With dead ends: 4758 [2021-01-26 14:17:16,009 INFO L226 Difference]: Without dead ends: 4454 [2021-01-26 14:17:16,010 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-01-26 14:17:16,010 INFO L78 Accepts]: Start accepts. Automaton has 4454 states. Word has length 43 [2021-01-26 14:17:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:16,010 INFO L481 AbstractCegarLoop]: Abstraction has 4454 states. [2021-01-26 14:17:16,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:16,011 INFO L276 IsEmpty]: Start isEmpty. Operand 4454 states. [2021-01-26 14:17:16,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:16,017 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:16,017 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:16,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-26 14:17:16,232 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:16,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2013675815, now seen corresponding path program 3 times [2021-01-26 14:17:16,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:16,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448788898] [2021-01-26 14:17:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:16,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448788898] [2021-01-26 14:17:16,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223246725] [2021-01-26 14:17:16,390 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:16,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-26 14:17:16,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:16,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:16,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:16,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:16,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:16,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:16,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:16,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942655174] [2021-01-26 14:17:16,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:16,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:16,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:16,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:16,640 INFO L87 Difference]: Start difference. First operand 4454 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:17,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:17,384 INFO L93 Difference]: Finished difference Result 6124 states and 15171 transitions. [2021-01-26 14:17:17,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-26 14:17:17,384 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-26 14:17:17,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:17,399 INFO L225 Difference]: With dead ends: 6124 [2021-01-26 14:17:17,400 INFO L226 Difference]: Without dead ends: 5484 [2021-01-26 14:17:17,401 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2021-01-26 14:17:17,401 INFO L78 Accepts]: Start accepts. Automaton has 5484 states. Word has length 43 [2021-01-26 14:17:17,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:17,401 INFO L481 AbstractCegarLoop]: Abstraction has 5484 states. [2021-01-26 14:17:17,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:17,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states. [2021-01-26 14:17:17,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:17,412 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:17,413 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:17,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:17,626 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:17,627 INFO L82 PathProgramCache]: Analyzing trace with hash 264667651, now seen corresponding path program 2 times [2021-01-26 14:17:17,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:17,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304674853] [2021-01-26 14:17:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:17,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304674853] [2021-01-26 14:17:17,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428889113] [2021-01-26 14:17:17,839 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:17,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:17,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:17,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:17,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:18,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:18,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:18,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:18,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-26 14:17:18,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824533401] [2021-01-26 14:17:18,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-26 14:17:18,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:18,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-26 14:17:18,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-26 14:17:18,125 INFO L87 Difference]: Start difference. First operand 5484 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:18,562 INFO L93 Difference]: Finished difference Result 6556 states and 16031 transitions. [2021-01-26 14:17:18,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-26 14:17:18,563 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:18,580 INFO L225 Difference]: With dead ends: 6556 [2021-01-26 14:17:18,580 INFO L226 Difference]: Without dead ends: 6192 [2021-01-26 14:17:18,581 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-01-26 14:17:18,581 INFO L78 Accepts]: Start accepts. Automaton has 6192 states. Word has length 48 [2021-01-26 14:17:18,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:18,581 INFO L481 AbstractCegarLoop]: Abstraction has 6192 states. [2021-01-26 14:17:18,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:18,582 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states. [2021-01-26 14:17:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:18,594 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:18,594 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:18,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-26 14:17:18,808 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:18,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:18,809 INFO L82 PathProgramCache]: Analyzing trace with hash -183544624, now seen corresponding path program 3 times [2021-01-26 14:17:18,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:18,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919143207] [2021-01-26 14:17:18,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:19,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919143207] [2021-01-26 14:17:19,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910849783] [2021-01-26 14:17:19,001 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:19,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:17:19,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:19,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:19,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:19,244 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:19,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:19,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:19,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134130806] [2021-01-26 14:17:19,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:19,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:19,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:19,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:19,264 INFO L87 Difference]: Start difference. First operand 6192 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:19,536 INFO L93 Difference]: Finished difference Result 6384 states and 15493 transitions. [2021-01-26 14:17:19,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-26 14:17:19,537 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:19,555 INFO L225 Difference]: With dead ends: 6384 [2021-01-26 14:17:19,555 INFO L226 Difference]: Without dead ends: 6232 [2021-01-26 14:17:19,557 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:17:19,557 INFO L78 Accepts]: Start accepts. Automaton has 6232 states. Word has length 48 [2021-01-26 14:17:19,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:19,558 INFO L481 AbstractCegarLoop]: Abstraction has 6232 states. [2021-01-26 14:17:19,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states. [2021-01-26 14:17:19,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:19,571 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:19,571 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:19,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-26 14:17:19,785 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:19,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1187511134, now seen corresponding path program 4 times [2021-01-26 14:17:19,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:19,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958502776] [2021-01-26 14:17:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:19,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958502776] [2021-01-26 14:17:19,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17633437] [2021-01-26 14:17:19,944 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:20,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:17:20,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:20,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:20,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:20,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:20,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:20,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:20,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:20,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585244371] [2021-01-26 14:17:20,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:20,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:20,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:20,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:20,243 INFO L87 Difference]: Start difference. First operand 6232 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:20,898 INFO L93 Difference]: Finished difference Result 7096 states and 17301 transitions. [2021-01-26 14:17:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-26 14:17:20,898 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:20,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:20,915 INFO L225 Difference]: With dead ends: 7096 [2021-01-26 14:17:20,916 INFO L226 Difference]: Without dead ends: 6732 [2021-01-26 14:17:20,916 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:17:20,917 INFO L78 Accepts]: Start accepts. Automaton has 6732 states. Word has length 48 [2021-01-26 14:17:20,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:20,917 INFO L481 AbstractCegarLoop]: Abstraction has 6732 states. [2021-01-26 14:17:20,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:20,917 INFO L276 IsEmpty]: Start isEmpty. Operand 6732 states. [2021-01-26 14:17:20,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:20,927 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:20,927 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:21,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-26 14:17:21,141 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:21,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:21,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1211281178, now seen corresponding path program 1 times [2021-01-26 14:17:21,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:21,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807625535] [2021-01-26 14:17:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:21,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:21,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807625535] [2021-01-26 14:17:21,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211694070] [2021-01-26 14:17:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:21,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:21,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:21,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:21,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:21,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:21,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79960965] [2021-01-26 14:17:21,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:21,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:21,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:21,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:21,514 INFO L87 Difference]: Start difference. First operand 6732 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:21,888 INFO L93 Difference]: Finished difference Result 7044 states and 17003 transitions. [2021-01-26 14:17:21,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-26 14:17:21,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:21,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:21,907 INFO L225 Difference]: With dead ends: 7044 [2021-01-26 14:17:21,907 INFO L226 Difference]: Without dead ends: 6892 [2021-01-26 14:17:21,908 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-01-26 14:17:21,908 INFO L78 Accepts]: Start accepts. Automaton has 6892 states. Word has length 48 [2021-01-26 14:17:21,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:21,909 INFO L481 AbstractCegarLoop]: Abstraction has 6892 states. [2021-01-26 14:17:21,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:21,909 INFO L276 IsEmpty]: Start isEmpty. Operand 6892 states. [2021-01-26 14:17:21,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:21,919 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:21,919 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:22,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-26 14:17:22,135 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:22,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1447429414, now seen corresponding path program 2 times [2021-01-26 14:17:22,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:22,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715151937] [2021-01-26 14:17:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:22,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715151937] [2021-01-26 14:17:22,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236047943] [2021-01-26 14:17:22,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:22,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:22,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:22,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:22,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:22,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:22,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:22,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:22,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227533962] [2021-01-26 14:17:22,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:22,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:22,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:22,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:22,506 INFO L87 Difference]: Start difference. First operand 6892 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:22,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:22,984 INFO L93 Difference]: Finished difference Result 7124 states and 17163 transitions. [2021-01-26 14:17:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:17:22,985 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:22,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:23,002 INFO L225 Difference]: With dead ends: 7124 [2021-01-26 14:17:23,003 INFO L226 Difference]: Without dead ends: 6972 [2021-01-26 14:17:23,003 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-01-26 14:17:23,003 INFO L78 Accepts]: Start accepts. Automaton has 6972 states. Word has length 48 [2021-01-26 14:17:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:23,004 INFO L481 AbstractCegarLoop]: Abstraction has 6972 states. [2021-01-26 14:17:23,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:23,004 INFO L276 IsEmpty]: Start isEmpty. Operand 6972 states. [2021-01-26 14:17:23,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:23,013 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:23,013 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:23,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-26 14:17:23,227 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:23,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1019311948, now seen corresponding path program 3 times [2021-01-26 14:17:23,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:23,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397760175] [2021-01-26 14:17:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:23,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397760175] [2021-01-26 14:17:23,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263483888] [2021-01-26 14:17:23,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:23,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-26 14:17:23,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:23,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:23,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:23,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:23,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:23,734 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:23,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:23,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:23,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-26 14:17:23,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35608853] [2021-01-26 14:17:23,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-26 14:17:23,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:23,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-26 14:17:23,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-01-26 14:17:23,786 INFO L87 Difference]: Start difference. First operand 6972 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:24,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:24,943 INFO L93 Difference]: Finished difference Result 9334 states and 22444 transitions. [2021-01-26 14:17:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-26 14:17:24,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:24,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:24,957 INFO L225 Difference]: With dead ends: 9334 [2021-01-26 14:17:24,957 INFO L226 Difference]: Without dead ends: 8642 [2021-01-26 14:17:24,958 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=1727, Unknown=0, NotChecked=0, Total=2162 [2021-01-26 14:17:24,958 INFO L78 Accepts]: Start accepts. Automaton has 8642 states. Word has length 48 [2021-01-26 14:17:24,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:24,958 INFO L481 AbstractCegarLoop]: Abstraction has 8642 states. [2021-01-26 14:17:24,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:24,959 INFO L276 IsEmpty]: Start isEmpty. Operand 8642 states. [2021-01-26 14:17:24,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:24,969 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:24,970 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:25,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:25,184 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:25,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:25,185 INFO L82 PathProgramCache]: Analyzing trace with hash 310617624, now seen corresponding path program 4 times [2021-01-26 14:17:25,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:25,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955394773] [2021-01-26 14:17:25,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:25,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955394773] [2021-01-26 14:17:25,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931107101] [2021-01-26 14:17:25,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:25,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:17:25,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:25,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:25,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:25,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:25,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:25,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:25,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265027217] [2021-01-26 14:17:25,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:25,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:25,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:25,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:25,610 INFO L87 Difference]: Start difference. First operand 8642 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:26,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:26,033 INFO L93 Difference]: Finished difference Result 9234 states and 21858 transitions. [2021-01-26 14:17:26,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-26 14:17:26,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:26,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:26,046 INFO L225 Difference]: With dead ends: 9234 [2021-01-26 14:17:26,046 INFO L226 Difference]: Without dead ends: 9082 [2021-01-26 14:17:26,047 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-01-26 14:17:26,047 INFO L78 Accepts]: Start accepts. Automaton has 9082 states. Word has length 48 [2021-01-26 14:17:26,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:26,047 INFO L481 AbstractCegarLoop]: Abstraction has 9082 states. [2021-01-26 14:17:26,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:26,047 INFO L276 IsEmpty]: Start isEmpty. Operand 9082 states. [2021-01-26 14:17:26,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:26,057 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:26,057 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:26,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-01-26 14:17:26,258 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:26,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:26,259 INFO L82 PathProgramCache]: Analyzing trace with hash -958721652, now seen corresponding path program 5 times [2021-01-26 14:17:26,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:26,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667522352] [2021-01-26 14:17:26,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:26,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:26,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667522352] [2021-01-26 14:17:26,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265758200] [2021-01-26 14:17:26,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:26,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:26,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:26,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:26,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:26,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:26,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:26,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:26,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724418950] [2021-01-26 14:17:26,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:26,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:26,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:26,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:26,621 INFO L87 Difference]: Start difference. First operand 9082 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:27,172 INFO L93 Difference]: Finished difference Result 9674 states and 22738 transitions. [2021-01-26 14:17:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-26 14:17:27,173 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:27,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:27,184 INFO L225 Difference]: With dead ends: 9674 [2021-01-26 14:17:27,184 INFO L226 Difference]: Without dead ends: 9522 [2021-01-26 14:17:27,184 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:17:27,184 INFO L78 Accepts]: Start accepts. Automaton has 9522 states. Word has length 48 [2021-01-26 14:17:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:27,185 INFO L481 AbstractCegarLoop]: Abstraction has 9522 states. [2021-01-26 14:17:27,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 9522 states. [2021-01-26 14:17:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:27,193 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:27,193 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:27,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:27,399 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:27,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:27,399 INFO L82 PathProgramCache]: Analyzing trace with hash 763359212, now seen corresponding path program 6 times [2021-01-26 14:17:27,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:27,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714981428] [2021-01-26 14:17:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:27,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714981428] [2021-01-26 14:17:27,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969157588] [2021-01-26 14:17:27,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:27,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-26 14:17:27,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:27,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:27,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:27,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:27,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:27,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:27,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637401679] [2021-01-26 14:17:27,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:27,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:27,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:27,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:27,761 INFO L87 Difference]: Start difference. First operand 9522 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:28,520 INFO L93 Difference]: Finished difference Result 10144 states and 23773 transitions. [2021-01-26 14:17:28,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:17:28,521 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:28,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:28,533 INFO L225 Difference]: With dead ends: 10144 [2021-01-26 14:17:28,533 INFO L226 Difference]: Without dead ends: 9992 [2021-01-26 14:17:28,534 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:17:28,534 INFO L78 Accepts]: Start accepts. Automaton has 9992 states. Word has length 48 [2021-01-26 14:17:28,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:28,534 INFO L481 AbstractCegarLoop]: Abstraction has 9992 states. [2021-01-26 14:17:28,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:28,535 INFO L276 IsEmpty]: Start isEmpty. Operand 9992 states. [2021-01-26 14:17:28,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:28,544 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:28,545 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:28,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-26 14:17:28,750 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:28,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:28,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1519359984, now seen corresponding path program 7 times [2021-01-26 14:17:28,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:28,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418231994] [2021-01-26 14:17:28,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:28,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418231994] [2021-01-26 14:17:28,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973877859] [2021-01-26 14:17:28,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:28,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:28,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:29,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:29,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:29,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:29,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-26 14:17:29,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96106447] [2021-01-26 14:17:29,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-26 14:17:29,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:29,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-26 14:17:29,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-01-26 14:17:29,165 INFO L87 Difference]: Start difference. First operand 9992 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:30,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:30,517 INFO L93 Difference]: Finished difference Result 12930 states and 30398 transitions. [2021-01-26 14:17:30,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-26 14:17:30,518 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:30,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:30,531 INFO L225 Difference]: With dead ends: 12930 [2021-01-26 14:17:30,531 INFO L226 Difference]: Without dead ends: 12132 [2021-01-26 14:17:30,533 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=598, Invalid=2264, Unknown=0, NotChecked=0, Total=2862 [2021-01-26 14:17:30,533 INFO L78 Accepts]: Start accepts. Automaton has 12132 states. Word has length 48 [2021-01-26 14:17:30,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:30,533 INFO L481 AbstractCegarLoop]: Abstraction has 12132 states. [2021-01-26 14:17:30,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:30,533 INFO L276 IsEmpty]: Start isEmpty. Operand 12132 states. [2021-01-26 14:17:30,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:30,548 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:30,548 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:30,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:30,754 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:30,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1376333259, now seen corresponding path program 5 times [2021-01-26 14:17:30,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:30,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856980265] [2021-01-26 14:17:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:30,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856980265] [2021-01-26 14:17:30,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487806500] [2021-01-26 14:17:30,918 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:31,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:17:31,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:31,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:31,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:31,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:31,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:31,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:31,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349845302] [2021-01-26 14:17:31,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:31,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:31,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:31,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:31,255 INFO L87 Difference]: Start difference. First operand 12132 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:31,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:31,539 INFO L93 Difference]: Finished difference Result 12324 states and 28703 transitions. [2021-01-26 14:17:31,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-26 14:17:31,540 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:31,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:31,559 INFO L225 Difference]: With dead ends: 12324 [2021-01-26 14:17:31,559 INFO L226 Difference]: Without dead ends: 12172 [2021-01-26 14:17:31,560 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-01-26 14:17:31,560 INFO L78 Accepts]: Start accepts. Automaton has 12172 states. Word has length 53 [2021-01-26 14:17:31,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:31,560 INFO L481 AbstractCegarLoop]: Abstraction has 12172 states. [2021-01-26 14:17:31,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:31,560 INFO L276 IsEmpty]: Start isEmpty. Operand 12172 states. [2021-01-26 14:17:31,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:31,575 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:31,575 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:31,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-26 14:17:31,790 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:31,790 INFO L82 PathProgramCache]: Analyzing trace with hash 372366749, now seen corresponding path program 6 times [2021-01-26 14:17:31,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:31,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601543037] [2021-01-26 14:17:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:31,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601543037] [2021-01-26 14:17:31,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533146838] [2021-01-26 14:17:31,940 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:32,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:17:32,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:32,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:32,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:32,187 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:32,231 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:32,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:32,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:32,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892280659] [2021-01-26 14:17:32,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:32,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:32,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:32,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:32,240 INFO L87 Difference]: Start difference. First operand 12172 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:32,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:32,982 INFO L93 Difference]: Finished difference Result 12956 states and 30351 transitions. [2021-01-26 14:17:32,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:17:32,983 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:32,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:32,997 INFO L225 Difference]: With dead ends: 12956 [2021-01-26 14:17:32,997 INFO L226 Difference]: Without dead ends: 12592 [2021-01-26 14:17:32,998 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2021-01-26 14:17:32,998 INFO L78 Accepts]: Start accepts. Automaton has 12592 states. Word has length 53 [2021-01-26 14:17:32,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:32,998 INFO L481 AbstractCegarLoop]: Abstraction has 12592 states. [2021-01-26 14:17:32,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 12592 states. [2021-01-26 14:17:33,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:33,009 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:33,009 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:33,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-26 14:17:33,216 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:33,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:33,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1523808235, now seen corresponding path program 8 times [2021-01-26 14:17:33,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:33,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100645010] [2021-01-26 14:17:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:33,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100645010] [2021-01-26 14:17:33,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215953739] [2021-01-26 14:17:33,374 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:33,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:33,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:33,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:33,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:33,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:33,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:33,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:17:33,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667225260] [2021-01-26 14:17:33,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:17:33,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:33,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:17:33,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:17:33,679 INFO L87 Difference]: Start difference. First operand 12592 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:33,833 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 9 [2021-01-26 14:17:34,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:34,321 INFO L93 Difference]: Finished difference Result 12904 states and 30053 transitions. [2021-01-26 14:17:34,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-26 14:17:34,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:34,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:34,337 INFO L225 Difference]: With dead ends: 12904 [2021-01-26 14:17:34,338 INFO L226 Difference]: Without dead ends: 12752 [2021-01-26 14:17:34,338 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:17:34,338 INFO L78 Accepts]: Start accepts. Automaton has 12752 states. Word has length 53 [2021-01-26 14:17:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:34,339 INFO L481 AbstractCegarLoop]: Abstraction has 12752 states. [2021-01-26 14:17:34,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:34,339 INFO L276 IsEmpty]: Start isEmpty. Operand 12752 states. [2021-01-26 14:17:34,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:34,352 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:34,352 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:34,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-26 14:17:34,563 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:34,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:34,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1287659999, now seen corresponding path program 9 times [2021-01-26 14:17:34,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:34,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405116542] [2021-01-26 14:17:34,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:34,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405116542] [2021-01-26 14:17:34,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821192599] [2021-01-26 14:17:34,743 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:34,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:17:34,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:34,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:34,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:35,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:35,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:35,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:17:35,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651543681] [2021-01-26 14:17:35,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:17:35,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:35,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:17:35,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:17:35,042 INFO L87 Difference]: Start difference. First operand 12752 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:35,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:35,660 INFO L93 Difference]: Finished difference Result 12944 states and 30133 transitions. [2021-01-26 14:17:35,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:17:35,660 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:35,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:35,675 INFO L225 Difference]: With dead ends: 12944 [2021-01-26 14:17:35,675 INFO L226 Difference]: Without dead ends: 12792 [2021-01-26 14:17:35,676 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2021-01-26 14:17:35,676 INFO L78 Accepts]: Start accepts. Automaton has 12792 states. Word has length 53 [2021-01-26 14:17:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:35,676 INFO L481 AbstractCegarLoop]: Abstraction has 12792 states. [2021-01-26 14:17:35,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 12792 states. [2021-01-26 14:17:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:35,687 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:35,687 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:35,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-26 14:17:35,902 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:35,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1715777465, now seen corresponding path program 10 times [2021-01-26 14:17:35,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:35,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714057508] [2021-01-26 14:17:35,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:36,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714057508] [2021-01-26 14:17:36,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893316722] [2021-01-26 14:17:36,077 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:36,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:17:36,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:36,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:17:36,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:36,305 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:36,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:36,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:36,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:36,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:36,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:17:36,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129542506] [2021-01-26 14:17:36,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:17:36,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:36,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:17:36,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:17:36,424 INFO L87 Difference]: Start difference. First operand 12792 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:37,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:37,804 INFO L93 Difference]: Finished difference Result 14302 states and 33456 transitions. [2021-01-26 14:17:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-26 14:17:37,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:37,822 INFO L225 Difference]: With dead ends: 14302 [2021-01-26 14:17:37,822 INFO L226 Difference]: Without dead ends: 13762 [2021-01-26 14:17:37,823 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=483, Invalid=1869, Unknown=0, NotChecked=0, Total=2352 [2021-01-26 14:17:37,823 INFO L78 Accepts]: Start accepts. Automaton has 13762 states. Word has length 53 [2021-01-26 14:17:37,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:37,823 INFO L481 AbstractCegarLoop]: Abstraction has 13762 states. [2021-01-26 14:17:37,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 13762 states. [2021-01-26 14:17:37,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:37,835 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:37,835 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:38,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-26 14:17:38,050 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:38,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:38,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1870495507, now seen corresponding path program 11 times [2021-01-26 14:17:38,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:38,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138552810] [2021-01-26 14:17:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:38,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138552810] [2021-01-26 14:17:38,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45829135] [2021-01-26 14:17:38,209 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:38,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:17:38,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:38,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:38,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:38,518 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:38,525 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:38,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:38,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:38,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:17:38,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908913331] [2021-01-26 14:17:38,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:17:38,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:38,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:17:38,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:17:38,581 INFO L87 Difference]: Start difference. First operand 13762 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:39,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:39,268 INFO L93 Difference]: Finished difference Result 14514 states and 33558 transitions. [2021-01-26 14:17:39,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-26 14:17:39,269 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:39,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:39,290 INFO L225 Difference]: With dead ends: 14514 [2021-01-26 14:17:39,290 INFO L226 Difference]: Without dead ends: 14362 [2021-01-26 14:17:39,294 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2021-01-26 14:17:39,294 INFO L78 Accepts]: Start accepts. Automaton has 14362 states. Word has length 53 [2021-01-26 14:17:39,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:39,294 INFO L481 AbstractCegarLoop]: Abstraction has 14362 states. [2021-01-26 14:17:39,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:39,295 INFO L276 IsEmpty]: Start isEmpty. Operand 14362 states. [2021-01-26 14:17:39,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:39,306 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:39,306 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:39,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:39,507 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:39,508 INFO L82 PathProgramCache]: Analyzing trace with hash 601156231, now seen corresponding path program 12 times [2021-01-26 14:17:39,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:39,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238791222] [2021-01-26 14:17:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:39,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238791222] [2021-01-26 14:17:39,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460699877] [2021-01-26 14:17:39,796 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:39,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:17:39,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:39,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:39,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:40,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:40,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:40,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:40,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:40,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:17:40,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757212822] [2021-01-26 14:17:40,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:17:40,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:40,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:17:40,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:17:40,229 INFO L87 Difference]: Start difference. First operand 14362 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:41,182 INFO L93 Difference]: Finished difference Result 14834 states and 34198 transitions. [2021-01-26 14:17:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-26 14:17:41,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:41,199 INFO L225 Difference]: With dead ends: 14834 [2021-01-26 14:17:41,199 INFO L226 Difference]: Without dead ends: 14682 [2021-01-26 14:17:41,200 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2021-01-26 14:17:41,200 INFO L78 Accepts]: Start accepts. Automaton has 14682 states. Word has length 53 [2021-01-26 14:17:41,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:41,201 INFO L481 AbstractCegarLoop]: Abstraction has 14682 states. [2021-01-26 14:17:41,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 14682 states. [2021-01-26 14:17:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:41,214 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:41,214 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:41,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:41,427 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:41,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:41,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1971730201, now seen corresponding path program 13 times [2021-01-26 14:17:41,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:41,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801676861] [2021-01-26 14:17:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:41,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801676861] [2021-01-26 14:17:41,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735700821] [2021-01-26 14:17:41,648 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:41,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:41,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:41,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:41,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:41,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:42,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:42,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:17:42,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976742801] [2021-01-26 14:17:42,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:17:42,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:42,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:17:42,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:17:42,041 INFO L87 Difference]: Start difference. First operand 14682 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:43,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:43,016 INFO L93 Difference]: Finished difference Result 15234 states and 34998 transitions. [2021-01-26 14:17:43,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-26 14:17:43,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:43,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:43,033 INFO L225 Difference]: With dead ends: 15234 [2021-01-26 14:17:43,033 INFO L226 Difference]: Without dead ends: 15082 [2021-01-26 14:17:43,034 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=358, Invalid=1202, Unknown=0, NotChecked=0, Total=1560 [2021-01-26 14:17:43,035 INFO L78 Accepts]: Start accepts. Automaton has 15082 states. Word has length 53 [2021-01-26 14:17:43,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:43,035 INFO L481 AbstractCegarLoop]: Abstraction has 15082 states. [2021-01-26 14:17:43,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:43,036 INFO L276 IsEmpty]: Start isEmpty. Operand 15082 states. [2021-01-26 14:17:43,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:43,046 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:43,046 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:43,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:43,250 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:43,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:43,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1215729429, now seen corresponding path program 14 times [2021-01-26 14:17:43,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:43,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124464724] [2021-01-26 14:17:43,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:43,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124464724] [2021-01-26 14:17:43,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516513670] [2021-01-26 14:17:43,424 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:43,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:43,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:43,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:43,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:43,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:43,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:43,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:43,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:17:43,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149067250] [2021-01-26 14:17:43,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:17:43,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:43,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:17:43,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:17:43,942 INFO L87 Difference]: Start difference. First operand 15082 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:45,851 INFO L93 Difference]: Finished difference Result 16912 states and 38961 transitions. [2021-01-26 14:17:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-26 14:17:45,851 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:45,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:45,869 INFO L225 Difference]: With dead ends: 16912 [2021-01-26 14:17:45,870 INFO L226 Difference]: Without dead ends: 16372 [2021-01-26 14:17:45,871 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=637, Invalid=2333, Unknown=0, NotChecked=0, Total=2970 [2021-01-26 14:17:45,871 INFO L78 Accepts]: Start accepts. Automaton has 16372 states. Word has length 53 [2021-01-26 14:17:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:45,871 INFO L481 AbstractCegarLoop]: Abstraction has 16372 states. [2021-01-26 14:17:45,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 16372 states. [2021-01-26 14:17:45,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:45,885 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:45,885 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:46,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-26 14:17:46,087 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:46,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:46,088 INFO L82 PathProgramCache]: Analyzing trace with hash 680245205, now seen corresponding path program 15 times [2021-01-26 14:17:46,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:46,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272205430] [2021-01-26 14:17:46,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:46,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272205430] [2021-01-26 14:17:46,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193515736] [2021-01-26 14:17:46,264 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:46,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:17:46,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:46,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:46,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:46,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:46,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:46,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:17:46,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629769500] [2021-01-26 14:17:46,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:17:46,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:46,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:17:46,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:17:46,586 INFO L87 Difference]: Start difference. First operand 16372 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:47,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:47,267 INFO L93 Difference]: Finished difference Result 16844 states and 38503 transitions. [2021-01-26 14:17:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-26 14:17:47,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:47,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:47,287 INFO L225 Difference]: With dead ends: 16844 [2021-01-26 14:17:47,287 INFO L226 Difference]: Without dead ends: 16692 [2021-01-26 14:17:47,288 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-01-26 14:17:47,288 INFO L78 Accepts]: Start accepts. Automaton has 16692 states. Word has length 53 [2021-01-26 14:17:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:47,288 INFO L481 AbstractCegarLoop]: Abstraction has 16692 states. [2021-01-26 14:17:47,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 16692 states. [2021-01-26 14:17:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:47,301 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:47,302 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:47,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:47,502 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:47,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:47,503 INFO L82 PathProgramCache]: Analyzing trace with hash 409323335, now seen corresponding path program 16 times [2021-01-26 14:17:47,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:47,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237215130] [2021-01-26 14:17:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:47,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237215130] [2021-01-26 14:17:47,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413462450] [2021-01-26 14:17:47,667 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:47,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:17:47,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:47,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:17:47,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:48,064 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:48,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:48,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:17:48,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631420777] [2021-01-26 14:17:48,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:17:48,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:48,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:17:48,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:17:48,111 INFO L87 Difference]: Start difference. First operand 16692 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:48,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:48,965 INFO L93 Difference]: Finished difference Result 17364 states and 39671 transitions. [2021-01-26 14:17:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-26 14:17:48,966 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:48,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:48,992 INFO L225 Difference]: With dead ends: 17364 [2021-01-26 14:17:48,992 INFO L226 Difference]: Without dead ends: 16972 [2021-01-26 14:17:48,993 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2021-01-26 14:17:48,993 INFO L78 Accepts]: Start accepts. Automaton has 16972 states. Word has length 53 [2021-01-26 14:17:48,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:48,993 INFO L481 AbstractCegarLoop]: Abstraction has 16972 states. [2021-01-26 14:17:48,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 16972 states. [2021-01-26 14:17:49,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:49,007 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:49,008 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:49,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-26 14:17:49,222 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:49,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:49,222 INFO L82 PathProgramCache]: Analyzing trace with hash -284076831, now seen corresponding path program 17 times [2021-01-26 14:17:49,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:49,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061517447] [2021-01-26 14:17:49,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:49,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061517447] [2021-01-26 14:17:49,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517191834] [2021-01-26 14:17:49,376 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:49,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:17:49,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:49,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:49,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:49,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:49,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:49,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:17:49,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550629888] [2021-01-26 14:17:49,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:17:49,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:49,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:17:49,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:17:49,676 INFO L87 Difference]: Start difference. First operand 16972 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:50,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:50,570 INFO L93 Difference]: Finished difference Result 17524 states and 39863 transitions. [2021-01-26 14:17:50,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-26 14:17:50,570 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:50,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:50,588 INFO L225 Difference]: With dead ends: 17524 [2021-01-26 14:17:50,588 INFO L226 Difference]: Without dead ends: 17372 [2021-01-26 14:17:50,588 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=337, Invalid=1145, Unknown=0, NotChecked=0, Total=1482 [2021-01-26 14:17:50,588 INFO L78 Accepts]: Start accepts. Automaton has 17372 states. Word has length 53 [2021-01-26 14:17:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:50,589 INFO L481 AbstractCegarLoop]: Abstraction has 17372 states. [2021-01-26 14:17:50,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 17372 states. [2021-01-26 14:17:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:50,599 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:50,599 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:50,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:50,800 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:50,801 INFO L82 PathProgramCache]: Analyzing trace with hash -554998701, now seen corresponding path program 18 times [2021-01-26 14:17:50,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:50,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671280161] [2021-01-26 14:17:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:50,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671280161] [2021-01-26 14:17:50,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052510049] [2021-01-26 14:17:50,969 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:51,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:17:51,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:51,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:51,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:51,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:51,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:51,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:17:51,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118585110] [2021-01-26 14:17:51,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:17:51,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:51,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:17:51,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:17:51,285 INFO L87 Difference]: Start difference. First operand 17372 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:51,714 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-01-26 14:17:52,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:52,447 INFO L93 Difference]: Finished difference Result 18284 states and 41511 transitions. [2021-01-26 14:17:52,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-26 14:17:52,448 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:52,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:52,466 INFO L225 Difference]: With dead ends: 18284 [2021-01-26 14:17:52,466 INFO L226 Difference]: Without dead ends: 17892 [2021-01-26 14:17:52,467 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=410, Invalid=1482, Unknown=0, NotChecked=0, Total=1892 [2021-01-26 14:17:52,467 INFO L78 Accepts]: Start accepts. Automaton has 17892 states. Word has length 53 [2021-01-26 14:17:52,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:52,468 INFO L481 AbstractCegarLoop]: Abstraction has 17892 states. [2021-01-26 14:17:52,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:52,468 INFO L276 IsEmpty]: Start isEmpty. Operand 17892 states. [2021-01-26 14:17:52,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:52,478 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:52,478 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:52,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-26 14:17:52,679 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:52,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2036829567, now seen corresponding path program 19 times [2021-01-26 14:17:52,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:52,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903620344] [2021-01-26 14:17:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:52,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903620344] [2021-01-26 14:17:52,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177907120] [2021-01-26 14:17:52,835 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:52,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:52,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:53,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:53,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:53,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:17:53,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375448950] [2021-01-26 14:17:53,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:17:53,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:53,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:17:53,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:17:53,151 INFO L87 Difference]: Start difference. First operand 17892 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:54,216 INFO L93 Difference]: Finished difference Result 18284 states and 41383 transitions. [2021-01-26 14:17:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-26 14:17:54,217 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:54,235 INFO L225 Difference]: With dead ends: 18284 [2021-01-26 14:17:54,236 INFO L226 Difference]: Without dead ends: 18132 [2021-01-26 14:17:54,236 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-01-26 14:17:54,236 INFO L78 Accepts]: Start accepts. Automaton has 18132 states. Word has length 53 [2021-01-26 14:17:54,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:54,237 INFO L481 AbstractCegarLoop]: Abstraction has 18132 states. [2021-01-26 14:17:54,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:54,237 INFO L276 IsEmpty]: Start isEmpty. Operand 18132 states. [2021-01-26 14:17:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:54,247 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:54,247 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:54,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:54,448 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:54,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1606714029, now seen corresponding path program 20 times [2021-01-26 14:17:54,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:54,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223896772] [2021-01-26 14:17:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:54,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223896772] [2021-01-26 14:17:54,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104869816] [2021-01-26 14:17:54,603 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:54,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:54,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:54,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:54,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:54,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:54,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:54,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:17:54,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245108378] [2021-01-26 14:17:54,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:17:54,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:54,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:17:54,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:17:54,899 INFO L87 Difference]: Start difference. First operand 18132 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:56,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:56,105 INFO L93 Difference]: Finished difference Result 18854 states and 42808 transitions. [2021-01-26 14:17:56,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-26 14:17:56,106 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:56,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:56,125 INFO L225 Difference]: With dead ends: 18854 [2021-01-26 14:17:56,125 INFO L226 Difference]: Without dead ends: 18702 [2021-01-26 14:17:56,126 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=410, Invalid=1312, Unknown=0, NotChecked=0, Total=1722 [2021-01-26 14:17:56,126 INFO L78 Accepts]: Start accepts. Automaton has 18702 states. Word has length 53 [2021-01-26 14:17:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:56,126 INFO L481 AbstractCegarLoop]: Abstraction has 18702 states. [2021-01-26 14:17:56,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 18702 states. [2021-01-26 14:17:56,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:56,140 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:56,140 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:56,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-26 14:17:56,341 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:56,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:56,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1932252495, now seen corresponding path program 21 times [2021-01-26 14:17:56,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:56,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663546890] [2021-01-26 14:17:56,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:56,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663546890] [2021-01-26 14:17:56,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656807976] [2021-01-26 14:17:56,524 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:56,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:17:56,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:56,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:56,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:56,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:56,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:56,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:56,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:17:56,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671796298] [2021-01-26 14:17:56,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:17:56,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:56,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:17:56,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:17:56,883 INFO L87 Difference]: Start difference. First operand 18702 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:58,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:58,877 INFO L93 Difference]: Finished difference Result 21900 states and 49763 transitions. [2021-01-26 14:17:58,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-26 14:17:58,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:58,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:58,903 INFO L225 Difference]: With dead ends: 21900 [2021-01-26 14:17:58,903 INFO L226 Difference]: Without dead ends: 21102 [2021-01-26 14:17:58,904 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=776, Invalid=3006, Unknown=0, NotChecked=0, Total=3782 [2021-01-26 14:17:58,904 INFO L78 Accepts]: Start accepts. Automaton has 21102 states. Word has length 53 [2021-01-26 14:17:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:58,905 INFO L481 AbstractCegarLoop]: Abstraction has 21102 states. [2021-01-26 14:17:58,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:58,905 INFO L276 IsEmpty]: Start isEmpty. Operand 21102 states. [2021-01-26 14:17:58,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:58,922 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:58,922 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:59,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-26 14:17:59,137 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:59,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:59,137 INFO L82 PathProgramCache]: Analyzing trace with hash 75989787, now seen corresponding path program 22 times [2021-01-26 14:17:59,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:59,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495486655] [2021-01-26 14:17:59,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:59,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495486655] [2021-01-26 14:17:59,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923435750] [2021-01-26 14:17:59,313 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:59,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:17:59,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:59,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:17:59,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:59,571 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:59,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:59,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:17:59,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354906845] [2021-01-26 14:17:59,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:17:59,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:59,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:17:59,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:17:59,753 INFO L87 Difference]: Start difference. First operand 21102 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:01,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:01,044 INFO L93 Difference]: Finished difference Result 21734 states and 48948 transitions. [2021-01-26 14:18:01,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-26 14:18:01,049 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:01,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:01,074 INFO L225 Difference]: With dead ends: 21734 [2021-01-26 14:18:01,074 INFO L226 Difference]: Without dead ends: 21582 [2021-01-26 14:18:01,075 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=533, Invalid=1723, Unknown=0, NotChecked=0, Total=2256 [2021-01-26 14:18:01,075 INFO L78 Accepts]: Start accepts. Automaton has 21582 states. Word has length 53 [2021-01-26 14:18:01,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:01,075 INFO L481 AbstractCegarLoop]: Abstraction has 21582 states. [2021-01-26 14:18:01,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 21582 states. [2021-01-26 14:18:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:01,088 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:01,088 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:01,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-26 14:18:01,289 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:01,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:01,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1798070651, now seen corresponding path program 23 times [2021-01-26 14:18:01,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:01,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999482249] [2021-01-26 14:18:01,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:01,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999482249] [2021-01-26 14:18:01,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758387511] [2021-01-26 14:18:01,435 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:01,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:18:01,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:01,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:01,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:01,701 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:01,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:01,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:18:01,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69943325] [2021-01-26 14:18:01,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:18:01,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:01,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:18:01,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:18:01,737 INFO L87 Difference]: Start difference. First operand 21582 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:03,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:03,104 INFO L93 Difference]: Finished difference Result 22644 states and 50863 transitions. [2021-01-26 14:18:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-26 14:18:03,105 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:03,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:03,134 INFO L225 Difference]: With dead ends: 22644 [2021-01-26 14:18:03,134 INFO L226 Difference]: Without dead ends: 22492 [2021-01-26 14:18:03,135 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=498, Invalid=1572, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:18:03,135 INFO L78 Accepts]: Start accepts. Automaton has 22492 states. Word has length 53 [2021-01-26 14:18:03,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:03,135 INFO L481 AbstractCegarLoop]: Abstraction has 22492 states. [2021-01-26 14:18:03,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:03,136 INFO L276 IsEmpty]: Start isEmpty. Operand 22492 states. [2021-01-26 14:18:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:03,149 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:03,149 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:03,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-26 14:18:03,350 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:03,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1740895873, now seen corresponding path program 24 times [2021-01-26 14:18:03,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:03,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219367892] [2021-01-26 14:18:03,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:03,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219367892] [2021-01-26 14:18:03,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13552374] [2021-01-26 14:18:03,511 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:03,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:18:03,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:03,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:03,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:03,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:03,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:03,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:03,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:18:03,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79432261] [2021-01-26 14:18:03,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:18:03,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:03,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:18:03,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:18:03,895 INFO L87 Difference]: Start difference. First operand 22492 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:04,387 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2021-01-26 14:18:06,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:06,470 INFO L93 Difference]: Finished difference Result 26370 states and 59558 transitions. [2021-01-26 14:18:06,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-26 14:18:06,470 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:06,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:06,499 INFO L225 Difference]: With dead ends: 26370 [2021-01-26 14:18:06,499 INFO L226 Difference]: Without dead ends: 25572 [2021-01-26 14:18:06,501 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=883, Invalid=3277, Unknown=0, NotChecked=0, Total=4160 [2021-01-26 14:18:06,501 INFO L78 Accepts]: Start accepts. Automaton has 25572 states. Word has length 53 [2021-01-26 14:18:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:06,501 INFO L481 AbstractCegarLoop]: Abstraction has 25572 states. [2021-01-26 14:18:06,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:06,501 INFO L276 IsEmpty]: Start isEmpty. Operand 25572 states. [2021-01-26 14:18:06,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:06,516 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:06,516 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:06,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:06,730 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:06,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:06,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1299793979, now seen corresponding path program 25 times [2021-01-26 14:18:06,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:06,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456332993] [2021-01-26 14:18:06,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:06,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456332993] [2021-01-26 14:18:06,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445073659] [2021-01-26 14:18:06,925 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:06,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:06,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:07,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:07,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:07,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:18:07,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796052104] [2021-01-26 14:18:07,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:18:07,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:07,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:18:07,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:18:07,205 INFO L87 Difference]: Start difference. First operand 25572 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:07,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:07,786 INFO L93 Difference]: Finished difference Result 26604 states and 59543 transitions. [2021-01-26 14:18:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-26 14:18:07,786 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:07,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:07,817 INFO L225 Difference]: With dead ends: 26604 [2021-01-26 14:18:07,817 INFO L226 Difference]: Without dead ends: 26452 [2021-01-26 14:18:07,818 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-01-26 14:18:07,818 INFO L78 Accepts]: Start accepts. Automaton has 26452 states. Word has length 53 [2021-01-26 14:18:07,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:07,818 INFO L481 AbstractCegarLoop]: Abstraction has 26452 states. [2021-01-26 14:18:07,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:07,818 INFO L276 IsEmpty]: Start isEmpty. Operand 26452 states. [2021-01-26 14:18:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:07,833 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:07,833 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:08,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-26 14:18:08,040 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:08,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:08,040 INFO L82 PathProgramCache]: Analyzing trace with hash 880108089, now seen corresponding path program 26 times [2021-01-26 14:18:08,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:08,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438312570] [2021-01-26 14:18:08,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:08,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438312570] [2021-01-26 14:18:08,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242820359] [2021-01-26 14:18:08,195 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:08,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:08,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:08,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:08,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:08,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:08,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:08,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:18:08,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786199659] [2021-01-26 14:18:08,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:18:08,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:08,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:18:08,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:18:08,485 INFO L87 Difference]: Start difference. First operand 26452 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:09,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:09,329 INFO L93 Difference]: Finished difference Result 27404 states and 61143 transitions. [2021-01-26 14:18:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-26 14:18:09,329 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:09,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:09,364 INFO L225 Difference]: With dead ends: 27404 [2021-01-26 14:18:09,364 INFO L226 Difference]: Without dead ends: 27252 [2021-01-26 14:18:09,364 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2021-01-26 14:18:09,364 INFO L78 Accepts]: Start accepts. Automaton has 27252 states. Word has length 53 [2021-01-26 14:18:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:09,364 INFO L481 AbstractCegarLoop]: Abstraction has 27252 states. [2021-01-26 14:18:09,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 27252 states. [2021-01-26 14:18:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:09,378 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:09,378 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:09,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-26 14:18:09,592 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:09,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:09,593 INFO L82 PathProgramCache]: Analyzing trace with hash -958412647, now seen corresponding path program 27 times [2021-01-26 14:18:09,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:09,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460733773] [2021-01-26 14:18:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:09,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460733773] [2021-01-26 14:18:09,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526999629] [2021-01-26 14:18:09,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:09,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-26 14:18:09,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:09,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:09,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:09,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:10,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:10,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:18:10,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086970473] [2021-01-26 14:18:10,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:18:10,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:10,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:18:10,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:18:10,006 INFO L87 Difference]: Start difference. First operand 27252 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:10,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:10,725 INFO L93 Difference]: Finished difference Result 27484 states and 61303 transitions. [2021-01-26 14:18:10,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:18:10,725 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:10,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:10,757 INFO L225 Difference]: With dead ends: 27484 [2021-01-26 14:18:10,757 INFO L226 Difference]: Without dead ends: 27332 [2021-01-26 14:18:10,757 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-01-26 14:18:10,757 INFO L78 Accepts]: Start accepts. Automaton has 27332 states. Word has length 53 [2021-01-26 14:18:10,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:10,758 INFO L481 AbstractCegarLoop]: Abstraction has 27332 states. [2021-01-26 14:18:10,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:10,758 INFO L276 IsEmpty]: Start isEmpty. Operand 27332 states. [2021-01-26 14:18:10,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:10,774 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:10,774 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:10,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:10,975 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:10,976 INFO L82 PathProgramCache]: Analyzing trace with hash -270011115, now seen corresponding path program 28 times [2021-01-26 14:18:10,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:10,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677555428] [2021-01-26 14:18:10,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:11,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677555428] [2021-01-26 14:18:11,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048239793] [2021-01-26 14:18:11,133 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:11,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:18:11,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:11,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:18:11,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:11,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:11,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:11,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:18:11,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153853092] [2021-01-26 14:18:11,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:18:11,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:11,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:18:11,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:18:11,401 INFO L87 Difference]: Start difference. First operand 27332 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:12,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:12,285 INFO L93 Difference]: Finished difference Result 27524 states and 61383 transitions. [2021-01-26 14:18:12,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-26 14:18:12,286 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:12,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:12,541 INFO L225 Difference]: With dead ends: 27524 [2021-01-26 14:18:12,541 INFO L226 Difference]: Without dead ends: 27372 [2021-01-26 14:18:12,541 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=1063, Unknown=0, NotChecked=0, Total=1406 [2021-01-26 14:18:12,541 INFO L78 Accepts]: Start accepts. Automaton has 27372 states. Word has length 53 [2021-01-26 14:18:12,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:12,542 INFO L481 AbstractCegarLoop]: Abstraction has 27372 states. [2021-01-26 14:18:12,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:12,542 INFO L276 IsEmpty]: Start isEmpty. Operand 27372 states. [2021-01-26 14:18:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:12,558 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:12,558 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:12,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-26 14:18:12,759 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:12,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:12,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1452069749, now seen corresponding path program 29 times [2021-01-26 14:18:12,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:12,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99274102] [2021-01-26 14:18:12,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:12,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99274102] [2021-01-26 14:18:12,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946803596] [2021-01-26 14:18:12,923 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:12,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:12,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:12,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:12,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:13,199 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:13,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:13,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:18:13,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432845511] [2021-01-26 14:18:13,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:18:13,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:13,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:18:13,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:18:13,238 INFO L87 Difference]: Start difference. First operand 27372 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:14,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:14,253 INFO L93 Difference]: Finished difference Result 27914 states and 62258 transitions. [2021-01-26 14:18:14,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-26 14:18:14,253 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:14,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:14,289 INFO L225 Difference]: With dead ends: 27914 [2021-01-26 14:18:14,289 INFO L226 Difference]: Without dead ends: 27762 [2021-01-26 14:18:14,289 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=360, Invalid=1122, Unknown=0, NotChecked=0, Total=1482 [2021-01-26 14:18:14,289 INFO L78 Accepts]: Start accepts. Automaton has 27762 states. Word has length 53 [2021-01-26 14:18:14,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:14,290 INFO L481 AbstractCegarLoop]: Abstraction has 27762 states. [2021-01-26 14:18:14,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand 27762 states. [2021-01-26 14:18:14,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:14,310 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:14,310 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:14,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:14,511 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:14,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2086896775, now seen corresponding path program 30 times [2021-01-26 14:18:14,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:14,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730038312] [2021-01-26 14:18:14,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:14,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730038312] [2021-01-26 14:18:14,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664518001] [2021-01-26 14:18:14,685 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:14,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-26 14:18:14,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:14,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:14,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:14,949 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:14,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:14,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:14,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:18:14,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148345935] [2021-01-26 14:18:14,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:18:14,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:14,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:18:14,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:18:14,988 INFO L87 Difference]: Start difference. First operand 27762 states. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:16,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:16,759 INFO L93 Difference]: Finished difference Result 29902 states and 66936 transitions. [2021-01-26 14:18:16,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-26 14:18:16,759 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:16,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:16,790 INFO L225 Difference]: With dead ends: 29902 [2021-01-26 14:18:16,790 INFO L226 Difference]: Without dead ends: 29362 [2021-01-26 14:18:16,790 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=681, Invalid=2399, Unknown=0, NotChecked=0, Total=3080 [2021-01-26 14:18:16,790 INFO L78 Accepts]: Start accepts. Automaton has 29362 states. Word has length 53 [2021-01-26 14:18:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:16,791 INFO L481 AbstractCegarLoop]: Abstraction has 29362 states. [2021-01-26 14:18:16,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:16,791 INFO L276 IsEmpty]: Start isEmpty. Operand 29362 states. [2021-01-26 14:18:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:16,812 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:16,812 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:17,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-26 14:18:17,013 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:17,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:17,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2038569245, now seen corresponding path program 3 times [2021-01-26 14:18:17,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:17,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323570299] [2021-01-26 14:18:17,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:17,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323570299] [2021-01-26 14:18:17,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527092323] [2021-01-26 14:18:17,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:17,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-26 14:18:17,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:17,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:17,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:17,532 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:17,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:17,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:17,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:17,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594095667] [2021-01-26 14:18:17,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:17,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:17,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:17,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:17,577 INFO L87 Difference]: Start difference. First operand 29362 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:18,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:18,116 INFO L93 Difference]: Finished difference Result 30594 states and 68382 transitions. [2021-01-26 14:18:18,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-26 14:18:18,117 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:18,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:18,147 INFO L225 Difference]: With dead ends: 30594 [2021-01-26 14:18:18,147 INFO L226 Difference]: Without dead ends: 30230 [2021-01-26 14:18:18,147 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-01-26 14:18:18,148 INFO L78 Accepts]: Start accepts. Automaton has 30230 states. Word has length 58 [2021-01-26 14:18:18,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:18,148 INFO L481 AbstractCegarLoop]: Abstraction has 30230 states. [2021-01-26 14:18:18,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:18,148 INFO L276 IsEmpty]: Start isEmpty. Operand 30230 states. [2021-01-26 14:18:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:18,168 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:18,168 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:18,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-26 14:18:18,369 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:18,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:18,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1808185776, now seen corresponding path program 7 times [2021-01-26 14:18:18,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:18,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247485815] [2021-01-26 14:18:18,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:18,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247485815] [2021-01-26 14:18:18,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769146454] [2021-01-26 14:18:18,568 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:18,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:18,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:18,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:18,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:18,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:18,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013061347] [2021-01-26 14:18:18,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:18,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:18,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:18,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:18,917 INFO L87 Difference]: Start difference. First operand 30230 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:19,400 INFO L93 Difference]: Finished difference Result 30422 states and 67844 transitions. [2021-01-26 14:18:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-26 14:18:19,401 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:19,434 INFO L225 Difference]: With dead ends: 30422 [2021-01-26 14:18:19,435 INFO L226 Difference]: Without dead ends: 30270 [2021-01-26 14:18:19,435 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-01-26 14:18:19,435 INFO L78 Accepts]: Start accepts. Automaton has 30270 states. Word has length 58 [2021-01-26 14:18:19,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:19,435 INFO L481 AbstractCegarLoop]: Abstraction has 30270 states. [2021-01-26 14:18:19,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:19,436 INFO L276 IsEmpty]: Start isEmpty. Operand 30270 states. [2021-01-26 14:18:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:19,642 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:19,642 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:19,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-26 14:18:19,842 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:19,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:19,843 INFO L82 PathProgramCache]: Analyzing trace with hash 804219266, now seen corresponding path program 8 times [2021-01-26 14:18:19,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:19,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23725596] [2021-01-26 14:18:19,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:20,096 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2021-01-26 14:18:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:20,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23725596] [2021-01-26 14:18:20,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979972085] [2021-01-26 14:18:20,145 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:20,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:20,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:20,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:20,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:20,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:20,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:20,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:20,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:20,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508037087] [2021-01-26 14:18:20,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:20,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:20,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:20,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:20,485 INFO L87 Difference]: Start difference. First operand 30270 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:21,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:21,478 INFO L93 Difference]: Finished difference Result 31134 states and 69652 transitions. [2021-01-26 14:18:21,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-26 14:18:21,479 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:21,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:21,572 INFO L225 Difference]: With dead ends: 31134 [2021-01-26 14:18:21,572 INFO L226 Difference]: Without dead ends: 30770 [2021-01-26 14:18:21,572 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=346, Invalid=1214, Unknown=0, NotChecked=0, Total=1560 [2021-01-26 14:18:21,572 INFO L78 Accepts]: Start accepts. Automaton has 30770 states. Word has length 58 [2021-01-26 14:18:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:21,573 INFO L481 AbstractCegarLoop]: Abstraction has 30770 states. [2021-01-26 14:18:21,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:21,573 INFO L276 IsEmpty]: Start isEmpty. Operand 30770 states. [2021-01-26 14:18:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:21,590 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:21,590 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:21,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-01-26 14:18:21,796 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:21,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:21,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1091955718, now seen corresponding path program 31 times [2021-01-26 14:18:21,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:21,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513476442] [2021-01-26 14:18:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:21,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513476442] [2021-01-26 14:18:21,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380600803] [2021-01-26 14:18:21,993 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 [2021-01-26 14:18:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:22,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:22,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:22,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:22,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:22,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:22,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172313472] [2021-01-26 14:18:22,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:22,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:22,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:22,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:22,343 INFO L87 Difference]: Start difference. First operand 30770 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:23,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:23,113 INFO L93 Difference]: Finished difference Result 31082 states and 69354 transitions. [2021-01-26 14:18:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-26 14:18:23,114 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:23,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:23,148 INFO L225 Difference]: With dead ends: 31082 [2021-01-26 14:18:23,148 INFO L226 Difference]: Without dead ends: 30930 [2021-01-26 14:18:23,149 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2021-01-26 14:18:23,149 INFO L78 Accepts]: Start accepts. Automaton has 30930 states. Word has length 58 [2021-01-26 14:18:23,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:23,149 INFO L481 AbstractCegarLoop]: Abstraction has 30930 states. [2021-01-26 14:18:23,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:23,149 INFO L276 IsEmpty]: Start isEmpty. Operand 30930 states. [2021-01-26 14:18:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:23,170 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:23,170 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:23,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:23,371 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:23,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:23,372 INFO L82 PathProgramCache]: Analyzing trace with hash -855807482, now seen corresponding path program 32 times [2021-01-26 14:18:23,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:23,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320393962] [2021-01-26 14:18:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:23,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320393962] [2021-01-26 14:18:23,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409918578] [2021-01-26 14:18:23,567 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 [2021-01-26 14:18:23,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:23,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:23,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:23,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:23,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:24,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:24,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:24,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144432948] [2021-01-26 14:18:24,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:24,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:24,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:24,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:24,025 INFO L87 Difference]: Start difference. First operand 30930 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:24,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:24,871 INFO L93 Difference]: Finished difference Result 31122 states and 69434 transitions. [2021-01-26 14:18:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-26 14:18:24,872 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:24,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:24,909 INFO L225 Difference]: With dead ends: 31122 [2021-01-26 14:18:24,910 INFO L226 Difference]: Without dead ends: 30970 [2021-01-26 14:18:24,910 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-01-26 14:18:24,910 INFO L78 Accepts]: Start accepts. Automaton has 30970 states. Word has length 58 [2021-01-26 14:18:24,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:24,910 INFO L481 AbstractCegarLoop]: Abstraction has 30970 states. [2021-01-26 14:18:24,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 30970 states. [2021-01-26 14:18:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:24,933 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:24,933 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:25,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-26 14:18:25,134 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:25,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1283924948, now seen corresponding path program 33 times [2021-01-26 14:18:25,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:25,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223800929] [2021-01-26 14:18:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:25,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223800929] [2021-01-26 14:18:25,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692051400] [2021-01-26 14:18:25,411 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 [2021-01-26 14:18:25,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-26 14:18:25,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:25,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:25,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:25,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:25,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:25,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:25,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:25,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722044738] [2021-01-26 14:18:25,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:25,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:25,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:25,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:25,742 INFO L87 Difference]: Start difference. First operand 30970 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:27,043 INFO L93 Difference]: Finished difference Result 32484 states and 72827 transitions. [2021-01-26 14:18:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-26 14:18:27,044 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:27,079 INFO L225 Difference]: With dead ends: 32484 [2021-01-26 14:18:27,079 INFO L226 Difference]: Without dead ends: 32120 [2021-01-26 14:18:27,079 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=471, Invalid=1691, Unknown=0, NotChecked=0, Total=2162 [2021-01-26 14:18:27,079 INFO L78 Accepts]: Start accepts. Automaton has 32120 states. Word has length 58 [2021-01-26 14:18:27,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:27,080 INFO L481 AbstractCegarLoop]: Abstraction has 32120 states. [2021-01-26 14:18:27,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:27,080 INFO L276 IsEmpty]: Start isEmpty. Operand 32120 states. [2021-01-26 14:18:27,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:27,100 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:27,100 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:27,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:27,301 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:27,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1992619272, now seen corresponding path program 34 times [2021-01-26 14:18:27,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:27,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158680810] [2021-01-26 14:18:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:27,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158680810] [2021-01-26 14:18:27,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936730599] [2021-01-26 14:18:27,502 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 [2021-01-26 14:18:27,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:18:27,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:27,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:18:27,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:27,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:27,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:27,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:27,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673903866] [2021-01-26 14:18:27,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:27,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:27,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:27,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:27,950 INFO L87 Difference]: Start difference. First operand 32120 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:31,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:31,048 INFO L93 Difference]: Finished difference Result 32512 states and 72689 transitions. [2021-01-26 14:18:31,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-26 14:18:31,049 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:31,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:31,084 INFO L225 Difference]: With dead ends: 32512 [2021-01-26 14:18:31,084 INFO L226 Difference]: Without dead ends: 32360 [2021-01-26 14:18:31,084 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2021-01-26 14:18:31,085 INFO L78 Accepts]: Start accepts. Automaton has 32360 states. Word has length 58 [2021-01-26 14:18:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:31,085 INFO L481 AbstractCegarLoop]: Abstraction has 32360 states. [2021-01-26 14:18:31,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:31,085 INFO L276 IsEmpty]: Start isEmpty. Operand 32360 states. [2021-01-26 14:18:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:31,105 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:31,105 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:31,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-26 14:18:31,306 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:31,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1033008748, now seen corresponding path program 35 times [2021-01-26 14:18:31,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:31,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933860055] [2021-01-26 14:18:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:31,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933860055] [2021-01-26 14:18:31,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001854513] [2021-01-26 14:18:31,522 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 [2021-01-26 14:18:31,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:18:31,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:31,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:31,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:32,559 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:32,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:32,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:32,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221965739] [2021-01-26 14:18:32,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:32,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:32,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:32,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=339, Unknown=1, NotChecked=0, Total=420 [2021-01-26 14:18:32,574 INFO L87 Difference]: Start difference. First operand 32360 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:36,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:36,089 INFO L93 Difference]: Finished difference Result 32632 states and 72929 transitions. [2021-01-26 14:18:36,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-26 14:18:36,090 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:36,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:36,126 INFO L225 Difference]: With dead ends: 32632 [2021-01-26 14:18:36,126 INFO L226 Difference]: Without dead ends: 32480 [2021-01-26 14:18:36,126 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=349, Invalid=1290, Unknown=1, NotChecked=0, Total=1640 [2021-01-26 14:18:36,126 INFO L78 Accepts]: Start accepts. Automaton has 32480 states. Word has length 58 [2021-01-26 14:18:36,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:36,127 INFO L481 AbstractCegarLoop]: Abstraction has 32480 states. [2021-01-26 14:18:36,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 32480 states. [2021-01-26 14:18:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:36,149 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:36,149 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:36,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-26 14:18:36,350 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:36,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:36,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1539877684, now seen corresponding path program 36 times [2021-01-26 14:18:36,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:36,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430626453] [2021-01-26 14:18:36,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:36,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430626453] [2021-01-26 14:18:36,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757555454] [2021-01-26 14:18:36,545 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 [2021-01-26 14:18:36,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:18:36,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:36,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:36,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:36,963 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:36,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:36,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:36,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881389493] [2021-01-26 14:18:36,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:36,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:36,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:36,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:36,982 INFO L87 Difference]: Start difference. First operand 32480 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:39,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:39,865 INFO L93 Difference]: Finished difference Result 32752 states and 73169 transitions. [2021-01-26 14:18:39,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-26 14:18:39,866 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:39,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:39,919 INFO L225 Difference]: With dead ends: 32752 [2021-01-26 14:18:39,919 INFO L226 Difference]: Without dead ends: 32600 [2021-01-26 14:18:39,920 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=424, Invalid=1468, Unknown=0, NotChecked=0, Total=1892 [2021-01-26 14:18:39,920 INFO L78 Accepts]: Start accepts. Automaton has 32600 states. Word has length 58 [2021-01-26 14:18:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:39,920 INFO L481 AbstractCegarLoop]: Abstraction has 32600 states. [2021-01-26 14:18:39,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:39,920 INFO L276 IsEmpty]: Start isEmpty. Operand 32600 states. [2021-01-26 14:18:39,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:39,948 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:39,949 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:40,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:40,150 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:40,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:40,150 INFO L82 PathProgramCache]: Analyzing trace with hash -783876912, now seen corresponding path program 37 times [2021-01-26 14:18:40,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:40,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342967184] [2021-01-26 14:18:40,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:40,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342967184] [2021-01-26 14:18:40,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914533935] [2021-01-26 14:18:40,360 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 [2021-01-26 14:18:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:40,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:40,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:40,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:40,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:40,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:40,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:40,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547358042] [2021-01-26 14:18:40,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:40,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:40,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:40,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:40,808 INFO L87 Difference]: Start difference. First operand 32600 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:42,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:42,841 INFO L93 Difference]: Finished difference Result 34584 states and 77597 transitions. [2021-01-26 14:18:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-26 14:18:42,842 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:42,881 INFO L225 Difference]: With dead ends: 34584 [2021-01-26 14:18:42,881 INFO L226 Difference]: Without dead ends: 34220 [2021-01-26 14:18:42,881 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=623, Invalid=2133, Unknown=0, NotChecked=0, Total=2756 [2021-01-26 14:18:42,882 INFO L78 Accepts]: Start accepts. Automaton has 34220 states. Word has length 58 [2021-01-26 14:18:42,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:42,882 INFO L481 AbstractCegarLoop]: Abstraction has 34220 states. [2021-01-26 14:18:42,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:42,882 INFO L276 IsEmpty]: Start isEmpty. Operand 34220 states. [2021-01-26 14:18:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:42,911 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:42,911 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:43,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-26 14:18:43,112 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:43,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:43,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1112097722, now seen corresponding path program 38 times [2021-01-26 14:18:43,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:43,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238294139] [2021-01-26 14:18:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:43,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238294139] [2021-01-26 14:18:43,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479283987] [2021-01-26 14:18:43,315 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 [2021-01-26 14:18:43,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:43,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:43,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:43,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:43,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:43,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:43,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:43,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:43,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:43,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664278674] [2021-01-26 14:18:43,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:43,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:43,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:43,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:43,729 INFO L87 Difference]: Start difference. First operand 34220 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:44,798 INFO L93 Difference]: Finished difference Result 34652 states and 77539 transitions. [2021-01-26 14:18:44,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-26 14:18:44,798 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:44,974 INFO L225 Difference]: With dead ends: 34652 [2021-01-26 14:18:44,974 INFO L226 Difference]: Without dead ends: 34500 [2021-01-26 14:18:44,974 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2021-01-26 14:18:44,974 INFO L78 Accepts]: Start accepts. Automaton has 34500 states. Word has length 58 [2021-01-26 14:18:44,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:44,974 INFO L481 AbstractCegarLoop]: Abstraction has 34500 states. [2021-01-26 14:18:44,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:44,975 INFO L276 IsEmpty]: Start isEmpty. Operand 34500 states. [2021-01-26 14:18:44,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:44,994 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:44,994 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:45,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-26 14:18:45,195 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:45,196 INFO L82 PathProgramCache]: Analyzing trace with hash 841175852, now seen corresponding path program 39 times [2021-01-26 14:18:45,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:45,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846327403] [2021-01-26 14:18:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:45,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846327403] [2021-01-26 14:18:45,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202648275] [2021-01-26 14:18:45,406 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 [2021-01-26 14:18:45,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:18:45,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:45,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:45,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:45,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:45,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:45,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:45,790 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:45,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:45,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:45,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:45,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:45,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:45,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:45,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781087052] [2021-01-26 14:18:45,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:45,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:45,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:45,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:45,879 INFO L87 Difference]: Start difference. First operand 34500 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:47,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:47,029 INFO L93 Difference]: Finished difference Result 34812 states and 77859 transitions. [2021-01-26 14:18:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-26 14:18:47,030 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:47,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:47,067 INFO L225 Difference]: With dead ends: 34812 [2021-01-26 14:18:47,067 INFO L226 Difference]: Without dead ends: 34660 [2021-01-26 14:18:47,068 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2021-01-26 14:18:47,068 INFO L78 Accepts]: Start accepts. Automaton has 34660 states. Word has length 58 [2021-01-26 14:18:47,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:47,068 INFO L481 AbstractCegarLoop]: Abstraction has 34660 states. [2021-01-26 14:18:47,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand 34660 states. [2021-01-26 14:18:47,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:47,091 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:47,091 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:47,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-26 14:18:47,292 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:47,292 INFO L82 PathProgramCache]: Analyzing trace with hash 147775686, now seen corresponding path program 40 times [2021-01-26 14:18:47,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:47,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599929566] [2021-01-26 14:18:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:47,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599929566] [2021-01-26 14:18:47,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792702960] [2021-01-26 14:18:47,618 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 [2021-01-26 14:18:47,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:18:47,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:47,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:18:47,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:47,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:47,999 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:48,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:48,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:48,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:48,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422267476] [2021-01-26 14:18:48,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:48,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:48,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:48,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:48,043 INFO L87 Difference]: Start difference. First operand 34660 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:49,339 INFO L93 Difference]: Finished difference Result 34852 states and 77939 transitions. [2021-01-26 14:18:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-26 14:18:49,340 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:49,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:49,381 INFO L225 Difference]: With dead ends: 34852 [2021-01-26 14:18:49,381 INFO L226 Difference]: Without dead ends: 34700 [2021-01-26 14:18:49,381 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=387, Invalid=1419, Unknown=0, NotChecked=0, Total=1806 [2021-01-26 14:18:49,381 INFO L78 Accepts]: Start accepts. Automaton has 34700 states. Word has length 58 [2021-01-26 14:18:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:49,381 INFO L481 AbstractCegarLoop]: Abstraction has 34700 states. [2021-01-26 14:18:49,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 34700 states. [2021-01-26 14:18:49,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:49,405 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:49,405 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:49,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:49,606 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:49,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:49,607 INFO L82 PathProgramCache]: Analyzing trace with hash -123146184, now seen corresponding path program 41 times [2021-01-26 14:18:49,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:49,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126736729] [2021-01-26 14:18:49,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:49,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126736729] [2021-01-26 14:18:49,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484670931] [2021-01-26 14:18:49,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:49,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:18:49,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:49,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:49,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:50,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:50,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:50,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:50,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:50,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:50,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:50,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:50,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:50,383 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-01-26 14:18:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:50,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:50,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:50,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865790899] [2021-01-26 14:18:50,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:50,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:50,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:50,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:50,397 INFO L87 Difference]: Start difference. First operand 34700 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:52,039 INFO L93 Difference]: Finished difference Result 34892 states and 78019 transitions. [2021-01-26 14:18:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-26 14:18:52,040 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:52,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:52,081 INFO L225 Difference]: With dead ends: 34892 [2021-01-26 14:18:52,082 INFO L226 Difference]: Without dead ends: 34740 [2021-01-26 14:18:52,082 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=440, Invalid=1540, Unknown=0, NotChecked=0, Total=1980 [2021-01-26 14:18:52,082 INFO L78 Accepts]: Start accepts. Automaton has 34740 states. Word has length 58 [2021-01-26 14:18:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:52,083 INFO L481 AbstractCegarLoop]: Abstraction has 34740 states. [2021-01-26 14:18:52,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 34740 states. [2021-01-26 14:18:52,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:52,113 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:52,113 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:52,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:52,314 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:52,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:52,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1604977050, now seen corresponding path program 42 times [2021-01-26 14:18:52,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:52,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158653080] [2021-01-26 14:18:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:52,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158653080] [2021-01-26 14:18:52,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684638397] [2021-01-26 14:18:52,516 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 [2021-01-26 14:18:52,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:18:52,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:52,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:52,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:53,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:53,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:53,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:53,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:53,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:53,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879396385] [2021-01-26 14:18:53,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:53,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:53,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:53,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:53,221 INFO L87 Difference]: Start difference. First operand 34740 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:54,208 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-01-26 14:18:55,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:55,034 INFO L93 Difference]: Finished difference Result 34932 states and 78099 transitions. [2021-01-26 14:18:55,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-26 14:18:55,035 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:55,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:55,074 INFO L225 Difference]: With dead ends: 34932 [2021-01-26 14:18:55,074 INFO L226 Difference]: Without dead ends: 34780 [2021-01-26 14:18:55,075 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=490, Invalid=1672, Unknown=0, NotChecked=0, Total=2162 [2021-01-26 14:18:55,075 INFO L78 Accepts]: Start accepts. Automaton has 34780 states. Word has length 58 [2021-01-26 14:18:55,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:55,075 INFO L481 AbstractCegarLoop]: Abstraction has 34780 states. [2021-01-26 14:18:55,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 34780 states. [2021-01-26 14:18:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:55,101 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:55,101 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:55,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:55,302 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:55,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:55,303 INFO L82 PathProgramCache]: Analyzing trace with hash 2038566546, now seen corresponding path program 43 times [2021-01-26 14:18:55,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:55,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792141956] [2021-01-26 14:18:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:55,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792141956] [2021-01-26 14:18:55,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622122815] [2021-01-26 14:18:55,490 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 [2021-01-26 14:18:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:55,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:55,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:55,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:55,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:55,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:55,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:55,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:55,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332539718] [2021-01-26 14:18:55,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:55,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:55,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:55,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:55,920 INFO L87 Difference]: Start difference. First operand 34780 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:57,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:57,597 INFO L93 Difference]: Finished difference Result 35012 states and 78259 transitions. [2021-01-26 14:18:57,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-26 14:18:57,598 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:57,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:57,635 INFO L225 Difference]: With dead ends: 35012 [2021-01-26 14:18:57,635 INFO L226 Difference]: Without dead ends: 34860 [2021-01-26 14:18:57,635 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=485, Invalid=1585, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:18:57,635 INFO L78 Accepts]: Start accepts. Automaton has 34860 states. Word has length 58 [2021-01-26 14:18:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:57,636 INFO L481 AbstractCegarLoop]: Abstraction has 34860 states. [2021-01-26 14:18:57,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:57,636 INFO L276 IsEmpty]: Start isEmpty. Operand 34860 states. [2021-01-26 14:18:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:57,657 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:57,657 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:57,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:57,857 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:57,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:57,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1500399978, now seen corresponding path program 44 times [2021-01-26 14:18:57,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:57,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319836666] [2021-01-26 14:18:57,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:58,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319836666] [2021-01-26 14:18:58,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080366254] [2021-01-26 14:18:58,061 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 [2021-01-26 14:18:58,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:58,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:58,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:58,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:58,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:58,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:58,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:58,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:58,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:58,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:58,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838309028] [2021-01-26 14:18:58,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:58,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:58,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:58,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:58,530 INFO L87 Difference]: Start difference. First operand 34860 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:19:00,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:00,695 INFO L93 Difference]: Finished difference Result 36934 states and 82772 transitions. [2021-01-26 14:19:00,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-26 14:19:00,696 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:19:00,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:00,734 INFO L225 Difference]: With dead ends: 36934 [2021-01-26 14:19:00,735 INFO L226 Difference]: Without dead ends: 36570 [2021-01-26 14:19:00,735 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=727, Invalid=2465, Unknown=0, NotChecked=0, Total=3192 [2021-01-26 14:19:00,736 INFO L78 Accepts]: Start accepts. Automaton has 36570 states. Word has length 58 [2021-01-26 14:19:00,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:00,736 INFO L481 AbstractCegarLoop]: Abstraction has 36570 states. [2021-01-26 14:19:00,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:19:00,736 INFO L276 IsEmpty]: Start isEmpty. Operand 36570 states. [2021-01-26 14:19:00,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:00,896 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:00,896 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:19:01,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-01-26 14:19:01,098 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:01,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:01,099 INFO L82 PathProgramCache]: Analyzing trace with hash 507842304, now seen corresponding path program 45 times [2021-01-26 14:19:01,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:01,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514853158] [2021-01-26 14:19:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:19:01,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514853158] [2021-01-26 14:19:01,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709868200] [2021-01-26 14:19:01,308 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 [2021-01-26 14:19:01,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:19:01,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:01,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:01,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:01,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:01,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:01,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:01,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:01,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:01,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:01,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:01,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:19:01,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:01,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:01,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157884972] [2021-01-26 14:19:01,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:01,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:01,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:01,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:01,815 INFO L87 Difference]: Start difference. First operand 36570 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:19:03,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:03,762 INFO L93 Difference]: Finished difference Result 36762 states and 82234 transitions. [2021-01-26 14:19:03,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-26 14:19:03,763 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:19:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:03,806 INFO L225 Difference]: With dead ends: 36762 [2021-01-26 14:19:03,806 INFO L226 Difference]: Without dead ends: 36610 [2021-01-26 14:19:03,807 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=616, Invalid=2140, Unknown=0, NotChecked=0, Total=2756 [2021-01-26 14:19:03,807 INFO L78 Accepts]: Start accepts. Automaton has 36610 states. Word has length 58 [2021-01-26 14:19:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:03,807 INFO L481 AbstractCegarLoop]: Abstraction has 36610 states. [2021-01-26 14:19:03,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:19:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 36610 states. [2021-01-26 14:19:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:03,835 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:03,835 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:19:04,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:19:04,036 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:04,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:04,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2065044128, now seen corresponding path program 46 times [2021-01-26 14:19:04,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:04,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727063231] [2021-01-26 14:19:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:19:04,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727063231] [2021-01-26 14:19:04,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305228553] [2021-01-26 14:19:04,233 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 [2021-01-26 14:19:04,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:19:04,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:04,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:19:04,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:04,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:04,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:04,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:04,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:04,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:04,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:04,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:04,760 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:19:04,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:04,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:04,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582394527] [2021-01-26 14:19:04,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:04,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:04,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:04,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:04,847 INFO L87 Difference]: Start difference. First operand 36610 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:19:06,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:06,720 INFO L93 Difference]: Finished difference Result 36802 states and 82314 transitions. [2021-01-26 14:19:06,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-26 14:19:06,721 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:19:06,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:06,761 INFO L225 Difference]: With dead ends: 36802 [2021-01-26 14:19:06,761 INFO L226 Difference]: Without dead ends: 36650 [2021-01-26 14:19:06,761 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=567, Invalid=1883, Unknown=0, NotChecked=0, Total=2450 [2021-01-26 14:19:06,762 INFO L78 Accepts]: Start accepts. Automaton has 36650 states. Word has length 58 [2021-01-26 14:19:06,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:06,762 INFO L481 AbstractCegarLoop]: Abstraction has 36650 states. [2021-01-26 14:19:06,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:19:06,762 INFO L276 IsEmpty]: Start isEmpty. Operand 36650 states. [2021-01-26 14:19:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:06,787 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:06,788 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:19:06,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-26 14:19:06,988 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:06,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:06,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1309043356, now seen corresponding path program 47 times [2021-01-26 14:19:06,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:06,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376764255] [2021-01-26 14:19:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:19:07,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376764255] [2021-01-26 14:19:07,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066129918] [2021-01-26 14:19:07,209 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 [2021-01-26 14:19:07,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:19:07,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:07,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:07,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:07,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:19:07,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:19:07,647 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:19:11,900 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2021-01-26 14:19:11,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:19:12,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:12,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:12,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234540758] [2021-01-26 14:19:12,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:12,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:12,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:12,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=322, Unknown=1, NotChecked=0, Total=420 [2021-01-26 14:19:12,124 INFO L87 Difference]: Start difference. First operand 36650 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:19:12,463 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 16 [2021-01-26 14:19:13,635 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 22 [2021-01-26 14:19:13,895 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 18 [2021-01-26 14:19:20,715 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-01-26 14:19:26,029 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-01-26 14:19:28,776 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 40 [2021-01-26 14:19:35,297 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-01-26 14:19:35,639 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 21 [2021-01-26 14:19:42,880 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-01-26 14:19:55,762 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 42 [2021-01-26 14:20:02,970 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-01-26 14:20:36,406 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-01-26 14:22:54,091 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2021-01-26 14:24:05,872 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-01-26 14:24:26,488 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 34 [2021-01-26 14:24:26,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:24:26,542 INFO L93 Difference]: Finished difference Result 40210 states and 90022 transitions. [2021-01-26 14:24:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-26 14:24:26,549 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:24:26,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:24:26,597 INFO L225 Difference]: With dead ends: 40210 [2021-01-26 14:24:26,597 INFO L226 Difference]: Without dead ends: 39670 [2021-01-26 14:24:26,598 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 102.1s TimeCoverageRelationStatistics Valid=873, Invalid=3136, Unknown=23, NotChecked=0, Total=4032 [2021-01-26 14:24:26,598 INFO L78 Accepts]: Start accepts. Automaton has 39670 states. Word has length 58 [2021-01-26 14:24:26,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:24:26,598 INFO L481 AbstractCegarLoop]: Abstraction has 39670 states. [2021-01-26 14:24:26,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 39670 states. [2021-01-26 14:24:26,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:24:26,625 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:24:26,625 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:24:26,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:24:26,827 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:24:26,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:24:26,827 INFO L82 PathProgramCache]: Analyzing trace with hash -597019592, now seen corresponding path program 48 times [2021-01-26 14:24:26,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:24:26,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444962980] [2021-01-26 14:24:26,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:24:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:24:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:27,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444962980] [2021-01-26 14:24:27,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845397660] [2021-01-26 14:24:27,395 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 [2021-01-26 14:24:27,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:24:27,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:24:27,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:24:27,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:24:28,378 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:28,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:24:28,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:24:28,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037533401] [2021-01-26 14:24:28,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:24:28,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:24:28,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:24:28,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:24:28,477 INFO L87 Difference]: Start difference. First operand 39670 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:31,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:24:31,421 INFO L93 Difference]: Finished difference Result 40342 states and 89964 transitions. [2021-01-26 14:24:31,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-26 14:24:31,430 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:24:31,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:24:31,478 INFO L225 Difference]: With dead ends: 40342 [2021-01-26 14:24:31,478 INFO L226 Difference]: Without dead ends: 40190 [2021-01-26 14:24:31,479 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-01-26 14:24:31,479 INFO L78 Accepts]: Start accepts. Automaton has 40190 states. Word has length 58 [2021-01-26 14:24:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:24:31,479 INFO L481 AbstractCegarLoop]: Abstraction has 40190 states. [2021-01-26 14:24:31,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 40190 states. [2021-01-26 14:24:31,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:24:31,506 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:24:31,506 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:24:31,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-26 14:24:31,710 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:24:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:24:31,712 INFO L82 PathProgramCache]: Analyzing trace with hash -867941462, now seen corresponding path program 49 times [2021-01-26 14:24:31,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:24:31,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377098750] [2021-01-26 14:24:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:24:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:24:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:32,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377098750] [2021-01-26 14:24:32,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388552893] [2021-01-26 14:24:32,406 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 [2021-01-26 14:24:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:24:32,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:24:32,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:24:33,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:33,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:24:33,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:24:33,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61862765] [2021-01-26 14:24:33,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:24:33,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:24:33,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:24:33,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:24:33,463 INFO L87 Difference]: Start difference. First operand 40190 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:37,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:24:37,245 INFO L93 Difference]: Finished difference Result 41422 states and 92252 transitions. [2021-01-26 14:24:37,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-26 14:24:37,250 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:24:37,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:24:37,298 INFO L225 Difference]: With dead ends: 41422 [2021-01-26 14:24:37,299 INFO L226 Difference]: Without dead ends: 41030 [2021-01-26 14:24:37,299 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:24:37,299 INFO L78 Accepts]: Start accepts. Automaton has 41030 states. Word has length 58 [2021-01-26 14:24:37,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:24:37,299 INFO L481 AbstractCegarLoop]: Abstraction has 41030 states. [2021-01-26 14:24:37,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 41030 states. [2021-01-26 14:24:37,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:24:37,325 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:24:37,325 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:24:37,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:24:37,526 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:24:37,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:24:37,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1582882476, now seen corresponding path program 50 times [2021-01-26 14:24:37,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:24:37,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610268561] [2021-01-26 14:24:37,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:24:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:24:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:38,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610268561] [2021-01-26 14:24:38,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501807146] [2021-01-26 14:24:38,237 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 [2021-01-26 14:24:38,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:24:38,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:24:38,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:24:38,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:24:39,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:39,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:24:39,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:24:39,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932635867] [2021-01-26 14:24:39,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:24:39,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:24:39,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:24:39,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:24:39,193 INFO L87 Difference]: Start difference. First operand 41030 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:42,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:24:42,876 INFO L93 Difference]: Finished difference Result 41702 states and 92684 transitions. [2021-01-26 14:24:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-26 14:24:42,882 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:24:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:24:42,931 INFO L225 Difference]: With dead ends: 41702 [2021-01-26 14:24:42,931 INFO L226 Difference]: Without dead ends: 41550 [2021-01-26 14:24:42,931 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:24:42,931 INFO L78 Accepts]: Start accepts. Automaton has 41550 states. Word has length 58 [2021-01-26 14:24:42,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:24:42,932 INFO L481 AbstractCegarLoop]: Abstraction has 41550 states. [2021-01-26 14:24:42,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:42,932 INFO L276 IsEmpty]: Start isEmpty. Operand 41550 states. [2021-01-26 14:24:42,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:24:42,956 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:24:42,956 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:24:43,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:24:43,156 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:24:43,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:24:43,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1311960606, now seen corresponding path program 51 times [2021-01-26 14:24:43,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:24:43,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492679603] [2021-01-26 14:24:43,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:24:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:24:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:43,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492679603] [2021-01-26 14:24:43,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048746801] [2021-01-26 14:24:43,747 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 [2021-01-26 14:24:43,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:24:43,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:24:43,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:24:43,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:24:44,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:44,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:24:44,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:24:44,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001439334] [2021-01-26 14:24:44,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:24:44,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:24:44,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:24:44,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:24:44,730 INFO L87 Difference]: Start difference. First operand 41550 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:24:48,813 INFO L93 Difference]: Finished difference Result 42022 states and 93324 transitions. [2021-01-26 14:24:48,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-26 14:24:48,818 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:24:48,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:24:48,868 INFO L225 Difference]: With dead ends: 42022 [2021-01-26 14:24:48,868 INFO L226 Difference]: Without dead ends: 41870 [2021-01-26 14:24:48,869 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2021-01-26 14:24:48,869 INFO L78 Accepts]: Start accepts. Automaton has 41870 states. Word has length 58 [2021-01-26 14:24:48,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:24:48,869 INFO L481 AbstractCegarLoop]: Abstraction has 41870 states. [2021-01-26 14:24:48,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:48,869 INFO L276 IsEmpty]: Start isEmpty. Operand 41870 states. [2021-01-26 14:24:48,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:24:48,896 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:24:48,896 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:24:49,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-01-26 14:24:49,097 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:24:49,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:24:49,098 INFO L82 PathProgramCache]: Analyzing trace with hash -255638260, now seen corresponding path program 52 times [2021-01-26 14:24:49,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:24:49,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347397456] [2021-01-26 14:24:49,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:24:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:24:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:49,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347397456] [2021-01-26 14:24:49,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031014240] [2021-01-26 14:24:49,664 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 [2021-01-26 14:24:49,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:24:49,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:24:49,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:24:49,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:24:50,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:50,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:24:50,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:24:50,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792995562] [2021-01-26 14:24:50,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:24:50,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:24:50,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:24:50,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:24:50,608 INFO L87 Difference]: Start difference. First operand 41870 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:51,700 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2021-01-26 14:24:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:24:55,200 INFO L93 Difference]: Finished difference Result 42542 states and 94364 transitions. [2021-01-26 14:24:55,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-26 14:24:55,206 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:24:55,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:24:55,279 INFO L225 Difference]: With dead ends: 42542 [2021-01-26 14:24:55,280 INFO L226 Difference]: Without dead ends: 42390 [2021-01-26 14:24:55,280 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2021-01-26 14:24:55,280 INFO L78 Accepts]: Start accepts. Automaton has 42390 states. Word has length 58 [2021-01-26 14:24:55,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:24:55,281 INFO L481 AbstractCegarLoop]: Abstraction has 42390 states. [2021-01-26 14:24:55,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:55,281 INFO L276 IsEmpty]: Start isEmpty. Operand 42390 states. [2021-01-26 14:24:55,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:24:55,321 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:24:55,321 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:24:55,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:24:55,537 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:24:55,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:24:55,537 INFO L82 PathProgramCache]: Analyzing trace with hash -526560130, now seen corresponding path program 53 times [2021-01-26 14:24:55,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:24:55,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054419019] [2021-01-26 14:24:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:24:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:24:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:56,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054419019] [2021-01-26 14:24:56,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554096191] [2021-01-26 14:24:56,409 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 [2021-01-26 14:24:56,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:24:56,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:24:56,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:24:56,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:24:57,281 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:57,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:24:57,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:24:57,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41610416] [2021-01-26 14:24:57,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:24:57,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:24:57,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:24:57,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:24:57,389 INFO L87 Difference]: Start difference. First operand 42390 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:02,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:25:02,135 INFO L93 Difference]: Finished difference Result 43022 states and 95452 transitions. [2021-01-26 14:25:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-26 14:25:02,140 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:25:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:25:02,190 INFO L225 Difference]: With dead ends: 43022 [2021-01-26 14:25:02,190 INFO L226 Difference]: Without dead ends: 42630 [2021-01-26 14:25:02,190 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=549, Invalid=2103, Unknown=0, NotChecked=0, Total=2652 [2021-01-26 14:25:02,190 INFO L78 Accepts]: Start accepts. Automaton has 42630 states. Word has length 58 [2021-01-26 14:25:02,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:25:02,190 INFO L481 AbstractCegarLoop]: Abstraction has 42630 states. [2021-01-26 14:25:02,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:02,191 INFO L276 IsEmpty]: Start isEmpty. Operand 42630 states. [2021-01-26 14:25:02,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:25:02,214 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:25:02,214 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:25:02,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:25:02,415 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:25:02,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:25:02,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1950977952, now seen corresponding path program 54 times [2021-01-26 14:25:02,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:25:02,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392545577] [2021-01-26 14:25:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:25:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:25:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:02,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392545577] [2021-01-26 14:25:02,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177893661] [2021-01-26 14:25:02,970 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 [2021-01-26 14:25:03,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:25:03,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:25:03,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:25:03,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:25:03,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:25:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:03,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:25:03,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:25:03,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843292783] [2021-01-26 14:25:03,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:25:03,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:25:03,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:25:03,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:25:03,934 INFO L87 Difference]: Start difference. First operand 42630 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:08,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:25:08,465 INFO L93 Difference]: Finished difference Result 42822 states and 94924 transitions. [2021-01-26 14:25:08,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-26 14:25:08,471 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:25:08,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:25:08,527 INFO L225 Difference]: With dead ends: 42822 [2021-01-26 14:25:08,527 INFO L226 Difference]: Without dead ends: 42670 [2021-01-26 14:25:08,527 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=604, Invalid=2048, Unknown=0, NotChecked=0, Total=2652 [2021-01-26 14:25:08,527 INFO L78 Accepts]: Start accepts. Automaton has 42670 states. Word has length 58 [2021-01-26 14:25:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:25:08,527 INFO L481 AbstractCegarLoop]: Abstraction has 42670 states. [2021-01-26 14:25:08,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 42670 states. [2021-01-26 14:25:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:25:08,556 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:25:08,556 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:25:08,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-01-26 14:25:08,758 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:25:08,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:25:08,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1692565644, now seen corresponding path program 55 times [2021-01-26 14:25:08,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:25:08,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817261989] [2021-01-26 14:25:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:25:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:25:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:09,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817261989] [2021-01-26 14:25:09,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122192475] [2021-01-26 14:25:09,327 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:25:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:25:09,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:25:09,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:25:10,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:25:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:10,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:25:10,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:25:10,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962068782] [2021-01-26 14:25:10,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:25:10,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:25:10,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:25:10,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:25:10,305 INFO L87 Difference]: Start difference. First operand 42670 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:12,997 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-01-26 14:25:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:25:15,126 INFO L93 Difference]: Finished difference Result 43472 states and 96509 transitions. [2021-01-26 14:25:15,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-26 14:25:15,132 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:25:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:25:15,185 INFO L225 Difference]: With dead ends: 43472 [2021-01-26 14:25:15,185 INFO L226 Difference]: Without dead ends: 43320 [2021-01-26 14:25:15,185 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-01-26 14:25:15,185 INFO L78 Accepts]: Start accepts. Automaton has 43320 states. Word has length 58 [2021-01-26 14:25:15,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:25:15,185 INFO L481 AbstractCegarLoop]: Abstraction has 43320 states. [2021-01-26 14:25:15,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:15,186 INFO L276 IsEmpty]: Start isEmpty. Operand 43320 states. [2021-01-26 14:25:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:25:15,217 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:25:15,217 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:25:15,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:25:15,418 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:25:15,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:25:15,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1846400880, now seen corresponding path program 56 times [2021-01-26 14:25:15,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:25:15,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302347986] [2021-01-26 14:25:15,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:25:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:25:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:16,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302347986] [2021-01-26 14:25:16,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431239802] [2021-01-26 14:25:16,102 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:25:16,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:25:16,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:25:16,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:25:16,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:25:16,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:25:17,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:25:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:17,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:25:17,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:25:17,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210180595] [2021-01-26 14:25:17,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:25:17,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:25:17,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:25:17,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:25:17,035 INFO L87 Difference]: Start difference. First operand 43320 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:20,136 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-01-26 14:25:23,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:25:23,119 INFO L93 Difference]: Finished difference Result 45884 states and 101907 transitions. [2021-01-26 14:25:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-26 14:25:23,125 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:25:23,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:25:23,189 INFO L225 Difference]: With dead ends: 45884 [2021-01-26 14:25:23,189 INFO L226 Difference]: Without dead ends: 45520 [2021-01-26 14:25:23,189 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=780, Invalid=2642, Unknown=0, NotChecked=0, Total=3422 [2021-01-26 14:25:23,189 INFO L78 Accepts]: Start accepts. Automaton has 45520 states. Word has length 58 [2021-01-26 14:25:23,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:25:23,190 INFO L481 AbstractCegarLoop]: Abstraction has 45520 states. [2021-01-26 14:25:23,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:23,190 INFO L276 IsEmpty]: Start isEmpty. Operand 45520 states. [2021-01-26 14:25:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:25:23,222 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:25:23,222 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:25:23,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-01-26 14:25:23,423 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:25:23,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:25:23,424 INFO L82 PathProgramCache]: Analyzing trace with hash 161841402, now seen corresponding path program 57 times [2021-01-26 14:25:23,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:25:23,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509032950] [2021-01-26 14:25:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:25:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:25:23,939 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2021-01-26 14:25:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:24,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509032950] [2021-01-26 14:25:24,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824609662] [2021-01-26 14:25:24,276 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:25:24,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:25:24,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:25:24,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:25:24,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:25:25,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:25:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:25,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:25:25,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:25:25,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411927259] [2021-01-26 14:25:25,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:25:25,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:25:25,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:25:25,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:25:25,104 INFO L87 Difference]: Start difference. First operand 45520 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:30,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:25:30,424 INFO L93 Difference]: Finished difference Result 46152 states and 102249 transitions. [2021-01-26 14:25:30,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-26 14:25:30,429 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:25:30,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:25:30,480 INFO L225 Difference]: With dead ends: 46152 [2021-01-26 14:25:30,480 INFO L226 Difference]: Without dead ends: 46000 [2021-01-26 14:25:30,480 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=724, Invalid=2468, Unknown=0, NotChecked=0, Total=3192 [2021-01-26 14:25:30,480 INFO L78 Accepts]: Start accepts. Automaton has 46000 states. Word has length 58 [2021-01-26 14:25:30,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:25:30,480 INFO L481 AbstractCegarLoop]: Abstraction has 46000 states. [2021-01-26 14:25:30,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:30,481 INFO L276 IsEmpty]: Start isEmpty. Operand 46000 states. [2021-01-26 14:25:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:25:30,507 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:25:30,507 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:25:30,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-26 14:25:30,708 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:25:30,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:25:30,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1883922266, now seen corresponding path program 58 times [2021-01-26 14:25:30,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:25:30,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285603863] [2021-01-26 14:25:30,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:25:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:25:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:31,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285603863] [2021-01-26 14:25:31,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076213473] [2021-01-26 14:25:31,260 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:25:31,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:25:31,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:25:31,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:25:31,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:25:32,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:25:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:32,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:25:32,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:25:32,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889398770] [2021-01-26 14:25:32,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:25:32,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:25:32,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:25:32,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:25:32,214 INFO L87 Difference]: Start difference. First operand 46000 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:35,887 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-01-26 14:25:38,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:25:38,799 INFO L93 Difference]: Finished difference Result 47420 states and 105167 transitions. [2021-01-26 14:25:38,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-26 14:25:38,804 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:25:38,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:25:38,862 INFO L225 Difference]: With dead ends: 47420 [2021-01-26 14:25:38,862 INFO L226 Difference]: Without dead ends: 46940 [2021-01-26 14:25:38,862 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=887, Invalid=3273, Unknown=0, NotChecked=0, Total=4160 [2021-01-26 14:25:38,862 INFO L78 Accepts]: Start accepts. Automaton has 46940 states. Word has length 58 [2021-01-26 14:25:38,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:25:38,863 INFO L481 AbstractCegarLoop]: Abstraction has 46940 states. [2021-01-26 14:25:38,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:38,863 INFO L276 IsEmpty]: Start isEmpty. Operand 46940 states. [2021-01-26 14:25:38,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:25:38,893 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:25:38,893 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:25:39,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-26 14:25:39,094 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:25:39,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:25:39,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1655044258, now seen corresponding path program 59 times [2021-01-26 14:25:39,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:25:39,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236858907] [2021-01-26 14:25:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:25:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:25:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:39,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236858907] [2021-01-26 14:25:39,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493193643] [2021-01-26 14:25:39,718 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 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 [2021-01-26 14:25:39,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:25:39,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:25:39,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:25:39,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:25:40,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:25:40,456 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:25:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:40,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:25:40,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:25:40,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020404584] [2021-01-26 14:25:40,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:25:40,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:25:40,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:25:40,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:25:40,467 INFO L87 Difference]: Start difference. First operand 46940 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:44,256 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2021-01-26 14:25:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:25:47,837 INFO L93 Difference]: Finished difference Result 51564 states and 114219 transitions. [2021-01-26 14:25:47,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-26 14:25:47,842 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:25:47,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:25:47,907 INFO L225 Difference]: With dead ends: 51564 [2021-01-26 14:25:47,907 INFO L226 Difference]: Without dead ends: 51030 [2021-01-26 14:25:47,907 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1097, Invalid=3873, Unknown=0, NotChecked=0, Total=4970 [2021-01-26 14:25:47,907 INFO L78 Accepts]: Start accepts. Automaton has 51030 states. Word has length 58 [2021-01-26 14:25:47,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:25:47,908 INFO L481 AbstractCegarLoop]: Abstraction has 51030 states. [2021-01-26 14:25:47,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:47,908 INFO L276 IsEmpty]: Start isEmpty. Operand 51030 states. [2021-01-26 14:25:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:25:47,939 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:25:47,939 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:25:48,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:25:48,140 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:25:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:25:48,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1791249794, now seen corresponding path program 60 times [2021-01-26 14:25:48,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:25:48,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137643109] [2021-01-26 14:25:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:25:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:25:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:48,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137643109] [2021-01-26 14:25:48,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040950160] [2021-01-26 14:25:48,701 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 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 [2021-01-26 14:25:48,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:25:48,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:25:48,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:25:48,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:25:49,630 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-01-26 14:25:49,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:25:49,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:25:49,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:25:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:49,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:25:49,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:25:49,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457953763] [2021-01-26 14:25:49,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:25:49,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:25:49,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:25:49,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:25:49,924 INFO L87 Difference]: Start difference. First operand 51030 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:51,300 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-01-26 14:25:53,258 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-01-26 14:25:54,676 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-01-26 14:25:55,183 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2021-01-26 14:25:56,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:25:56,485 INFO L93 Difference]: Finished difference Result 51942 states and 114684 transitions. [2021-01-26 14:25:56,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-26 14:25:56,492 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:25:56,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:25:56,572 INFO L225 Difference]: With dead ends: 51942 [2021-01-26 14:25:56,572 INFO L226 Difference]: Without dead ends: 51790 [2021-01-26 14:25:56,572 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=782, Invalid=2524, Unknown=0, NotChecked=0, Total=3306 [2021-01-26 14:25:56,572 INFO L78 Accepts]: Start accepts. Automaton has 51790 states. Word has length 58 [2021-01-26 14:25:56,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:25:56,573 INFO L481 AbstractCegarLoop]: Abstraction has 51790 states. [2021-01-26 14:25:56,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:56,573 INFO L276 IsEmpty]: Start isEmpty. Operand 51790 states. [2021-01-26 14:25:56,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:25:56,608 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:25:56,608 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:25:56,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:25:56,809 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:25:56,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:25:56,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1035249022, now seen corresponding path program 61 times [2021-01-26 14:25:56,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:25:56,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122153347] [2021-01-26 14:25:56,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:25:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:25:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:57,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122153347] [2021-01-26 14:25:57,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845217202] [2021-01-26 14:25:57,436 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 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 [2021-01-26 14:25:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:25:57,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:25:57,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:25:58,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:25:58,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:25:58,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:25:58,455 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-01-26 14:25:58,577 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-01-26 14:25:58,787 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-01-26 14:25:58,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:25:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:58,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:25:58,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:25:58,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30161885] [2021-01-26 14:25:58,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:25:58,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:25:58,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:25:58,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:25:58,853 INFO L87 Difference]: Start difference. First operand 51790 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:59,469 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 14 [2021-01-26 14:25:59,720 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 19 [2021-01-26 14:26:00,143 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2021-01-26 14:26:00,558 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2021-01-26 14:26:01,002 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2021-01-26 14:26:01,175 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 15 [2021-01-26 14:26:01,603 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-01-26 14:26:02,622 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-01-26 14:26:03,016 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-01-26 14:26:03,220 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 17 [2021-01-26 14:26:03,745 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-01-26 14:26:03,979 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-01-26 14:26:04,216 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 15 [2021-01-26 14:26:04,976 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-01-26 14:26:05,245 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-01-26 14:26:05,586 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 18 [2021-01-26 14:26:06,320 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 15 [2021-01-26 14:26:07,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:07,897 INFO L93 Difference]: Finished difference Result 53994 states and 119362 transitions. [2021-01-26 14:26:07,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-26 14:26:07,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:26:07,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:07,987 INFO L225 Difference]: With dead ends: 53994 [2021-01-26 14:26:07,988 INFO L226 Difference]: Without dead ends: 53630 [2021-01-26 14:26:07,988 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1048, Invalid=3374, Unknown=0, NotChecked=0, Total=4422 [2021-01-26 14:26:07,988 INFO L78 Accepts]: Start accepts. Automaton has 53630 states. Word has length 58 [2021-01-26 14:26:07,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:07,989 INFO L481 AbstractCegarLoop]: Abstraction has 53630 states. [2021-01-26 14:26:07,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:07,989 INFO L276 IsEmpty]: Start isEmpty. Operand 53630 states. [2021-01-26 14:26:08,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:26:08,171 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:08,171 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:26:08,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:08,371 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:08,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:08,373 INFO L82 PathProgramCache]: Analyzing trace with hash -313056756, now seen corresponding path program 62 times [2021-01-26 14:26:08,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:08,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073931200] [2021-01-26 14:26:08,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:09,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073931200] [2021-01-26 14:26:09,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441213077] [2021-01-26 14:26:09,056 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 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 [2021-01-26 14:26:09,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:26:09,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:09,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:26:09,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:09,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:09,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:09,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:09,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:26:09,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425157411] [2021-01-26 14:26:09,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:26:09,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:09,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:26:09,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:26:09,884 INFO L87 Difference]: Start difference. First operand 53630 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:10,599 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2021-01-26 14:26:10,811 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-01-26 14:26:11,356 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-01-26 14:26:11,715 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 14 [2021-01-26 14:26:13,419 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-01-26 14:26:13,614 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 15 [2021-01-26 14:26:14,086 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 12 [2021-01-26 14:26:14,749 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 15 [2021-01-26 14:26:15,286 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 16 [2021-01-26 14:26:15,704 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 15 [2021-01-26 14:26:17,034 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-01-26 14:26:17,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:17,293 INFO L93 Difference]: Finished difference Result 56134 states and 124212 transitions. [2021-01-26 14:26:17,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-26 14:26:17,300 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:26:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:17,370 INFO L225 Difference]: With dead ends: 56134 [2021-01-26 14:26:17,370 INFO L226 Difference]: Without dead ends: 55770 [2021-01-26 14:26:17,370 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=894, Invalid=2766, Unknown=0, NotChecked=0, Total=3660 [2021-01-26 14:26:17,370 INFO L78 Accepts]: Start accepts. Automaton has 55770 states. Word has length 58 [2021-01-26 14:26:17,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:17,371 INFO L481 AbstractCegarLoop]: Abstraction has 55770 states. [2021-01-26 14:26:17,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:17,371 INFO L276 IsEmpty]: Start isEmpty. Operand 55770 states. [2021-01-26 14:26:17,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:26:17,398 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:17,398 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:26:17,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:17,604 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:17,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1894537680, now seen corresponding path program 4 times [2021-01-26 14:26:17,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:17,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932827823] [2021-01-26 14:26:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:18,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932827823] [2021-01-26 14:26:18,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437424655] [2021-01-26 14:26:18,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-26 14:26:18,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:26:18,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:18,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:26:18,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:19,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:19,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:19,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:26:19,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797378763] [2021-01-26 14:26:19,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:26:19,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:19,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:26:19,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:26:19,203 INFO L87 Difference]: Start difference. First operand 55770 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:20,024 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-01-26 14:26:22,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:22,900 INFO L93 Difference]: Finished difference Result 56362 states and 124602 transitions. [2021-01-26 14:26:22,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-26 14:26:22,905 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:26:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:22,982 INFO L225 Difference]: With dead ends: 56362 [2021-01-26 14:26:22,983 INFO L226 Difference]: Without dead ends: 55970 [2021-01-26 14:26:22,983 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=409, Invalid=1397, Unknown=0, NotChecked=0, Total=1806 [2021-01-26 14:26:22,983 INFO L78 Accepts]: Start accepts. Automaton has 55970 states. Word has length 58 [2021-01-26 14:26:22,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:22,983 INFO L481 AbstractCegarLoop]: Abstraction has 55970 states. [2021-01-26 14:26:22,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:22,983 INFO L276 IsEmpty]: Start isEmpty. Operand 55970 states. [2021-01-26 14:26:23,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:26:23,017 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:23,018 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:26:23,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-01-26 14:26:23,218 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:23,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:23,220 INFO L82 PathProgramCache]: Analyzing trace with hash -872417628, now seen corresponding path program 5 times [2021-01-26 14:26:23,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:23,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166664271] [2021-01-26 14:26:23,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:24,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166664271] [2021-01-26 14:26:24,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142677807] [2021-01-26 14:26:24,076 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 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 [2021-01-26 14:26:24,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-26 14:26:24,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:24,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:26:24,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:25,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:25,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:25,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:26:25,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986885221] [2021-01-26 14:26:25,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:26:25,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:25,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:26:25,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:26:25,143 INFO L87 Difference]: Start difference. First operand 55970 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:26,195 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-01-26 14:26:28,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:28,979 INFO L93 Difference]: Finished difference Result 56842 states and 125562 transitions. [2021-01-26 14:26:28,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-26 14:26:28,984 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:26:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:29,056 INFO L225 Difference]: With dead ends: 56842 [2021-01-26 14:26:29,057 INFO L226 Difference]: Without dead ends: 56450 [2021-01-26 14:26:29,057 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=435, Invalid=1635, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:26:29,057 INFO L78 Accepts]: Start accepts. Automaton has 56450 states. Word has length 58 [2021-01-26 14:26:29,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:29,057 INFO L481 AbstractCegarLoop]: Abstraction has 56450 states. [2021-01-26 14:26:29,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 56450 states. [2021-01-26 14:26:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:26:29,092 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:29,092 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:26:29,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:29,293 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:29,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:29,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1434060580, now seen corresponding path program 6 times [2021-01-26 14:26:29,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:29,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028955986] [2021-01-26 14:26:29,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:29,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028955986] [2021-01-26 14:26:29,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663804981] [2021-01-26 14:26:29,936 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 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 [2021-01-26 14:26:30,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-26 14:26:30,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:30,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:26:30,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:31,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:31,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:31,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:26:31,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891166192] [2021-01-26 14:26:31,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:26:31,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:31,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:26:31,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:26:31,397 INFO L87 Difference]: Start difference. First operand 56450 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:32,723 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-01-26 14:26:33,602 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-01-26 14:26:34,356 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 13 [2021-01-26 14:26:36,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:36,504 INFO L93 Difference]: Finished difference Result 57122 states and 126122 transitions. [2021-01-26 14:26:36,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-26 14:26:36,509 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:26:36,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:36,609 INFO L225 Difference]: With dead ends: 57122 [2021-01-26 14:26:36,610 INFO L226 Difference]: Without dead ends: 56730 [2021-01-26 14:26:36,615 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=525, Invalid=2025, Unknown=0, NotChecked=0, Total=2550 [2021-01-26 14:26:36,615 INFO L78 Accepts]: Start accepts. Automaton has 56730 states. Word has length 58 [2021-01-26 14:26:36,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:36,617 INFO L481 AbstractCegarLoop]: Abstraction has 56730 states. [2021-01-26 14:26:36,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:36,617 INFO L276 IsEmpty]: Start isEmpty. Operand 56730 states. [2021-01-26 14:26:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:26:36,659 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:36,659 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:26:36,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:36,872 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:36,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:36,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1407546276, now seen corresponding path program 7 times [2021-01-26 14:26:36,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:36,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940922777] [2021-01-26 14:26:36,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:37,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940922777] [2021-01-26 14:26:37,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963146543] [2021-01-26 14:26:37,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-26 14:26:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:37,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:26:37,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:38,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:38,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:38,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:26:38,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802413297] [2021-01-26 14:26:38,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:26:38,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:38,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:26:38,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:26:38,984 INFO L87 Difference]: Start difference. First operand 56730 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:40,359 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-01-26 14:26:44,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:44,317 INFO L93 Difference]: Finished difference Result 57442 states and 126762 transitions. [2021-01-26 14:26:44,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-26 14:26:44,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:26:44,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:44,398 INFO L225 Difference]: With dead ends: 57442 [2021-01-26 14:26:44,398 INFO L226 Difference]: Without dead ends: 57050 [2021-01-26 14:26:44,399 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=669, Invalid=2523, Unknown=0, NotChecked=0, Total=3192 [2021-01-26 14:26:44,399 INFO L78 Accepts]: Start accepts. Automaton has 57050 states. Word has length 58 [2021-01-26 14:26:44,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:44,399 INFO L481 AbstractCegarLoop]: Abstraction has 57050 states. [2021-01-26 14:26:44,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:44,399 INFO L276 IsEmpty]: Start isEmpty. Operand 57050 states. [2021-01-26 14:26:44,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:26:44,608 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:44,608 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:26:44,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:44,809 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:44,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:44,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2120637404, now seen corresponding path program 8 times [2021-01-26 14:26:44,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:44,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076145336] [2021-01-26 14:26:44,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:45,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076145336] [2021-01-26 14:26:45,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364582992] [2021-01-26 14:26:45,529 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 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 [2021-01-26 14:26:45,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:26:45,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:45,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:26:45,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:46,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:46,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:46,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:26:46,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710573461] [2021-01-26 14:26:46,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:26:46,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:46,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:26:46,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:26:46,564 INFO L87 Difference]: Start difference. First operand 57050 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:48,051 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-01-26 14:26:52,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:52,686 INFO L93 Difference]: Finished difference Result 57850 states and 127642 transitions. [2021-01-26 14:26:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-26 14:26:52,692 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:26:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:52,800 INFO L225 Difference]: With dead ends: 57850 [2021-01-26 14:26:52,800 INFO L226 Difference]: Without dead ends: 57370 [2021-01-26 14:26:52,801 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=759, Invalid=2781, Unknown=0, NotChecked=0, Total=3540 [2021-01-26 14:26:52,801 INFO L78 Accepts]: Start accepts. Automaton has 57370 states. Word has length 58 [2021-01-26 14:26:52,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:52,801 INFO L481 AbstractCegarLoop]: Abstraction has 57370 states. [2021-01-26 14:26:52,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:52,802 INFO L276 IsEmpty]: Start isEmpty. Operand 57370 states. [2021-01-26 14:26:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:26:52,848 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:52,849 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:26:53,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:53,062 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:53,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:53,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1692519938, now seen corresponding path program 9 times [2021-01-26 14:26:53,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:53,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406803795] [2021-01-26 14:26:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:53,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406803795] [2021-01-26 14:26:53,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474576540] [2021-01-26 14:26:53,867 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 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 [2021-01-26 14:26:53,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-26 14:26:53,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:53,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:26:53,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:54,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:26:54,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:54,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:54,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:26:54,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941345922] [2021-01-26 14:26:54,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:26:54,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:54,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:26:54,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:26:54,790 INFO L87 Difference]: Start difference. First operand 57370 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:55,373 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 14 [2021-01-26 14:27:01,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:01,873 INFO L93 Difference]: Finished difference Result 59800 states and 132213 transitions. [2021-01-26 14:27:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-26 14:27:01,880 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:27:01,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:01,959 INFO L225 Difference]: With dead ends: 59800 [2021-01-26 14:27:01,959 INFO L226 Difference]: Without dead ends: 59160 [2021-01-26 14:27:01,959 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=942, Invalid=3218, Unknown=0, NotChecked=0, Total=4160 [2021-01-26 14:27:01,959 INFO L78 Accepts]: Start accepts. Automaton has 59160 states. Word has length 58 [2021-01-26 14:27:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:01,960 INFO L481 AbstractCegarLoop]: Abstraction has 59160 states. [2021-01-26 14:27:01,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:01,960 INFO L276 IsEmpty]: Start isEmpty. Operand 59160 states. [2021-01-26 14:27:01,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:01,994 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:01,994 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:27:02,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-01-26 14:27:02,195 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:02,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1400237682, now seen corresponding path program 63 times [2021-01-26 14:27:02,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:02,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799415093] [2021-01-26 14:27:02,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:02,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799415093] [2021-01-26 14:27:02,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253455106] [2021-01-26 14:27:02,846 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 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 [2021-01-26 14:27:03,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:27:03,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:03,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:03,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:03,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:04,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:04,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:04,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522018437] [2021-01-26 14:27:04,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:04,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:04,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:04,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:04,034 INFO L87 Difference]: Start difference. First operand 59160 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:06,236 INFO L93 Difference]: Finished difference Result 59752 states and 131729 transitions. [2021-01-26 14:27:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:27:06,243 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:27:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:06,333 INFO L225 Difference]: With dead ends: 59752 [2021-01-26 14:27:06,334 INFO L226 Difference]: Without dead ends: 59600 [2021-01-26 14:27:06,334 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=266, Invalid=790, Unknown=0, NotChecked=0, Total=1056 [2021-01-26 14:27:06,334 INFO L78 Accepts]: Start accepts. Automaton has 59600 states. Word has length 58 [2021-01-26 14:27:06,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:06,334 INFO L481 AbstractCegarLoop]: Abstraction has 59600 states. [2021-01-26 14:27:06,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 59600 states. [2021-01-26 14:27:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:06,369 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:06,369 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:27:06,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-01-26 14:27:06,569 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:06,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:06,570 INFO L82 PathProgramCache]: Analyzing trace with hash 828546426, now seen corresponding path program 64 times [2021-01-26 14:27:06,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:06,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652996421] [2021-01-26 14:27:06,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:07,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652996421] [2021-01-26 14:27:07,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502061512] [2021-01-26 14:27:07,266 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 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 [2021-01-26 14:27:07,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:27:07,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:07,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:07,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:08,464 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:08,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:08,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:08,872 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-01-26 14:27:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:08,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:08,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:08,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870072440] [2021-01-26 14:27:08,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:08,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:08,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:08,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:08,981 INFO L87 Difference]: Start difference. First operand 59600 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:12,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:12,321 INFO L93 Difference]: Finished difference Result 60152 states and 132529 transitions. [2021-01-26 14:27:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-26 14:27:12,330 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:27:12,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:12,448 INFO L225 Difference]: With dead ends: 60152 [2021-01-26 14:27:12,448 INFO L226 Difference]: Without dead ends: 60000 [2021-01-26 14:27:12,452 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2021-01-26 14:27:12,452 INFO L78 Accepts]: Start accepts. Automaton has 60000 states. Word has length 58 [2021-01-26 14:27:12,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:12,452 INFO L481 AbstractCegarLoop]: Abstraction has 60000 states. [2021-01-26 14:27:12,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:12,452 INFO L276 IsEmpty]: Start isEmpty. Operand 60000 states. [2021-01-26 14:27:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:12,504 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:12,504 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:27:12,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:12,718 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:12,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:12,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1273779074, now seen corresponding path program 65 times [2021-01-26 14:27:12,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:12,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746521482] [2021-01-26 14:27:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:13,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746521482] [2021-01-26 14:27:13,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817398725] [2021-01-26 14:27:13,597 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 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 [2021-01-26 14:27:13,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:27:13,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:13,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:13,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:14,314 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2021-01-26 14:27:14,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:14,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:14,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:14,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82270410] [2021-01-26 14:27:14,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:14,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:14,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:14,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:14,947 INFO L87 Difference]: Start difference. First operand 60000 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:15,508 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-01-26 14:27:18,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:18,036 INFO L93 Difference]: Finished difference Result 60352 states and 132929 transitions. [2021-01-26 14:27:18,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:27:18,042 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:27:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:18,123 INFO L225 Difference]: With dead ends: 60352 [2021-01-26 14:27:18,123 INFO L226 Difference]: Without dead ends: 60200 [2021-01-26 14:27:18,123 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-01-26 14:27:18,123 INFO L78 Accepts]: Start accepts. Automaton has 60200 states. Word has length 58 [2021-01-26 14:27:18,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:18,124 INFO L481 AbstractCegarLoop]: Abstraction has 60200 states. [2021-01-26 14:27:18,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:18,124 INFO L276 IsEmpty]: Start isEmpty. Operand 60200 states. [2021-01-26 14:27:18,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:18,151 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:18,151 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:27:18,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:18,352 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:18,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:18,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1845470330, now seen corresponding path program 66 times [2021-01-26 14:27:18,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:18,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836785856] [2021-01-26 14:27:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:18,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836785856] [2021-01-26 14:27:18,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292658285] [2021-01-26 14:27:18,957 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 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 [2021-01-26 14:27:19,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:27:19,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:19,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:19,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:19,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:19,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:19,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:20,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:20,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:20,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087578912] [2021-01-26 14:27:20,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:20,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:20,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:20,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:20,155 INFO L87 Difference]: Start difference. First operand 60200 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:20,611 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2021-01-26 14:27:23,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:23,765 INFO L93 Difference]: Finished difference Result 60472 states and 133169 transitions. [2021-01-26 14:27:23,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-26 14:27:23,772 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:27:23,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:23,879 INFO L225 Difference]: With dead ends: 60472 [2021-01-26 14:27:23,880 INFO L226 Difference]: Without dead ends: 60320 [2021-01-26 14:27:23,880 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2021-01-26 14:27:23,880 INFO L78 Accepts]: Start accepts. Automaton has 60320 states. Word has length 58 [2021-01-26 14:27:23,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:23,880 INFO L481 AbstractCegarLoop]: Abstraction has 60320 states. [2021-01-26 14:27:23,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:23,881 INFO L276 IsEmpty]: Start isEmpty. Operand 60320 states. [2021-01-26 14:27:23,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:23,926 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:23,926 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:27:24,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:24,139 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:24,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:24,140 INFO L82 PathProgramCache]: Analyzing trace with hash -972406242, now seen corresponding path program 67 times [2021-01-26 14:27:24,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:24,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985285939] [2021-01-26 14:27:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:24,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985285939] [2021-01-26 14:27:24,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305136392] [2021-01-26 14:27:24,820 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 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 [2021-01-26 14:27:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:25,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:25,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:25,608 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 11 [2021-01-26 14:27:26,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:26,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:26,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:26,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796804967] [2021-01-26 14:27:26,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:26,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:26,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:26,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:26,233 INFO L87 Difference]: Start difference. First operand 60320 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:26,895 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-01-26 14:27:27,058 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 14 [2021-01-26 14:27:29,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:29,292 INFO L93 Difference]: Finished difference Result 60512 states and 133249 transitions. [2021-01-26 14:27:29,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:27:29,300 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:27:29,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:29,409 INFO L225 Difference]: With dead ends: 60512 [2021-01-26 14:27:29,410 INFO L226 Difference]: Without dead ends: 60360 [2021-01-26 14:27:29,410 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=262, Invalid=928, Unknown=0, NotChecked=0, Total=1190 [2021-01-26 14:27:29,410 INFO L78 Accepts]: Start accepts. Automaton has 60360 states. Word has length 58 [2021-01-26 14:27:29,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:29,410 INFO L481 AbstractCegarLoop]: Abstraction has 60360 states. [2021-01-26 14:27:29,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:29,410 INFO L276 IsEmpty]: Start isEmpty. Operand 60360 states. [2021-01-26 14:27:29,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:29,452 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:29,452 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:27:29,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:29,665 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:29,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1544097498, now seen corresponding path program 68 times [2021-01-26 14:27:29,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:29,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365637349] [2021-01-26 14:27:29,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:30,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365637349] [2021-01-26 14:27:30,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167432883] [2021-01-26 14:27:30,390 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 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 [2021-01-26 14:27:30,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:27:30,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:30,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:30,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:31,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:31,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:31,407 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:31,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:31,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:31,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159796649] [2021-01-26 14:27:31,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:31,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:31,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:31,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:31,590 INFO L87 Difference]: Start difference. First operand 60360 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:32,211 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2021-01-26 14:27:32,376 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 12 [2021-01-26 14:27:33,233 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 15 [2021-01-26 14:27:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:35,164 INFO L93 Difference]: Finished difference Result 60632 states and 133489 transitions. [2021-01-26 14:27:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-26 14:27:35,170 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:27:35,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:35,251 INFO L225 Difference]: With dead ends: 60632 [2021-01-26 14:27:35,252 INFO L226 Difference]: Without dead ends: 60480 [2021-01-26 14:27:35,252 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-01-26 14:27:35,252 INFO L78 Accepts]: Start accepts. Automaton has 60480 states. Word has length 58 [2021-01-26 14:27:35,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:35,252 INFO L481 AbstractCegarLoop]: Abstraction has 60480 states. [2021-01-26 14:27:35,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:35,252 INFO L276 IsEmpty]: Start isEmpty. Operand 60480 states. [2021-01-26 14:27:35,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:35,288 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:35,288 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:27:35,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:35,490 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:35,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:35,490 INFO L82 PathProgramCache]: Analyzing trace with hash -89060534, now seen corresponding path program 69 times [2021-01-26 14:27:35,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:35,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255084421] [2021-01-26 14:27:35,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:36,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255084421] [2021-01-26 14:27:36,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083486928] [2021-01-26 14:27:36,055 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 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 [2021-01-26 14:27:36,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:27:36,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:36,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:36,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:37,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:37,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:37,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:37,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011209559] [2021-01-26 14:27:37,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:37,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:37,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:37,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:37,305 INFO L87 Difference]: Start difference. First operand 60480 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:40,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:40,441 INFO L93 Difference]: Finished difference Result 60672 states and 133569 transitions. [2021-01-26 14:27:40,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-26 14:27:40,448 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:27:40,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:40,567 INFO L225 Difference]: With dead ends: 60672 [2021-01-26 14:27:40,567 INFO L226 Difference]: Without dead ends: 60520 [2021-01-26 14:27:40,568 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2021-01-26 14:27:40,568 INFO L78 Accepts]: Start accepts. Automaton has 60520 states. Word has length 58 [2021-01-26 14:27:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:40,568 INFO L481 AbstractCegarLoop]: Abstraction has 60520 states. [2021-01-26 14:27:40,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 60520 states. [2021-01-26 14:27:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:40,798 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:40,798 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:27:41,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:41,012 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:41,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:41,012 INFO L82 PathProgramCache]: Analyzing trace with hash -660751790, now seen corresponding path program 70 times [2021-01-26 14:27:41,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:41,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594402170] [2021-01-26 14:27:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:41,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594402170] [2021-01-26 14:27:41,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183838062] [2021-01-26 14:27:41,844 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 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 [2021-01-26 14:27:41,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:27:41,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:41,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:27:41,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:42,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:42,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:42,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:43,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:43,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:43,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282005012] [2021-01-26 14:27:43,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:43,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:43,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:43,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:43,039 INFO L87 Difference]: Start difference. First operand 60520 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:43,816 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2021-01-26 14:27:44,386 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-01-26 14:27:44,811 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-01-26 14:27:45,355 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-01-26 14:27:45,713 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-01-26 14:27:47,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:47,391 INFO L93 Difference]: Finished difference Result 60792 states and 133809 transitions. [2021-01-26 14:27:47,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-26 14:27:47,399 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:27:47,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:47,485 INFO L225 Difference]: With dead ends: 60792 [2021-01-26 14:27:47,485 INFO L226 Difference]: Without dead ends: 60640 [2021-01-26 14:27:47,485 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=414, Invalid=1478, Unknown=0, NotChecked=0, Total=1892 [2021-01-26 14:27:47,485 INFO L78 Accepts]: Start accepts. Automaton has 60640 states. Word has length 58 [2021-01-26 14:27:47,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:47,486 INFO L481 AbstractCegarLoop]: Abstraction has 60640 states. [2021-01-26 14:27:47,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:47,486 INFO L276 IsEmpty]: Start isEmpty. Operand 60640 states. [2021-01-26 14:27:47,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:47,524 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:47,524 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:27:47,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:47,725 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:47,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1784400226, now seen corresponding path program 71 times [2021-01-26 14:27:47,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:47,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111199140] [2021-01-26 14:27:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:48,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111199140] [2021-01-26 14:27:48,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211320905] [2021-01-26 14:27:48,309 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 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 [2021-01-26 14:27:48,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:27:48,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:48,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:48,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:49,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:49,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:49,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:49,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243383296] [2021-01-26 14:27:49,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:49,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:49,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:49,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:49,296 INFO L87 Difference]: Start difference. First operand 60640 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:49,561 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 9 [2021-01-26 14:27:52,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:52,578 INFO L93 Difference]: Finished difference Result 60832 states and 133889 transitions. [2021-01-26 14:27:52,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-26 14:27:52,584 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:27:52,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:52,666 INFO L225 Difference]: With dead ends: 60832 [2021-01-26 14:27:52,666 INFO L226 Difference]: Without dead ends: 60680 [2021-01-26 14:27:52,667 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=347, Invalid=1213, Unknown=0, NotChecked=0, Total=1560 [2021-01-26 14:27:52,667 INFO L78 Accepts]: Start accepts. Automaton has 60680 states. Word has length 58 [2021-01-26 14:27:52,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:52,667 INFO L481 AbstractCegarLoop]: Abstraction has 60680 states. [2021-01-26 14:27:52,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:52,667 INFO L276 IsEmpty]: Start isEmpty. Operand 60680 states. [2021-01-26 14:27:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:52,703 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:52,703 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:27:52,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-01-26 14:27:52,904 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:52,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1639834552, now seen corresponding path program 72 times [2021-01-26 14:27:52,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:52,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978122980] [2021-01-26 14:27:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:53,601 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2021-01-26 14:27:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:53,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978122980] [2021-01-26 14:27:53,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714238206] [2021-01-26 14:27:53,679 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 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 [2021-01-26 14:27:53,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:27:53,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:53,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:53,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:54,604 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-01-26 14:27:54,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:54,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:54,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:54,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242451219] [2021-01-26 14:27:54,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:54,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:54,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:54,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:54,828 INFO L87 Difference]: Start difference. First operand 60680 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:55,201 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 9 [2021-01-26 14:27:56,013 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-01-26 14:27:56,199 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 14 [2021-01-26 14:27:57,044 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-01-26 14:27:59,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:59,740 INFO L93 Difference]: Finished difference Result 60912 states and 134049 transitions. [2021-01-26 14:27:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-26 14:27:59,747 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:27:59,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:59,867 INFO L225 Difference]: With dead ends: 60912 [2021-01-26 14:27:59,867 INFO L226 Difference]: Without dead ends: 60760 [2021-01-26 14:27:59,868 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=405, Invalid=1401, Unknown=0, NotChecked=0, Total=1806 [2021-01-26 14:27:59,868 INFO L78 Accepts]: Start accepts. Automaton has 60760 states. Word has length 58 [2021-01-26 14:27:59,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:59,869 INFO L481 AbstractCegarLoop]: Abstraction has 60760 states. [2021-01-26 14:27:59,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:59,869 INFO L276 IsEmpty]: Start isEmpty. Operand 60760 states. [2021-01-26 14:27:59,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:59,919 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:59,919 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:28:00,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:28:00,132 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:28:00,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:28:00,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1211717086, now seen corresponding path program 73 times [2021-01-26 14:28:00,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:28:00,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577818616] [2021-01-26 14:28:00,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:28:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:28:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:00,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577818616] [2021-01-26 14:28:00,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497360804] [2021-01-26 14:28:00,929 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 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 [2021-01-26 14:28:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:28:00,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:28:00,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:28:01,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:28:01,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:01,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:28:01,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:28:01,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479227808] [2021-01-26 14:28:01,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:28:01,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:28:01,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:28:01,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:28:01,946 INFO L87 Difference]: Start difference. First operand 60760 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:02,605 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-01-26 14:28:03,175 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-01-26 14:28:03,494 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-01-26 14:28:03,732 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-01-26 14:28:05,388 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-01-26 14:28:07,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:28:07,915 INFO L93 Difference]: Finished difference Result 62374 states and 137452 transitions. [2021-01-26 14:28:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-26 14:28:07,921 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:28:07,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:28:08,003 INFO L225 Difference]: With dead ends: 62374 [2021-01-26 14:28:08,003 INFO L226 Difference]: Without dead ends: 62010 [2021-01-26 14:28:08,004 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=649, Invalid=2213, Unknown=0, NotChecked=0, Total=2862 [2021-01-26 14:28:08,004 INFO L78 Accepts]: Start accepts. Automaton has 62010 states. Word has length 58 [2021-01-26 14:28:08,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:28:08,004 INFO L481 AbstractCegarLoop]: Abstraction has 62010 states. [2021-01-26 14:28:08,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:08,004 INFO L276 IsEmpty]: Start isEmpty. Operand 62010 states. [2021-01-26 14:28:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:28:08,040 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:28:08,040 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:28:08,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-01-26 14:28:08,241 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:28:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:28:08,241 INFO L82 PathProgramCache]: Analyzing trace with hash 384183672, now seen corresponding path program 74 times [2021-01-26 14:28:08,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:28:08,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871264651] [2021-01-26 14:28:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:28:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:28:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:08,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871264651] [2021-01-26 14:28:08,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267186336] [2021-01-26 14:28:08,852 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 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 [2021-01-26 14:28:08,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:28:08,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:28:08,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:28:08,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:28:09,805 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:09,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:09,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:09,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:28:09,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:28:09,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653387879] [2021-01-26 14:28:09,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:28:09,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:28:09,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:28:09,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:28:09,990 INFO L87 Difference]: Start difference. First operand 62010 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:10,594 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2021-01-26 14:28:10,764 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-01-26 14:28:10,931 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2021-01-26 14:28:11,883 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-01-26 14:28:12,061 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-01-26 14:28:12,865 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-01-26 14:28:13,248 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-01-26 14:28:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:28:15,226 INFO L93 Difference]: Finished difference Result 62282 states and 137074 transitions. [2021-01-26 14:28:15,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-26 14:28:15,233 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:28:15,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:28:15,354 INFO L225 Difference]: With dead ends: 62282 [2021-01-26 14:28:15,355 INFO L226 Difference]: Without dead ends: 62130 [2021-01-26 14:28:15,355 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2021-01-26 14:28:15,355 INFO L78 Accepts]: Start accepts. Automaton has 62130 states. Word has length 58 [2021-01-26 14:28:15,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:28:15,356 INFO L481 AbstractCegarLoop]: Abstraction has 62130 states. [2021-01-26 14:28:15,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:15,356 INFO L276 IsEmpty]: Start isEmpty. Operand 62130 states. [2021-01-26 14:28:15,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:28:15,608 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:28:15,608 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:28:15,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:28:15,809 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:28:15,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:28:15,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1097274800, now seen corresponding path program 75 times [2021-01-26 14:28:15,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:28:15,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028321181] [2021-01-26 14:28:15,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:28:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:28:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:16,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028321181] [2021-01-26 14:28:16,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041100506] [2021-01-26 14:28:16,577 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 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 [2021-01-26 14:28:16,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:28:16,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:28:16,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:28:16,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:28:17,552 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-01-26 14:28:17,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:17,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:17,659 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:17,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:28:17,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:28:17,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469701773] [2021-01-26 14:28:17,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:28:17,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:28:17,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:28:17,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:28:17,849 INFO L87 Difference]: Start difference. First operand 62130 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:18,944 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-01-26 14:28:19,304 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 14 [2021-01-26 14:28:19,533 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-01-26 14:28:20,862 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-01-26 14:28:21,354 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-01-26 14:28:21,594 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-01-26 14:28:23,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:28:23,872 INFO L93 Difference]: Finished difference Result 62402 states and 137314 transitions. [2021-01-26 14:28:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-26 14:28:23,880 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:28:23,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:28:23,982 INFO L225 Difference]: With dead ends: 62402 [2021-01-26 14:28:23,983 INFO L226 Difference]: Without dead ends: 62250 [2021-01-26 14:28:23,983 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=646, Invalid=2216, Unknown=0, NotChecked=0, Total=2862 [2021-01-26 14:28:23,983 INFO L78 Accepts]: Start accepts. Automaton has 62250 states. Word has length 58 [2021-01-26 14:28:23,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:28:23,983 INFO L481 AbstractCegarLoop]: Abstraction has 62250 states. [2021-01-26 14:28:23,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:23,984 INFO L276 IsEmpty]: Start isEmpty. Operand 62250 states. [2021-01-26 14:28:24,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:28:24,032 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:28:24,032 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:28:24,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-01-26 14:28:24,233 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:28:24,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:28:24,234 INFO L82 PathProgramCache]: Analyzing trace with hash 669157334, now seen corresponding path program 76 times [2021-01-26 14:28:24,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:28:24,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196012160] [2021-01-26 14:28:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:28:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:28:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:25,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196012160] [2021-01-26 14:28:25,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381130935] [2021-01-26 14:28:25,081 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 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 [2021-01-26 14:28:25,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:28:25,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:28:25,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:28:25,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:28:25,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:28:26,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:26,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:28:26,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:28:26,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500434775] [2021-01-26 14:28:26,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:28:26,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:28:26,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:28:26,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:28:26,168 INFO L87 Difference]: Start difference. First operand 62250 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:26,840 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-01-26 14:28:27,332 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-01-26 14:28:27,832 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-01-26 14:28:29,119 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-01-26 14:28:29,446 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-01-26 14:28:31,055 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-01-26 14:28:33,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:28:33,759 INFO L93 Difference]: Finished difference Result 65094 states and 143652 transitions. [2021-01-26 14:28:33,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-26 14:28:33,766 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:28:33,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:28:33,881 INFO L225 Difference]: With dead ends: 65094 [2021-01-26 14:28:33,882 INFO L226 Difference]: Without dead ends: 64730 [2021-01-26 14:28:33,882 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=929, Invalid=3361, Unknown=0, NotChecked=0, Total=4290 [2021-01-26 14:28:33,882 INFO L78 Accepts]: Start accepts. Automaton has 64730 states. Word has length 58 [2021-01-26 14:28:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:28:33,883 INFO L481 AbstractCegarLoop]: Abstraction has 64730 states. [2021-01-26 14:28:33,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:33,883 INFO L276 IsEmpty]: Start isEmpty. Operand 64730 states. [2021-01-26 14:28:33,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:28:33,929 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:28:33,929 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:28:34,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-01-26 14:28:34,144 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:28:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:28:34,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1142254788, now seen corresponding path program 77 times [2021-01-26 14:28:34,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:28:34,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660054940] [2021-01-26 14:28:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:28:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:28:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:34,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660054940] [2021-01-26 14:28:34,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971258749] [2021-01-26 14:28:34,785 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 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 [2021-01-26 14:28:34,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:28:34,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:28:34,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:28:34,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:28:35,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:35,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:28:35,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:28:35,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655377869] [2021-01-26 14:28:35,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:28:35,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:28:35,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:28:35,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:28:35,887 INFO L87 Difference]: Start difference. First operand 64730 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:37,530 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 15 [2021-01-26 14:28:38,581 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2021-01-26 14:28:39,315 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-01-26 14:28:40,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:28:40,915 INFO L93 Difference]: Finished difference Result 65792 states and 144949 transitions. [2021-01-26 14:28:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-26 14:28:40,921 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:28:40,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:28:41,027 INFO L225 Difference]: With dead ends: 65792 [2021-01-26 14:28:41,028 INFO L226 Difference]: Without dead ends: 65640 [2021-01-26 14:28:41,028 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2021-01-26 14:28:41,028 INFO L78 Accepts]: Start accepts. Automaton has 65640 states. Word has length 58 [2021-01-26 14:28:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:28:41,028 INFO L481 AbstractCegarLoop]: Abstraction has 65640 states. [2021-01-26 14:28:41,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:41,029 INFO L276 IsEmpty]: Start isEmpty. Operand 65640 states. [2021-01-26 14:28:41,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:28:41,074 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:28:41,074 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:28:41,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-01-26 14:28:41,289 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:28:41,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:28:41,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1898255560, now seen corresponding path program 78 times [2021-01-26 14:28:41,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:28:41,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989985950] [2021-01-26 14:28:41,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:28:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:28:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:42,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989985950] [2021-01-26 14:28:42,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268705379] [2021-01-26 14:28:42,047 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 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 [2021-01-26 14:28:42,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:28:42,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:28:42,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:28:42,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:28:42,848 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:28:43,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:43,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:28:43,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:28:43,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855985307] [2021-01-26 14:28:43,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:28:43,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:28:43,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:28:43,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:28:43,027 INFO L87 Difference]: Start difference. First operand 65640 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:43,606 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-01-26 14:28:44,640 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2021-01-26 14:28:44,822 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 15 [2021-01-26 14:28:45,367 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-01-26 14:28:45,880 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-01-26 14:28:46,228 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-01-26 14:28:46,410 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 19 [2021-01-26 14:28:49,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:28:49,861 INFO L93 Difference]: Finished difference Result 68284 states and 150887 transitions. [2021-01-26 14:28:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-26 14:28:49,867 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:28:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:28:49,993 INFO L225 Difference]: With dead ends: 68284 [2021-01-26 14:28:49,993 INFO L226 Difference]: Without dead ends: 67920 [2021-01-26 14:28:49,994 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=801, Invalid=2621, Unknown=0, NotChecked=0, Total=3422 [2021-01-26 14:28:49,994 INFO L78 Accepts]: Start accepts. Automaton has 67920 states. Word has length 58 [2021-01-26 14:28:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:28:49,994 INFO L481 AbstractCegarLoop]: Abstraction has 67920 states. [2021-01-26 14:28:49,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 67920 states. [2021-01-26 14:28:50,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:28:50,245 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:28:50,246 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:28:50,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:28:50,446 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:28:50,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:28:50,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1735535381, now seen corresponding path program 9 times [2021-01-26 14:28:50,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:28:50,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954128439] [2021-01-26 14:28:50,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:28:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:28:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:51,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954128439] [2021-01-26 14:28:51,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437308558] [2021-01-26 14:28:51,328 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 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 [2021-01-26 14:28:51,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-26 14:28:51,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:28:51,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:28:51,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:28:52,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:52,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:28:52,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:28:52,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962473881] [2021-01-26 14:28:52,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:28:52,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:28:52,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:28:52,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:28:52,619 INFO L87 Difference]: Start difference. First operand 67920 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:54,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:28:54,657 INFO L93 Difference]: Finished difference Result 68112 states and 150349 transitions. [2021-01-26 14:28:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-26 14:28:54,664 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:28:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:28:54,786 INFO L225 Difference]: With dead ends: 68112 [2021-01-26 14:28:54,786 INFO L226 Difference]: Without dead ends: 67960 [2021-01-26 14:28:54,786 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:28:54,786 INFO L78 Accepts]: Start accepts. Automaton has 67960 states. Word has length 63 [2021-01-26 14:28:54,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:28:54,787 INFO L481 AbstractCegarLoop]: Abstraction has 67960 states. [2021-01-26 14:28:54,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 67960 states. [2021-01-26 14:28:54,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:28:54,861 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:28:54,861 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:28:55,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-01-26 14:28:55,075 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:28:55,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:28:55,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1555465405, now seen corresponding path program 10 times [2021-01-26 14:28:55,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:28:55,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421587189] [2021-01-26 14:28:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:28:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:28:55,714 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 6 [2021-01-26 14:28:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:55,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421587189] [2021-01-26 14:28:55,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173589773] [2021-01-26 14:28:55,981 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 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 [2021-01-26 14:28:56,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:28:56,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:28:56,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:28:56,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:28:57,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:28:57,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:57,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:28:57,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:28:57,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335367917] [2021-01-26 14:28:57,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:28:57,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:28:57,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:28:57,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:28:57,471 INFO L87 Difference]: Start difference. First operand 67960 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:58,090 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 12 [2021-01-26 14:29:01,249 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2021-01-26 14:29:02,091 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-01-26 14:29:02,524 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-01-26 14:29:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:29:03,004 INFO L93 Difference]: Finished difference Result 69080 states and 152797 transitions. [2021-01-26 14:29:03,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-26 14:29:03,011 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:29:03,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:29:03,145 INFO L225 Difference]: With dead ends: 69080 [2021-01-26 14:29:03,145 INFO L226 Difference]: Without dead ends: 68540 [2021-01-26 14:29:03,146 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=482, Invalid=1870, Unknown=0, NotChecked=0, Total=2352 [2021-01-26 14:29:03,146 INFO L78 Accepts]: Start accepts. Automaton has 68540 states. Word has length 63 [2021-01-26 14:29:03,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:29:03,146 INFO L481 AbstractCegarLoop]: Abstraction has 68540 states. [2021-01-26 14:29:03,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:29:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 68540 states. [2021-01-26 14:29:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:29:03,222 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:29:03,222 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:29:03,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:29:03,436 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:29:03,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:29:03,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1241373133, now seen corresponding path program 79 times [2021-01-26 14:29:03,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:29:03,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286547194] [2021-01-26 14:29:03,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:29:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:29:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:29:04,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286547194] [2021-01-26 14:29:04,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401485668] [2021-01-26 14:29:04,251 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 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 [2021-01-26 14:29:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:29:04,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:29:04,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:29:05,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:29:05,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:29:05,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:29:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:29:05,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:29:05,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:29:05,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772188463] [2021-01-26 14:29:05,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:29:05,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:29:05,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:29:05,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:29:05,949 INFO L87 Difference]: Start difference. First operand 68540 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:29:06,542 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 12 [2021-01-26 14:29:06,813 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-01-26 14:29:07,309 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-01-26 14:29:07,708 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-01-26 14:29:08,695 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-01-26 14:29:09,108 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-01-26 14:29:10,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:29:10,156 INFO L93 Difference]: Finished difference Result 68852 states and 152019 transitions. [2021-01-26 14:29:10,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-26 14:29:10,163 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:29:10,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:29:10,256 INFO L225 Difference]: With dead ends: 68852 [2021-01-26 14:29:10,256 INFO L226 Difference]: Without dead ends: 68700 [2021-01-26 14:29:10,256 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=371, Invalid=1269, Unknown=0, NotChecked=0, Total=1640 [2021-01-26 14:29:10,256 INFO L78 Accepts]: Start accepts. Automaton has 68700 states. Word has length 63 [2021-01-26 14:29:10,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:29:10,256 INFO L481 AbstractCegarLoop]: Abstraction has 68700 states. [2021-01-26 14:29:10,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:29:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 68700 states. [2021-01-26 14:29:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:29:10,308 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:29:10,308 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:29:10,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-01-26 14:29:10,509 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:29:10,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:29:10,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1784254887, now seen corresponding path program 80 times [2021-01-26 14:29:10,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:29:10,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739508115] [2021-01-26 14:29:10,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:29:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:29:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:29:11,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739508115] [2021-01-26 14:29:11,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838140510] [2021-01-26 14:29:11,290 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 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 [2021-01-26 14:29:11,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:29:11,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:29:11,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:29:11,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:29:12,335 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-01-26 14:29:12,659 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:29:12,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:29:12,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:29:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:29:12,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:29:12,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:29:12,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643464945] [2021-01-26 14:29:12,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:29:12,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:29:12,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:29:12,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:29:12,830 INFO L87 Difference]: Start difference. First operand 68700 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:29:13,504 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 12 [2021-01-26 14:29:13,779 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-01-26 14:29:14,470 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 14 [2021-01-26 14:29:14,748 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-01-26 14:29:15,018 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-01-26 14:29:15,794 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 14 [2021-01-26 14:29:16,509 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2021-01-26 14:29:16,801 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2021-01-26 14:29:17,332 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-01-26 14:29:18,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:29:18,167 INFO L93 Difference]: Finished difference Result 69012 states and 152339 transitions. [2021-01-26 14:29:18,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-26 14:29:18,175 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:29:18,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:29:18,320 INFO L225 Difference]: With dead ends: 69012 [2021-01-26 14:29:18,321 INFO L226 Difference]: Without dead ends: 68860 [2021-01-26 14:29:18,321 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=412, Invalid=1568, Unknown=0, NotChecked=0, Total=1980 [2021-01-26 14:29:18,321 INFO L78 Accepts]: Start accepts. Automaton has 68860 states. Word has length 63 [2021-01-26 14:29:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:29:18,322 INFO L481 AbstractCegarLoop]: Abstraction has 68860 states. [2021-01-26 14:29:18,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:29:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand 68860 states. [2021-01-26 14:29:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:29:18,406 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:29:18,406 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:29:18,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:29:18,619 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:29:18,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:29:18,620 INFO L82 PathProgramCache]: Analyzing trace with hash -788631545, now seen corresponding path program 81 times [2021-01-26 14:29:18,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:29:18,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352336702] [2021-01-26 14:29:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:29:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:29:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:29:19,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352336702] [2021-01-26 14:29:19,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027332801] [2021-01-26 14:29:19,449 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 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 [2021-01-26 14:29:19,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-26 14:29:19,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:29:19,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:29:19,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:29:21,080 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-01-26 14:29:21,679 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-01-26 14:29:21,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:29:21,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:29:21,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:29:21,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:29:21,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:29:21,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:29:21,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:29:21,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:29:21,891 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-01-26 14:29:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:29:22,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:29:22,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:29:22,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817700244] [2021-01-26 14:29:22,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:29:22,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:29:22,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:29:22,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:29:22,017 INFO L87 Difference]: Start difference. First operand 68860 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:29:22,656 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2021-01-26 14:29:22,831 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 12 [2021-01-26 14:29:23,127 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-01-26 14:29:23,610 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2021-01-26 14:29:23,903 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-01-26 14:29:24,097 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 14 [2021-01-26 14:29:24,402 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-01-26 14:29:24,667 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-01-26 14:29:25,297 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 14 [2021-01-26 14:29:26,004 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2021-01-26 14:29:26,470 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 Received shutdown request... [2021-01-26 14:29:26,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-26 14:29:27,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:29:27,155 WARN L546 AbstractCegarLoop]: Verification canceled [2021-01-26 14:29:27,160 WARN L250 ceAbstractionStarter]: Timeout [2021-01-26 14:29:27,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.01 02:29:27 BasicIcfg [2021-01-26 14:29:27,160 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-26 14:29:27,169 INFO L168 Benchmark]: Toolchain (without parser) took 741546.19 ms. Allocated memory was 302.0 MB in the beginning and 4.1 GB in the end (delta: 3.8 GB). Free memory was 275.7 MB in the beginning and 1.0 GB in the end (delta: -761.0 MB). Peak memory consumption was 3.1 GB. Max. memory is 16.0 GB. [2021-01-26 14:29:27,170 INFO L168 Benchmark]: CDTParser took 0.72 ms. Allocated memory is still 302.0 MB. Free memory was 273.1 MB in the beginning and 273.0 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-01-26 14:29:27,170 INFO L168 Benchmark]: CACSL2BoogieTranslator took 851.98 ms. Allocated memory is still 302.0 MB. Free memory was 274.7 MB in the beginning and 277.4 MB in the end (delta: -2.7 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.0 GB. [2021-01-26 14:29:27,171 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.19 ms. Allocated memory is still 302.0 MB. Free memory was 277.4 MB in the beginning and 275.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-01-26 14:29:27,171 INFO L168 Benchmark]: Boogie Preprocessor took 30.35 ms. Allocated memory is still 302.0 MB. Free memory was 275.3 MB in the beginning and 274.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-01-26 14:29:27,172 INFO L168 Benchmark]: RCFGBuilder took 562.32 ms. Allocated memory is still 302.0 MB. Free memory was 274.3 MB in the beginning and 253.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-01-26 14:29:27,175 INFO L168 Benchmark]: TraceAbstraction took 740037.05 ms. Allocated memory was 302.0 MB in the beginning and 4.1 GB in the end (delta: 3.8 GB). Free memory was 252.2 MB in the beginning and 1.0 GB in the end (delta: -784.4 MB). Peak memory consumption was 3.0 GB. Max. memory is 16.0 GB. [2021-01-26 14:29:27,183 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.72 ms. Allocated memory is still 302.0 MB. Free memory was 273.1 MB in the beginning and 273.0 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 851.98 ms. Allocated memory is still 302.0 MB. Free memory was 274.7 MB in the beginning and 277.4 MB in the end (delta: -2.7 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 48.19 ms. Allocated memory is still 302.0 MB. Free memory was 277.4 MB in the beginning and 275.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 30.35 ms. Allocated memory is still 302.0 MB. Free memory was 275.3 MB in the beginning and 274.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 562.32 ms. Allocated memory is still 302.0 MB. Free memory was 274.3 MB in the beginning and 253.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 740037.05 ms. Allocated memory was 302.0 MB in the beginning and 4.1 GB in the end (delta: 3.8 GB). Free memory was 252.2 MB in the beginning and 1.0 GB in the end (delta: -784.4 MB). Peak memory consumption was 3.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 20]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 20). Cancelled while BasicCegarLoop was constructing difference of abstraction (68860states) and FLOYD_HOARE automaton (currently 29 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 43 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 739.8s, OverallIterations: 110, TraceHistogramMax: 6, AutomataDifference: 595.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 9815 SDtfs, 92234 SDslu, 118001 SDs, 0 SdLazy, 19897 SolverSat, 6753 SolverUnsat, 113 SolverUnknown, 0 SolverNotchecked, 247.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9285 GetRequests, 4931 SyntacticMatches, 26 SemanticMatches, 4327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56278 ImplicationChecksByTransitivity, 375.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68860occurred in iteration=109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 107.2s InterpolantComputationTime, 11599 NumberOfCodeBlocks, 11599 NumberOfCodeBlocksAsserted, 362 NumberOfCheckSat, 11386 ConstructedInterpolants, 6 QuantifiedInterpolants, 4892259 SizeOfPredicates, 424 NumberOfNonLiveVariables, 13939 ConjunctsInSsa, 1304 ConjunctsInUnsatCore, 213 InterpolantComputations, 7 PerfectInterpolantSequences, 0/3944 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process !SESSION 2021-01-26 14:17:01.899 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.9 java.vendor=AdoptOpenJDK BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_GB Framework arguments: -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i Command-line arguments: -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i !ENTRY org.eclipse.osgi 4 0 2021-01-26 14:29:27.482 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fe3e8479/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fe3e8479/.metadata/.log.