/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-6f57305 [2021-01-26 14:17:03,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-26 14:17:03,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-26 14:17:03,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-26 14:17:03,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-26 14:17:03,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-26 14:17:03,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-26 14:17:03,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-26 14:17:03,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-26 14:17:03,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-26 14:17:03,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-26 14:17:03,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-26 14:17:03,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-26 14:17:03,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-26 14:17:03,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-26 14:17:03,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-26 14:17:03,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-26 14:17:03,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-26 14:17:03,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-26 14:17:03,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-26 14:17:03,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-26 14:17:03,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-26 14:17:03,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-26 14:17:03,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-26 14:17:03,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-26 14:17:03,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-26 14:17:03,827 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-26 14:17:03,829 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-26 14:17:03,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-26 14:17:03,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-26 14:17:03,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-26 14:17:03,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-26 14:17:03,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-26 14:17:03,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-26 14:17:03,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-26 14:17:03,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-26 14:17:03,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-26 14:17:03,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-26 14:17:03,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-26 14:17:03,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-26 14:17:03,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-26 14:17:03,844 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 14:17:03,901 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-26 14:17:03,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-26 14:17:03,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-26 14:17:03,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-26 14:17:03,906 INFO L138 SettingsManager]: * Use SBE=true [2021-01-26 14:17:03,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-26 14:17:03,906 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-26 14:17:03,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-26 14:17:03,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-26 14:17:03,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-26 14:17:03,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-26 14:17:03,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-26 14:17:03,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-26 14:17:03,909 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-26 14:17:03,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-26 14:17:03,909 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-26 14:17:03,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-26 14:17:03,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-26 14:17:03,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-26 14:17:03,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-26 14:17:03,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-26 14:17:03,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-26 14:17:03,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-26 14:17:03,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-26 14:17:03,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-26 14:17:03,912 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-26 14:17:03,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-26 14:17:03,912 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-26 14:17:03,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-26 14:17:03,912 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-26 14:17:03,913 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-26 14:17:04,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-26 14:17:04,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-26 14:17:04,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-26 14:17:04,405 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-26 14:17:04,405 INFO L275 PluginConnector]: CDTParser initialized [2021-01-26 14:17:04,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2021-01-26 14:17:04,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3488aedd/b9f7c467f4c84994bd359da951a71cb3/FLAG7dfdd30b2 [2021-01-26 14:17:05,228 INFO L306 CDTParser]: Found 1 translation units. [2021-01-26 14:17:05,229 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2021-01-26 14:17:05,253 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3488aedd/b9f7c467f4c84994bd359da951a71cb3/FLAG7dfdd30b2 [2021-01-26 14:17:05,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3488aedd/b9f7c467f4c84994bd359da951a71cb3 [2021-01-26 14:17:05,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-26 14:17:05,505 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-26 14:17:05,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-26 14:17:05,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-26 14:17:05,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-26 14:17:05,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.01 02:17:05" (1/1) ... [2021-01-26 14:17:05,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b321351 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 14:17:05,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.01 02:17:05" (1/1) ... [2021-01-26 14:17:05,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-26 14:17:05,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-26 14:17:05,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-26 14:17:05,987 INFO L203 MainTranslator]: Completed pre-run [2021-01-26 14:17:06,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-26 14:17:06,222 INFO L208 MainTranslator]: Completed translation [2021-01-26 14:17:06,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06 WrapperNode [2021-01-26 14:17:06,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-26 14:17:06,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-26 14:17:06,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-26 14:17:06,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-26 14:17:06,233 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 14:17:06,249 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 14:17:06,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-26 14:17:06,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-26 14:17:06,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-26 14:17:06,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-26 14:17:06,281 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 14:17:06,282 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 14:17:06,285 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 14:17:06,285 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 14:17:06,292 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 14:17:06,296 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 14:17:06,298 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 14:17:06,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-26 14:17:06,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-26 14:17:06,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-26 14:17:06,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-26 14:17:06,304 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 14:17:06,385 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-26 14:17:06,386 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-26 14:17:06,386 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-26 14:17:06,386 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-26 14:17:06,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-26 14:17:06,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-26 14:17:06,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-26 14:17:06,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-26 14:17:06,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-26 14:17:06,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-26 14:17:06,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-26 14:17:06,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-26 14:17:06,389 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 14:17:06,818 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-26 14:17:06,819 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-26 14:17:06,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.01 02:17:06 BoogieIcfgContainer [2021-01-26 14:17:06,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-26 14:17:06,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-26 14:17:06,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-26 14:17:06,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-26 14:17:06,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.01 02:17:05" (1/3) ... [2021-01-26 14:17:06,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d8ec55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.01 02:17:06, skipping insertion in model container [2021-01-26 14:17:06,828 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 14:17:06,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d8ec55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.01 02:17:06, skipping insertion in model container [2021-01-26 14:17:06,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.01 02:17:06" (3/3) ... [2021-01-26 14:17:06,830 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2021-01-26 14:17:06,846 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-26 14:17:06,847 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-26 14:17:06,851 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-26 14:17:06,852 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-26 14:17:06,880 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,880 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,880 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,880 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,881 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,881 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,881 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,881 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,882 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,882 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,882 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,882 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,883 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,883 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,883 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,883 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,884 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,884 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,884 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,884 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,885 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,885 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,885 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,885 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,885 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,886 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,886 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,886 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,886 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,887 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,887 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,887 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,887 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,888 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,888 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,888 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,888 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,889 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,889 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,889 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,889 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,890 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,890 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,890 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,890 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,891 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,891 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,891 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,891 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,892 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,892 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,892 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,892 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,893 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,893 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,893 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,893 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,893 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,894 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,894 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,896 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,897 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,897 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,897 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,897 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,898 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,905 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,905 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,906 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,906 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,906 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,906 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:06,908 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-26 14:17:06,922 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-26 14:17:06,946 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-26 14:17:06,946 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-26 14:17:06,947 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-26 14:17:06,947 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-26 14:17:06,947 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-26 14:17:06,947 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-26 14:17:06,947 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-26 14:17:06,947 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-26 14:17:06,960 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2021-01-26 14:17:07,143 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 14:17:07,154 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 14:17:07,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-26 14:17:07,170 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:07,171 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 14:17:07,171 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:07,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:07,178 INFO L82 PathProgramCache]: Analyzing trace with hash 811106412, now seen corresponding path program 1 times [2021-01-26 14:17:07,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:07,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909753937] [2021-01-26 14:17:07,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:07,662 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 14:17:07,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909753937] [2021-01-26 14:17:07,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:07,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-26 14:17:07,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863014136] [2021-01-26 14:17:07,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-26 14:17:07,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:07,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-26 14:17:07,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-26 14:17:07,700 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 14:17:07,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:07,937 INFO L93 Difference]: Finished difference Result 4034 states and 11738 transitions. [2021-01-26 14:17:07,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-26 14:17:07,940 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 14:17:07,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:07,969 INFO L225 Difference]: With dead ends: 4034 [2021-01-26 14:17:07,970 INFO L226 Difference]: Without dead ends: 1472 [2021-01-26 14:17:07,971 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 14:17:07,972 INFO L78 Accepts]: Start accepts. Automaton has 1472 states. Word has length 28 [2021-01-26 14:17:07,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:07,973 INFO L481 AbstractCegarLoop]: Abstraction has 1472 states. [2021-01-26 14:17:07,973 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 14:17:07,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states. [2021-01-26 14:17:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-26 14:17:07,983 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:07,983 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 14:17:07,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-26 14:17:07,984 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:07,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:07,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2008820546, now seen corresponding path program 1 times [2021-01-26 14:17:07,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:07,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403089202] [2021-01-26 14:17:07,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:08,174 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 14:17:08,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403089202] [2021-01-26 14:17:08,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:08,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-26 14:17:08,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711054068] [2021-01-26 14:17:08,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-26 14:17:08,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:08,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-26 14:17:08,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-26 14:17:08,179 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 14:17:08,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:08,321 INFO L93 Difference]: Finished difference Result 1984 states and 5365 transitions. [2021-01-26 14:17:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-26 14:17:08,322 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 14:17:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:08,336 INFO L225 Difference]: With dead ends: 1984 [2021-01-26 14:17:08,336 INFO L226 Difference]: Without dead ends: 1726 [2021-01-26 14:17:08,337 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 14:17:08,337 INFO L78 Accepts]: Start accepts. Automaton has 1726 states. Word has length 33 [2021-01-26 14:17:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:08,338 INFO L481 AbstractCegarLoop]: Abstraction has 1726 states. [2021-01-26 14:17:08,338 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 14:17:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states. [2021-01-26 14:17:08,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-26 14:17:08,341 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:08,342 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 14:17:08,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-26 14:17:08,342 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:08,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:08,343 INFO L82 PathProgramCache]: Analyzing trace with hash 103991554, now seen corresponding path program 1 times [2021-01-26 14:17:08,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:08,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754661615] [2021-01-26 14:17:08,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:08,462 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 14:17:08,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754661615] [2021-01-26 14:17:08,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:08,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-26 14:17:08,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156085995] [2021-01-26 14:17:08,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-26 14:17:08,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:08,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-26 14:17:08,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-26 14:17:08,466 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 14:17:08,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:08,626 INFO L93 Difference]: Finished difference Result 2110 states and 5584 transitions. [2021-01-26 14:17:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-26 14:17:08,626 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 14:17:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:08,639 INFO L225 Difference]: With dead ends: 2110 [2021-01-26 14:17:08,640 INFO L226 Difference]: Without dead ends: 1806 [2021-01-26 14:17:08,640 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 14:17:08,640 INFO L78 Accepts]: Start accepts. Automaton has 1806 states. Word has length 33 [2021-01-26 14:17:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:08,641 INFO L481 AbstractCegarLoop]: Abstraction has 1806 states. [2021-01-26 14:17:08,641 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 14:17:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states. [2021-01-26 14:17:08,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-26 14:17:08,644 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:08,644 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 14:17:08,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-26 14:17:08,644 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:08,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:08,645 INFO L82 PathProgramCache]: Analyzing trace with hash -899974956, now seen corresponding path program 2 times [2021-01-26 14:17:08,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:08,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148745223] [2021-01-26 14:17:08,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:08,758 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 14:17:08,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148745223] [2021-01-26 14:17:08,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:08,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-26 14:17:08,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236690769] [2021-01-26 14:17:08,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-26 14:17:08,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:08,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-26 14:17:08,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-26 14:17:08,761 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 14:17:08,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:08,905 INFO L93 Difference]: Finished difference Result 2318 states and 6128 transitions. [2021-01-26 14:17:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-26 14:17:08,905 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 14:17:08,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:08,919 INFO L225 Difference]: With dead ends: 2318 [2021-01-26 14:17:08,920 INFO L226 Difference]: Without dead ends: 1996 [2021-01-26 14:17:08,920 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 14:17:08,920 INFO L78 Accepts]: Start accepts. Automaton has 1996 states. Word has length 33 [2021-01-26 14:17:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:08,922 INFO L481 AbstractCegarLoop]: Abstraction has 1996 states. [2021-01-26 14:17:08,922 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 14:17:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states. [2021-01-26 14:17:08,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:08,926 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:08,927 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 14:17:08,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-26 14:17:08,927 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:08,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:08,928 INFO L82 PathProgramCache]: Analyzing trace with hash -421493469, now seen corresponding path program 1 times [2021-01-26 14:17:08,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:08,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808562979] [2021-01-26 14:17:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:09,066 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 14:17:09,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808562979] [2021-01-26 14:17:09,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417917180] [2021-01-26 14:17:09,067 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 14:17:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:09,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-26 14:17:09,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:09,270 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:09,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:09,312 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 14:17:09,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:09,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-26 14:17:09,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505542850] [2021-01-26 14:17:09,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-26 14:17:09,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:09,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-26 14:17:09,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-26 14:17:09,315 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 14:17:09,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:09,586 INFO L93 Difference]: Finished difference Result 2908 states and 7595 transitions. [2021-01-26 14:17:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-26 14:17:09,587 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 14:17:09,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:09,604 INFO L225 Difference]: With dead ends: 2908 [2021-01-26 14:17:09,604 INFO L226 Difference]: Without dead ends: 2544 [2021-01-26 14:17:09,605 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:17:09,605 INFO L78 Accepts]: Start accepts. Automaton has 2544 states. Word has length 38 [2021-01-26 14:17:09,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:09,606 INFO L481 AbstractCegarLoop]: Abstraction has 2544 states. [2021-01-26 14:17:09,606 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 14:17:09,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states. [2021-01-26 14:17:09,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:09,610 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:09,610 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 14:17:09,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:09,825 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:09,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:09,826 INFO L82 PathProgramCache]: Analyzing trace with hash -869705744, now seen corresponding path program 1 times [2021-01-26 14:17:09,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:09,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280326683] [2021-01-26 14:17:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:10,002 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 14:17:10,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280326683] [2021-01-26 14:17:10,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:10,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-26 14:17:10,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592045816] [2021-01-26 14:17:10,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-26 14:17:10,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:10,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-26 14:17:10,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-26 14:17:10,006 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 14:17:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:10,187 INFO L93 Difference]: Finished difference Result 2736 states and 7057 transitions. [2021-01-26 14:17:10,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-26 14:17:10,188 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 14:17:10,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:10,205 INFO L225 Difference]: With dead ends: 2736 [2021-01-26 14:17:10,206 INFO L226 Difference]: Without dead ends: 2584 [2021-01-26 14:17:10,206 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 14:17:10,206 INFO L78 Accepts]: Start accepts. Automaton has 2584 states. Word has length 38 [2021-01-26 14:17:10,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:10,207 INFO L481 AbstractCegarLoop]: Abstraction has 2584 states. [2021-01-26 14:17:10,207 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 14:17:10,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states. [2021-01-26 14:17:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:10,212 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:10,212 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 14:17:10,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-26 14:17:10,214 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:10,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:10,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1873672254, now seen corresponding path program 2 times [2021-01-26 14:17:10,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:10,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392635415] [2021-01-26 14:17:10,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:10,407 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 14:17:10,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392635415] [2021-01-26 14:17:10,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:10,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-26 14:17:10,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101850560] [2021-01-26 14:17:10,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-26 14:17:10,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:10,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-26 14:17:10,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-26 14:17:10,410 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 14:17:10,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:10,618 INFO L93 Difference]: Finished difference Result 3152 states and 8081 transitions. [2021-01-26 14:17:10,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-26 14:17:10,618 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 14:17:10,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:10,640 INFO L225 Difference]: With dead ends: 3152 [2021-01-26 14:17:10,640 INFO L226 Difference]: Without dead ends: 2894 [2021-01-26 14:17:10,641 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:17:10,641 INFO L78 Accepts]: Start accepts. Automaton has 2894 states. Word has length 38 [2021-01-26 14:17:10,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:10,641 INFO L481 AbstractCegarLoop]: Abstraction has 2894 states. [2021-01-26 14:17:10,642 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 14:17:10,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states. [2021-01-26 14:17:10,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:10,647 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:10,647 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 14:17:10,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-26 14:17:10,647 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:10,648 INFO L82 PathProgramCache]: Analyzing trace with hash 587213024, now seen corresponding path program 3 times [2021-01-26 14:17:10,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:10,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745507272] [2021-01-26 14:17:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:10,769 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 14:17:10,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745507272] [2021-01-26 14:17:10,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:10,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-26 14:17:10,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069359486] [2021-01-26 14:17:10,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-26 14:17:10,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:10,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-26 14:17:10,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-26 14:17:10,772 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 14:17:11,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:11,028 INFO L93 Difference]: Finished difference Result 3742 states and 9548 transitions. [2021-01-26 14:17:11,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-26 14:17:11,029 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 14:17:11,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:11,073 INFO L225 Difference]: With dead ends: 3742 [2021-01-26 14:17:11,073 INFO L226 Difference]: Without dead ends: 3314 [2021-01-26 14:17:11,075 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-01-26 14:17:11,075 INFO L78 Accepts]: Start accepts. Automaton has 3314 states. Word has length 38 [2021-01-26 14:17:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:11,075 INFO L481 AbstractCegarLoop]: Abstraction has 3314 states. [2021-01-26 14:17:11,076 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 14:17:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3314 states. [2021-01-26 14:17:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:11,087 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:11,087 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 14:17:11,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-26 14:17:11,087 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:11,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:11,088 INFO L82 PathProgramCache]: Analyzing trace with hash 810819243, now seen corresponding path program 1 times [2021-01-26 14:17:11,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:11,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662914899] [2021-01-26 14:17:11,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:11,279 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 14:17:11,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662914899] [2021-01-26 14:17:11,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799444354] [2021-01-26 14:17:11,281 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 14:17:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:11,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:11,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:11,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:11,517 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 14:17:11,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:11,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:11,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383760919] [2021-01-26 14:17:11,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:11,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:11,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:11,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:11,520 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 14:17:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:11,715 INFO L93 Difference]: Finished difference Result 3506 states and 8882 transitions. [2021-01-26 14:17:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-26 14:17:11,716 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 14:17:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:11,727 INFO L225 Difference]: With dead ends: 3506 [2021-01-26 14:17:11,727 INFO L226 Difference]: Without dead ends: 3354 [2021-01-26 14:17:11,727 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 14:17:11,728 INFO L78 Accepts]: Start accepts. Automaton has 3354 states. Word has length 43 [2021-01-26 14:17:11,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:11,729 INFO L481 AbstractCegarLoop]: Abstraction has 3354 states. [2021-01-26 14:17:11,729 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 14:17:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states. [2021-01-26 14:17:11,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:11,736 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:11,736 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 14:17:11,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:11,952 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:11,953 INFO L82 PathProgramCache]: Analyzing trace with hash -193147267, now seen corresponding path program 2 times [2021-01-26 14:17:11,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:11,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429807240] [2021-01-26 14:17:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:12,077 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 14:17:12,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429807240] [2021-01-26 14:17:12,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829316090] [2021-01-26 14:17:12,078 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 14:17:12,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:12,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:12,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:12,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:12,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:12,206 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 14:17:12,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:12,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-01-26 14:17:12,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901121974] [2021-01-26 14:17:12,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-26 14:17:12,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:12,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-26 14:17:12,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:17:12,208 INFO L87 Difference]: Start difference. First operand 3354 states. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 14:17:12,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:12,550 INFO L93 Difference]: Finished difference Result 4258 states and 10770 transitions. [2021-01-26 14:17:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:17:12,551 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 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 14:17:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:12,562 INFO L225 Difference]: With dead ends: 4258 [2021-01-26 14:17:12,563 INFO L226 Difference]: Without dead ends: 3894 [2021-01-26 14:17:12,563 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-01-26 14:17:12,563 INFO L78 Accepts]: Start accepts. Automaton has 3894 states. Word has length 43 [2021-01-26 14:17:12,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:12,564 INFO L481 AbstractCegarLoop]: Abstraction has 3894 states. [2021-01-26 14:17:12,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 14:17:12,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3894 states. [2021-01-26 14:17:12,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:12,571 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:12,572 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 14:17:12,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-26 14:17:12,786 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:12,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:12,787 INFO L82 PathProgramCache]: Analyzing trace with hash -2089322251, now seen corresponding path program 1 times [2021-01-26 14:17:12,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:12,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644805585] [2021-01-26 14:17:12,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:12,915 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 14:17:12,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644805585] [2021-01-26 14:17:12,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893576140] [2021-01-26 14:17:12,916 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 14:17:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:12,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:12,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:13,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:13,103 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 14:17:13,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:13,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:13,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092993746] [2021-01-26 14:17:13,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:13,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:13,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:13,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:13,110 INFO L87 Difference]: Start difference. First operand 3894 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 14:17:13,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:13,417 INFO L93 Difference]: Finished difference Result 4518 states and 11160 transitions. [2021-01-26 14:17:13,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-26 14:17:13,418 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 14:17:13,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:13,429 INFO L225 Difference]: With dead ends: 4518 [2021-01-26 14:17:13,429 INFO L226 Difference]: Without dead ends: 4214 [2021-01-26 14:17:13,430 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:17:13,430 INFO L78 Accepts]: Start accepts. Automaton has 4214 states. Word has length 43 [2021-01-26 14:17:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:13,430 INFO L481 AbstractCegarLoop]: Abstraction has 4214 states. [2021-01-26 14:17:13,431 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 14:17:13,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4214 states. [2021-01-26 14:17:13,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:13,438 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:13,438 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 14:17:13,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:13,641 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:13,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:13,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1853174015, now seen corresponding path program 2 times [2021-01-26 14:17:13,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:13,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634738136] [2021-01-26 14:17:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:13,753 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 14:17:13,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634738136] [2021-01-26 14:17:13,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185225477] [2021-01-26 14:17:13,754 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 14:17:13,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:13,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:13,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:13,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:13,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:13,954 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 14:17:13,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:13,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:13,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777531194] [2021-01-26 14:17:13,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:13,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:13,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:13,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:13,966 INFO L87 Difference]: Start difference. First operand 4214 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 14:17:14,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:14,320 INFO L93 Difference]: Finished difference Result 4638 states and 11400 transitions. [2021-01-26 14:17:14,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:17:14,321 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 14:17:14,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:14,335 INFO L225 Difference]: With dead ends: 4638 [2021-01-26 14:17:14,335 INFO L226 Difference]: Without dead ends: 4334 [2021-01-26 14:17:14,336 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 14:17:14,336 INFO L78 Accepts]: Start accepts. Automaton has 4334 states. Word has length 43 [2021-01-26 14:17:14,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:14,336 INFO L481 AbstractCegarLoop]: Abstraction has 4334 states. [2021-01-26 14:17:14,336 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 14:17:14,336 INFO L276 IsEmpty]: Start isEmpty. Operand 4334 states. [2021-01-26 14:17:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:14,343 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:14,343 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 14:17:14,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-26 14:17:14,556 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:14,557 INFO L82 PathProgramCache]: Analyzing trace with hash 2013675815, now seen corresponding path program 3 times [2021-01-26 14:17:14,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:14,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528079853] [2021-01-26 14:17:14,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:14,724 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 14:17:14,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528079853] [2021-01-26 14:17:14,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102801945] [2021-01-26 14:17:14,725 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 14:17:14,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-26 14:17:14,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:14,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:14,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:14,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:14,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:14,919 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 14:17:14,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:14,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:14,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514147268] [2021-01-26 14:17:14,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:14,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:14,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:14,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:14,922 INFO L87 Difference]: Start difference. First operand 4334 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 14:17:15,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:15,645 INFO L93 Difference]: Finished difference Result 6124 states and 15171 transitions. [2021-01-26 14:17:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-26 14:17:15,646 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 14:17:15,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:15,661 INFO L225 Difference]: With dead ends: 6124 [2021-01-26 14:17:15,661 INFO L226 Difference]: Without dead ends: 5484 [2021-01-26 14:17:15,662 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 14:17:15,662 INFO L78 Accepts]: Start accepts. Automaton has 5484 states. Word has length 43 [2021-01-26 14:17:15,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:15,663 INFO L481 AbstractCegarLoop]: Abstraction has 5484 states. [2021-01-26 14:17:15,663 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 14:17:15,663 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states. [2021-01-26 14:17:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:15,672 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:15,672 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 14:17:15,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:15,885 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:15,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:15,886 INFO L82 PathProgramCache]: Analyzing trace with hash 264667651, now seen corresponding path program 2 times [2021-01-26 14:17:15,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:15,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181324183] [2021-01-26 14:17:15,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:16,081 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 14:17:16,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181324183] [2021-01-26 14:17:16,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836775855] [2021-01-26 14:17:16,082 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 14:17:16,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:16,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:16,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:16,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:16,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:16,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:16,322 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 14:17:16,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:16,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-26 14:17:16,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759868178] [2021-01-26 14:17:16,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-26 14:17:16,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:16,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-26 14:17:16,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-26 14:17:16,325 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 14:17:16,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:16,657 INFO L93 Difference]: Finished difference Result 6556 states and 16031 transitions. [2021-01-26 14:17:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-26 14:17:16,659 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 14:17:16,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:16,674 INFO L225 Difference]: With dead ends: 6556 [2021-01-26 14:17:16,674 INFO L226 Difference]: Without dead ends: 6192 [2021-01-26 14:17:16,675 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-01-26 14:17:16,675 INFO L78 Accepts]: Start accepts. Automaton has 6192 states. Word has length 48 [2021-01-26 14:17:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:16,675 INFO L481 AbstractCegarLoop]: Abstraction has 6192 states. [2021-01-26 14:17:16,675 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 14:17:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states. [2021-01-26 14:17:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:16,733 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:16,734 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 14:17:16,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-26 14:17:16,935 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:16,936 INFO L82 PathProgramCache]: Analyzing trace with hash -183544624, now seen corresponding path program 3 times [2021-01-26 14:17:16,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:16,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475732298] [2021-01-26 14:17:16,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:17,070 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 14:17:17,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475732298] [2021-01-26 14:17:17,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583547219] [2021-01-26 14:17:17,071 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 14:17:17,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:17:17,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:17,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:17:17,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:17,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:17,195 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 14:17:17,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:17,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-26 14:17:17,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134406599] [2021-01-26 14:17:17,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-26 14:17:17,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:17,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-26 14:17:17,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:17:17,198 INFO L87 Difference]: Start difference. First operand 6192 states. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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 14:17:17,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:17,413 INFO L93 Difference]: Finished difference Result 6384 states and 15493 transitions. [2021-01-26 14:17:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-26 14:17:17,414 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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 48 [2021-01-26 14:17:17,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:17,422 INFO L225 Difference]: With dead ends: 6384 [2021-01-26 14:17:17,422 INFO L226 Difference]: Without dead ends: 6232 [2021-01-26 14:17:17,422 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-01-26 14:17:17,423 INFO L78 Accepts]: Start accepts. Automaton has 6232 states. Word has length 48 [2021-01-26 14:17:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:17,423 INFO L481 AbstractCegarLoop]: Abstraction has 6232 states. [2021-01-26 14:17:17,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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 14:17:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states. [2021-01-26 14:17:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:17,433 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:17,433 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 14:17:17,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-26 14:17:17,647 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:17,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:17,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1187511134, now seen corresponding path program 4 times [2021-01-26 14:17:17,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:17,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548124102] [2021-01-26 14:17:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:17,786 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 14:17:17,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548124102] [2021-01-26 14:17:17,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524045560] [2021-01-26 14:17:17,786 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 14:17:17,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:17:17,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:17,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:17,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:17,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:18,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:18,057 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 14:17:18,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:18,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:18,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191281820] [2021-01-26 14:17:18,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:18,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:18,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:18,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:18,061 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 14:17:18,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:18,644 INFO L93 Difference]: Finished difference Result 7286 states and 17776 transitions. [2021-01-26 14:17:18,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-26 14:17:18,645 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 14:17:18,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:18,656 INFO L225 Difference]: With dead ends: 7286 [2021-01-26 14:17:18,656 INFO L226 Difference]: Without dead ends: 6922 [2021-01-26 14:17:18,657 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:17:18,657 INFO L78 Accepts]: Start accepts. Automaton has 6922 states. Word has length 48 [2021-01-26 14:17:18,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:18,658 INFO L481 AbstractCegarLoop]: Abstraction has 6922 states. [2021-01-26 14:17:18,658 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 14:17:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 6922 states. [2021-01-26 14:17:18,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:18,667 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:18,668 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 14:17:18,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-26 14:17:18,881 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:18,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:18,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1211281178, now seen corresponding path program 1 times [2021-01-26 14:17:18,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:18,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899780804] [2021-01-26 14:17:18,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:19,108 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 14:17:19,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899780804] [2021-01-26 14:17:19,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118740770] [2021-01-26 14:17:19,109 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 14:17:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:19,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:19,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:19,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:19,347 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 14:17:19,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:19,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:19,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617932286] [2021-01-26 14:17:19,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:19,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:19,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:19,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:19,354 INFO L87 Difference]: Start difference. First operand 6922 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 14:17:19,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:19,678 INFO L93 Difference]: Finished difference Result 7234 states and 17478 transitions. [2021-01-26 14:17:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-26 14:17:19,678 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 14:17:19,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:19,687 INFO L225 Difference]: With dead ends: 7234 [2021-01-26 14:17:19,688 INFO L226 Difference]: Without dead ends: 7082 [2021-01-26 14:17:19,688 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 14:17:19,688 INFO L78 Accepts]: Start accepts. Automaton has 7082 states. Word has length 48 [2021-01-26 14:17:19,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:19,689 INFO L481 AbstractCegarLoop]: Abstraction has 7082 states. [2021-01-26 14:17:19,689 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 14:17:19,689 INFO L276 IsEmpty]: Start isEmpty. Operand 7082 states. [2021-01-26 14:17:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:19,698 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:19,698 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 14:17:19,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-26 14:17:19,913 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:19,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:19,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1447429414, now seen corresponding path program 2 times [2021-01-26 14:17:19,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:19,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560899048] [2021-01-26 14:17:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:20,057 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 14:17:20,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560899048] [2021-01-26 14:17:20,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499083502] [2021-01-26 14:17:20,058 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 14:17:20,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:20,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:20,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:20,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:20,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:20,282 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 14:17:20,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:20,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:20,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179881560] [2021-01-26 14:17:20,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:20,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:20,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:20,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:20,284 INFO L87 Difference]: Start difference. First operand 7082 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 14:17:20,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:20,690 INFO L93 Difference]: Finished difference Result 7314 states and 17638 transitions. [2021-01-26 14:17:20,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:17:20,690 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 14:17:20,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:20,701 INFO L225 Difference]: With dead ends: 7314 [2021-01-26 14:17:20,701 INFO L226 Difference]: Without dead ends: 7162 [2021-01-26 14:17:20,702 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-01-26 14:17:20,702 INFO L78 Accepts]: Start accepts. Automaton has 7162 states. Word has length 48 [2021-01-26 14:17:20,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:20,702 INFO L481 AbstractCegarLoop]: Abstraction has 7162 states. [2021-01-26 14:17:20,702 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 14:17:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 7162 states. [2021-01-26 14:17:20,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:20,711 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:20,712 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 14:17:20,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-26 14:17:20,926 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:20,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:20,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1019311948, now seen corresponding path program 3 times [2021-01-26 14:17:20,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:20,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401022901] [2021-01-26 14:17:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:21,087 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 14:17:21,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401022901] [2021-01-26 14:17:21,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603667489] [2021-01-26 14:17:21,088 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 14:17:21,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-26 14:17:21,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:21,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:21,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:21,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:21,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:21,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:21,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:21,417 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 14:17:21,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:21,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-26 14:17:21,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306398562] [2021-01-26 14:17:21,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-26 14:17:21,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:21,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-26 14:17:21,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-01-26 14:17:21,419 INFO L87 Difference]: Start difference. First operand 7162 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 14:17:22,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:22,527 INFO L93 Difference]: Finished difference Result 9524 states and 22919 transitions. [2021-01-26 14:17:22,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-26 14:17:22,528 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 14:17:22,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:22,538 INFO L225 Difference]: With dead ends: 9524 [2021-01-26 14:17:22,538 INFO L226 Difference]: Without dead ends: 8832 [2021-01-26 14:17:22,539 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=1727, Unknown=0, NotChecked=0, Total=2162 [2021-01-26 14:17:22,539 INFO L78 Accepts]: Start accepts. Automaton has 8832 states. Word has length 48 [2021-01-26 14:17:22,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:22,540 INFO L481 AbstractCegarLoop]: Abstraction has 8832 states. [2021-01-26 14:17:22,540 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 14:17:22,540 INFO L276 IsEmpty]: Start isEmpty. Operand 8832 states. [2021-01-26 14:17:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:22,547 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:22,547 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 14:17:22,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:22,757 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:22,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:22,757 INFO L82 PathProgramCache]: Analyzing trace with hash 310617624, now seen corresponding path program 4 times [2021-01-26 14:17:22,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:22,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444123121] [2021-01-26 14:17:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:22,910 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 14:17:22,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444123121] [2021-01-26 14:17:22,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577577824] [2021-01-26 14:17:22,911 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 14:17:22,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:17:22,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:22,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:22,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:23,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:23,099 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 14:17:23,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:23,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:23,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464214027] [2021-01-26 14:17:23,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:23,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:23,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:23,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:23,101 INFO L87 Difference]: Start difference. First operand 8832 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 14:17:23,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:23,528 INFO L93 Difference]: Finished difference Result 9424 states and 22333 transitions. [2021-01-26 14:17:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-26 14:17:23,528 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 14:17:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:23,542 INFO L225 Difference]: With dead ends: 9424 [2021-01-26 14:17:23,542 INFO L226 Difference]: Without dead ends: 9272 [2021-01-26 14:17:23,542 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 14:17:23,542 INFO L78 Accepts]: Start accepts. Automaton has 9272 states. Word has length 48 [2021-01-26 14:17:23,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:23,543 INFO L481 AbstractCegarLoop]: Abstraction has 9272 states. [2021-01-26 14:17:23,543 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 14:17:23,543 INFO L276 IsEmpty]: Start isEmpty. Operand 9272 states. [2021-01-26 14:17:23,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:23,553 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:23,554 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 14:17:23,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-01-26 14:17:23,768 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:23,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:23,769 INFO L82 PathProgramCache]: Analyzing trace with hash -958721652, now seen corresponding path program 5 times [2021-01-26 14:17:23,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:23,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154975797] [2021-01-26 14:17:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:23,890 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 14:17:23,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154975797] [2021-01-26 14:17:23,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983554368] [2021-01-26 14:17:23,890 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 14:17:23,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:23,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:23,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:23,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:24,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:24,066 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 14:17:24,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:24,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:24,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15455030] [2021-01-26 14:17:24,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:24,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:24,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:24,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:24,070 INFO L87 Difference]: Start difference. First operand 9272 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 14:17:24,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:24,553 INFO L93 Difference]: Finished difference Result 9864 states and 23213 transitions. [2021-01-26 14:17:24,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-26 14:17:24,554 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 14:17:24,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:24,567 INFO L225 Difference]: With dead ends: 9864 [2021-01-26 14:17:24,567 INFO L226 Difference]: Without dead ends: 9712 [2021-01-26 14:17:24,568 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:17:24,568 INFO L78 Accepts]: Start accepts. Automaton has 9712 states. Word has length 48 [2021-01-26 14:17:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:24,568 INFO L481 AbstractCegarLoop]: Abstraction has 9712 states. [2021-01-26 14:17:24,569 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 14:17:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 9712 states. [2021-01-26 14:17:24,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:24,579 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:24,580 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 14:17:24,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:24,793 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:24,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:24,794 INFO L82 PathProgramCache]: Analyzing trace with hash 763359212, now seen corresponding path program 6 times [2021-01-26 14:17:24,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:24,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203355118] [2021-01-26 14:17:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:24,915 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 14:17:24,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203355118] [2021-01-26 14:17:24,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265922609] [2021-01-26 14:17:24,915 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 14:17:24,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-26 14:17:24,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:24,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:24,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:25,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:25,086 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 14:17:25,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:25,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:25,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980406721] [2021-01-26 14:17:25,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:25,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:25,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:25,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:25,089 INFO L87 Difference]: Start difference. First operand 9712 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 14:17:25,386 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2021-01-26 14:17:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:25,788 INFO L93 Difference]: Finished difference Result 10144 states and 23773 transitions. [2021-01-26 14:17:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:17:25,789 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 14:17:25,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:25,806 INFO L225 Difference]: With dead ends: 10144 [2021-01-26 14:17:25,807 INFO L226 Difference]: Without dead ends: 9992 [2021-01-26 14:17:25,808 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:17:25,808 INFO L78 Accepts]: Start accepts. Automaton has 9992 states. Word has length 48 [2021-01-26 14:17:25,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:25,809 INFO L481 AbstractCegarLoop]: Abstraction has 9992 states. [2021-01-26 14:17:25,809 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 14:17:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 9992 states. [2021-01-26 14:17:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:25,834 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:25,834 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 14:17:26,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-26 14:17:26,048 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:26,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:26,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1519359984, now seen corresponding path program 7 times [2021-01-26 14:17:26,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:26,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269480756] [2021-01-26 14:17:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:26,204 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 14:17:26,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269480756] [2021-01-26 14:17:26,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367541443] [2021-01-26 14:17:26,204 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 14:17:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:26,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:26,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:26,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:26,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:26,422 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 14:17:26,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:26,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-26 14:17:26,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596729571] [2021-01-26 14:17:26,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-26 14:17:26,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:26,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-26 14:17:26,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-01-26 14:17:26,427 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 14:17:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:27,633 INFO L93 Difference]: Finished difference Result 12930 states and 30398 transitions. [2021-01-26 14:17:27,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-26 14:17:27,633 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 14:17:27,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:27,646 INFO L225 Difference]: With dead ends: 12930 [2021-01-26 14:17:27,646 INFO L226 Difference]: Without dead ends: 12132 [2021-01-26 14:17:27,648 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=598, Invalid=2264, Unknown=0, NotChecked=0, Total=2862 [2021-01-26 14:17:27,648 INFO L78 Accepts]: Start accepts. Automaton has 12132 states. Word has length 48 [2021-01-26 14:17:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:27,648 INFO L481 AbstractCegarLoop]: Abstraction has 12132 states. [2021-01-26 14:17:27,648 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 14:17:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 12132 states. [2021-01-26 14:17:27,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:27,661 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:27,661 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 14:17:27,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:27,862 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:27,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:27,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1376333259, now seen corresponding path program 5 times [2021-01-26 14:17:27,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:27,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671522224] [2021-01-26 14:17:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:28,080 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 14:17:28,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671522224] [2021-01-26 14:17:28,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624229409] [2021-01-26 14:17:28,081 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 14:17:28,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:17:28,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:28,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:28,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:28,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:28,279 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 14:17:28,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:28,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:28,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300382655] [2021-01-26 14:17:28,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:28,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:28,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:28,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:28,285 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 14:17:28,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:28,522 INFO L93 Difference]: Finished difference Result 12324 states and 28703 transitions. [2021-01-26 14:17:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-26 14:17:28,522 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 14:17:28,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:28,540 INFO L225 Difference]: With dead ends: 12324 [2021-01-26 14:17:28,541 INFO L226 Difference]: Without dead ends: 12172 [2021-01-26 14:17:28,541 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-01-26 14:17:28,541 INFO L78 Accepts]: Start accepts. Automaton has 12172 states. Word has length 53 [2021-01-26 14:17:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:28,542 INFO L481 AbstractCegarLoop]: Abstraction has 12172 states. [2021-01-26 14:17:28,542 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 14:17:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 12172 states. [2021-01-26 14:17:28,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:28,556 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:28,556 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 14:17:28,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-26 14:17:28,771 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:28,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:28,772 INFO L82 PathProgramCache]: Analyzing trace with hash 372366749, now seen corresponding path program 6 times [2021-01-26 14:17:28,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:28,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271256003] [2021-01-26 14:17:28,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:28,903 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 14:17:28,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271256003] [2021-01-26 14:17:28,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550201294] [2021-01-26 14:17:28,904 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 14:17:28,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:17:28,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:28,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:17:28,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:29,015 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:29,027 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 14:17:29,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:29,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-01-26 14:17:29,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084423915] [2021-01-26 14:17:29,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:29,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:29,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:29,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:29,029 INFO L87 Difference]: Start difference. First operand 12172 states. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 14:17:29,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:29,433 INFO L93 Difference]: Finished difference Result 12956 states and 30351 transitions. [2021-01-26 14:17:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:17:29,433 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 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 14:17:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:29,446 INFO L225 Difference]: With dead ends: 12956 [2021-01-26 14:17:29,447 INFO L226 Difference]: Without dead ends: 12592 [2021-01-26 14:17:29,447 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-01-26 14:17:29,447 INFO L78 Accepts]: Start accepts. Automaton has 12592 states. Word has length 53 [2021-01-26 14:17:29,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:29,447 INFO L481 AbstractCegarLoop]: Abstraction has 12592 states. [2021-01-26 14:17:29,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 14:17:29,448 INFO L276 IsEmpty]: Start isEmpty. Operand 12592 states. [2021-01-26 14:17:29,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:29,458 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:29,458 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 14:17:29,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-26 14:17:29,664 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:29,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:29,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1523808235, now seen corresponding path program 8 times [2021-01-26 14:17:29,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:29,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879288177] [2021-01-26 14:17:29,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:29,807 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 14:17:29,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879288177] [2021-01-26 14:17:29,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058627185] [2021-01-26 14:17:29,808 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 14:17:29,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:29,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:29,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:29,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:30,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:30,044 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 14:17:30,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:30,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:30,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299010190] [2021-01-26 14:17:30,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:30,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:30,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:30,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:30,047 INFO L87 Difference]: Start difference. First operand 12592 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 14:17:30,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:30,568 INFO L93 Difference]: Finished difference Result 12904 states and 30053 transitions. [2021-01-26 14:17:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:17:30,569 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 14:17:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:30,590 INFO L225 Difference]: With dead ends: 12904 [2021-01-26 14:17:30,590 INFO L226 Difference]: Without dead ends: 12752 [2021-01-26 14:17:30,590 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-01-26 14:17:30,590 INFO L78 Accepts]: Start accepts. Automaton has 12752 states. Word has length 53 [2021-01-26 14:17:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:30,593 INFO L481 AbstractCegarLoop]: Abstraction has 12752 states. [2021-01-26 14:17:30,593 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 14:17:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 12752 states. [2021-01-26 14:17:30,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:30,608 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:30,608 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 14:17:30,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-26 14:17:30,822 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:30,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:30,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1287659999, now seen corresponding path program 9 times [2021-01-26 14:17:30,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:30,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525019992] [2021-01-26 14:17:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:30,994 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 14:17:30,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525019992] [2021-01-26 14:17:30,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778767940] [2021-01-26 14:17:30,995 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 14:17:31,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:17:31,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:31,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:17:31,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:31,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:31,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:31,220 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 14:17:31,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:31,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-01-26 14:17:31,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950176040] [2021-01-26 14:17:31,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:31,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:31,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:31,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:31,222 INFO L87 Difference]: Start difference. First operand 12752 states. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:31,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:31,732 INFO L93 Difference]: Finished difference Result 13344 states and 30933 transitions. [2021-01-26 14:17:31,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-26 14:17:31,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:31,748 INFO L225 Difference]: With dead ends: 13344 [2021-01-26 14:17:31,748 INFO L226 Difference]: Without dead ends: 13192 [2021-01-26 14:17:31,749 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2021-01-26 14:17:31,749 INFO L78 Accepts]: Start accepts. Automaton has 13192 states. Word has length 53 [2021-01-26 14:17:31,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:31,749 INFO L481 AbstractCegarLoop]: Abstraction has 13192 states. [2021-01-26 14:17:31,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand 13192 states. [2021-01-26 14:17:31,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:31,760 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:31,760 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 14:17:31,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-26 14:17:31,975 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:31,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:31,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1715777465, now seen corresponding path program 10 times [2021-01-26 14:17:31,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:31,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868412764] [2021-01-26 14:17:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:32,120 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 14:17:32,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868412764] [2021-01-26 14:17:32,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235388780] [2021-01-26 14:17:32,121 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 14:17:32,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:17:32,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:32,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:17:32,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:32,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:32,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:32,387 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 14:17:32,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:32,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:32,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787877874] [2021-01-26 14:17:32,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:32,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:32,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:32,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:32,390 INFO L87 Difference]: Start difference. First operand 13192 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 14:17:33,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:33,383 INFO L93 Difference]: Finished difference Result 14786 states and 34486 transitions. [2021-01-26 14:17:33,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-26 14:17:33,384 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 14:17:33,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:33,405 INFO L225 Difference]: With dead ends: 14786 [2021-01-26 14:17:33,405 INFO L226 Difference]: Without dead ends: 14422 [2021-01-26 14:17:33,406 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=399, Invalid=1407, Unknown=0, NotChecked=0, Total=1806 [2021-01-26 14:17:33,406 INFO L78 Accepts]: Start accepts. Automaton has 14422 states. Word has length 53 [2021-01-26 14:17:33,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:33,406 INFO L481 AbstractCegarLoop]: Abstraction has 14422 states. [2021-01-26 14:17:33,406 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 14:17:33,406 INFO L276 IsEmpty]: Start isEmpty. Operand 14422 states. [2021-01-26 14:17:33,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:33,421 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:33,421 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:33,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-26 14:17:33,636 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:33,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:33,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1870495507, now seen corresponding path program 11 times [2021-01-26 14:17:33,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:33,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413037944] [2021-01-26 14:17:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:33,776 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 14:17:33,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413037944] [2021-01-26 14:17:33,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640673295] [2021-01-26 14:17:33,776 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 14:17:33,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:17:33,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:33,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:33,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:34,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:34,036 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 14:17:34,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:34,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:34,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822126116] [2021-01-26 14:17:34,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:34,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:34,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:34,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:34,038 INFO L87 Difference]: Start difference. First operand 14422 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 14:17:34,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:34,586 INFO L93 Difference]: Finished difference Result 15094 states and 34908 transitions. [2021-01-26 14:17:34,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-26 14:17:34,587 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 14:17:34,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:34,603 INFO L225 Difference]: With dead ends: 15094 [2021-01-26 14:17:34,603 INFO L226 Difference]: Without dead ends: 14942 [2021-01-26 14:17:34,604 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:17:34,604 INFO L78 Accepts]: Start accepts. Automaton has 14942 states. Word has length 53 [2021-01-26 14:17:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:34,604 INFO L481 AbstractCegarLoop]: Abstraction has 14942 states. [2021-01-26 14:17:34,604 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 14:17:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 14942 states. [2021-01-26 14:17:34,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:34,617 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:34,618 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 14:17:34,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:34,832 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:34,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:34,833 INFO L82 PathProgramCache]: Analyzing trace with hash 601156231, now seen corresponding path program 12 times [2021-01-26 14:17:34,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:34,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043558275] [2021-01-26 14:17:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:34,965 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 14:17:34,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043558275] [2021-01-26 14:17:34,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288599007] [2021-01-26 14:17:34,966 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 14:17:35,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:17:35,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:35,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:35,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:35,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:35,351 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 14:17:35,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:35,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:35,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133887260] [2021-01-26 14:17:35,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:35,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:35,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:35,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:35,353 INFO L87 Difference]: Start difference. First operand 14942 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 14:17:36,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:36,099 INFO L93 Difference]: Finished difference Result 15294 states and 35308 transitions. [2021-01-26 14:17:36,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-26 14:17:36,100 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 14:17:36,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:36,118 INFO L225 Difference]: With dead ends: 15294 [2021-01-26 14:17:36,118 INFO L226 Difference]: Without dead ends: 15142 [2021-01-26 14:17:36,119 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2021-01-26 14:17:36,119 INFO L78 Accepts]: Start accepts. Automaton has 15142 states. Word has length 53 [2021-01-26 14:17:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:36,119 INFO L481 AbstractCegarLoop]: Abstraction has 15142 states. [2021-01-26 14:17:36,120 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 14:17:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 15142 states. [2021-01-26 14:17:36,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:36,134 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:36,134 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 14:17:36,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:36,345 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:36,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:36,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1971730201, now seen corresponding path program 13 times [2021-01-26 14:17:36,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:36,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616099958] [2021-01-26 14:17:36,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:36,489 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 14:17:36,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616099958] [2021-01-26 14:17:36,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944099593] [2021-01-26 14:17:36,490 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 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 14:17:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:36,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:36,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:36,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:36,796 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 14:17:36,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:36,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:36,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505086815] [2021-01-26 14:17:36,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:36,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:36,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:36,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:36,799 INFO L87 Difference]: Start difference. First operand 15142 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 14:17:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:37,694 INFO L93 Difference]: Finished difference Result 15614 states and 35948 transitions. [2021-01-26 14:17:37,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-26 14:17:37,695 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 14:17:37,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:37,711 INFO L225 Difference]: With dead ends: 15614 [2021-01-26 14:17:37,712 INFO L226 Difference]: Without dead ends: 15462 [2021-01-26 14:17:37,712 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-01-26 14:17:37,713 INFO L78 Accepts]: Start accepts. Automaton has 15462 states. Word has length 53 [2021-01-26 14:17:37,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:37,713 INFO L481 AbstractCegarLoop]: Abstraction has 15462 states. [2021-01-26 14:17:37,713 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 14:17:37,713 INFO L276 IsEmpty]: Start isEmpty. Operand 15462 states. [2021-01-26 14:17:37,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:37,725 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:37,725 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 14:17:37,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:37,927 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:37,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:37,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1215729429, now seen corresponding path program 14 times [2021-01-26 14:17:37,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:37,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606947979] [2021-01-26 14:17:37,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:38,076 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 14:17:38,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606947979] [2021-01-26 14:17:38,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229276035] [2021-01-26 14:17:38,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:17:38,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:38,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:38,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:38,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:38,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:38,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:38,561 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 14:17:38,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:38,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:38,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060918343] [2021-01-26 14:17:38,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:38,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:38,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:38,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:38,563 INFO L87 Difference]: Start difference. First operand 15462 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 14:17:39,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:39,913 INFO L93 Difference]: Finished difference Result 17226 states and 39746 transitions. [2021-01-26 14:17:39,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-26 14:17:39,914 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 14:17:39,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:39,934 INFO L225 Difference]: With dead ends: 17226 [2021-01-26 14:17:39,935 INFO L226 Difference]: Without dead ends: 16862 [2021-01-26 14:17:39,936 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=543, Invalid=1809, Unknown=0, NotChecked=0, Total=2352 [2021-01-26 14:17:39,936 INFO L78 Accepts]: Start accepts. Automaton has 16862 states. Word has length 53 [2021-01-26 14:17:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:39,936 INFO L481 AbstractCegarLoop]: Abstraction has 16862 states. [2021-01-26 14:17:39,936 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 14:17:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 16862 states. [2021-01-26 14:17:39,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:39,949 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:39,949 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 14:17:40,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-26 14:17:40,155 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:40,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:40,155 INFO L82 PathProgramCache]: Analyzing trace with hash 680245205, now seen corresponding path program 15 times [2021-01-26 14:17:40,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:40,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012759753] [2021-01-26 14:17:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:40,301 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 14:17:40,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012759753] [2021-01-26 14:17:40,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664528307] [2021-01-26 14:17:40,302 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 14:17:40,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:17:40,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:40,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:40,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:40,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:40,575 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 14:17:40,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:40,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:40,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038290018] [2021-01-26 14:17:40,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:40,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:40,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:40,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:40,576 INFO L87 Difference]: Start difference. First operand 16862 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 14:17:41,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:41,120 INFO L93 Difference]: Finished difference Result 17334 states and 39768 transitions. [2021-01-26 14:17:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-26 14:17:41,121 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 14:17:41,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:41,143 INFO L225 Difference]: With dead ends: 17334 [2021-01-26 14:17:41,143 INFO L226 Difference]: Without dead ends: 17182 [2021-01-26 14:17:41,144 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:17:41,144 INFO L78 Accepts]: Start accepts. Automaton has 17182 states. Word has length 53 [2021-01-26 14:17:41,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:41,144 INFO L481 AbstractCegarLoop]: Abstraction has 17182 states. [2021-01-26 14:17:41,144 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 14:17:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand 17182 states. [2021-01-26 14:17:41,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:41,157 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:41,157 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 14:17:41,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:41,358 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:41,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:41,359 INFO L82 PathProgramCache]: Analyzing trace with hash 409323335, now seen corresponding path program 16 times [2021-01-26 14:17:41,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:41,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371803657] [2021-01-26 14:17:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:41,506 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 14:17:41,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371803657] [2021-01-26 14:17:41,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800601265] [2021-01-26 14:17:41,507 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 14:17:41,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:17:41,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:41,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:17:41,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:41,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:41,732 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 14:17:41,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:41,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:41,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631000631] [2021-01-26 14:17:41,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:41,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:41,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:41,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:41,734 INFO L87 Difference]: Start difference. First operand 17182 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 14:17:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:42,514 INFO L93 Difference]: Finished difference Result 17614 states and 40328 transitions. [2021-01-26 14:17:42,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-26 14:17:42,519 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 14:17:42,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:42,543 INFO L225 Difference]: With dead ends: 17614 [2021-01-26 14:17:42,543 INFO L226 Difference]: Without dead ends: 17462 [2021-01-26 14:17:42,544 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=790, Unknown=0, NotChecked=0, Total=1056 [2021-01-26 14:17:42,544 INFO L78 Accepts]: Start accepts. Automaton has 17462 states. Word has length 53 [2021-01-26 14:17:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:42,544 INFO L481 AbstractCegarLoop]: Abstraction has 17462 states. [2021-01-26 14:17:42,544 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 14:17:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 17462 states. [2021-01-26 14:17:42,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:42,558 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:42,558 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 14:17:42,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-26 14:17:42,759 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:42,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:42,760 INFO L82 PathProgramCache]: Analyzing trace with hash -284076831, now seen corresponding path program 17 times [2021-01-26 14:17:42,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:42,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030223593] [2021-01-26 14:17:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:42,899 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 14:17:42,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030223593] [2021-01-26 14:17:42,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369920357] [2021-01-26 14:17:42,900 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 14:17:42,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:17:42,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:42,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:42,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:43,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:43,138 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 14:17:43,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:43,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:43,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120676278] [2021-01-26 14:17:43,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:43,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:43,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:43,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:43,141 INFO L87 Difference]: Start difference. First operand 17462 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 14:17:43,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:43,869 INFO L93 Difference]: Finished difference Result 18054 states and 41208 transitions. [2021-01-26 14:17:43,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-26 14:17:43,870 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 14:17:43,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:43,888 INFO L225 Difference]: With dead ends: 18054 [2021-01-26 14:17:43,888 INFO L226 Difference]: Without dead ends: 17902 [2021-01-26 14:17:43,889 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2021-01-26 14:17:43,889 INFO L78 Accepts]: Start accepts. Automaton has 17902 states. Word has length 53 [2021-01-26 14:17:43,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:43,889 INFO L481 AbstractCegarLoop]: Abstraction has 17902 states. [2021-01-26 14:17:43,889 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 14:17:43,889 INFO L276 IsEmpty]: Start isEmpty. Operand 17902 states. [2021-01-26 14:17:43,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:43,905 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:43,905 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 14:17:44,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:44,112 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:44,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:44,112 INFO L82 PathProgramCache]: Analyzing trace with hash -554998701, now seen corresponding path program 18 times [2021-01-26 14:17:44,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:44,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228038288] [2021-01-26 14:17:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:44,252 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 14:17:44,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228038288] [2021-01-26 14:17:44,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673305902] [2021-01-26 14:17:44,253 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 14:17:44,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:17:44,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:44,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:44,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:44,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:44,498 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 14:17:44,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:44,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:44,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57028613] [2021-01-26 14:17:44,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:44,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:44,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:44,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:44,499 INFO L87 Difference]: Start difference. First operand 17902 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 14:17:45,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:45,489 INFO L93 Difference]: Finished difference Result 18254 states and 41608 transitions. [2021-01-26 14:17:45,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-26 14:17:45,490 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 14:17:45,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:45,508 INFO L225 Difference]: With dead ends: 18254 [2021-01-26 14:17:45,508 INFO L226 Difference]: Without dead ends: 18102 [2021-01-26 14:17:45,509 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2021-01-26 14:17:45,509 INFO L78 Accepts]: Start accepts. Automaton has 18102 states. Word has length 53 [2021-01-26 14:17:45,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:45,509 INFO L481 AbstractCegarLoop]: Abstraction has 18102 states. [2021-01-26 14:17:45,509 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 14:17:45,509 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states. [2021-01-26 14:17:45,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:45,519 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:45,519 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 14:17:45,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-26 14:17:45,720 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:45,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:45,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2036829567, now seen corresponding path program 19 times [2021-01-26 14:17:45,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:45,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182659095] [2021-01-26 14:17:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:45,843 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 14:17:45,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182659095] [2021-01-26 14:17:45,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281394061] [2021-01-26 14:17:45,844 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 14:17:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:45,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:45,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:46,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:46,082 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 14:17:46,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:46,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:46,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444690343] [2021-01-26 14:17:46,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:46,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:46,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:46,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:46,084 INFO L87 Difference]: Start difference. First operand 18102 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 14:17:46,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:46,950 INFO L93 Difference]: Finished difference Result 18414 states and 41928 transitions. [2021-01-26 14:17:46,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-26 14:17:46,950 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 14:17:46,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:46,971 INFO L225 Difference]: With dead ends: 18414 [2021-01-26 14:17:46,971 INFO L226 Difference]: Without dead ends: 18262 [2021-01-26 14:17:46,971 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2021-01-26 14:17:46,972 INFO L78 Accepts]: Start accepts. Automaton has 18262 states. Word has length 53 [2021-01-26 14:17:46,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:46,972 INFO L481 AbstractCegarLoop]: Abstraction has 18262 states. [2021-01-26 14:17:46,972 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 14:17:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 18262 states. [2021-01-26 14:17:46,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:46,983 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:46,984 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 14:17:47,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:47,199 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:47,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:47,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1606714029, now seen corresponding path program 20 times [2021-01-26 14:17:47,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:47,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372049206] [2021-01-26 14:17:47,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:47,324 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 14:17:47,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372049206] [2021-01-26 14:17:47,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570267117] [2021-01-26 14:17:47,326 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 14:17:47,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:47,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:47,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:47,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:47,576 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:47,583 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 14:17:47,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:47,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:47,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172629076] [2021-01-26 14:17:47,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:47,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:47,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:47,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:47,585 INFO L87 Difference]: Start difference. First operand 18262 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 14:17:48,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:48,436 INFO L93 Difference]: Finished difference Result 18984 states and 43353 transitions. [2021-01-26 14:17:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-26 14:17:48,437 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 14:17:48,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:48,458 INFO L225 Difference]: With dead ends: 18984 [2021-01-26 14:17:48,458 INFO L226 Difference]: Without dead ends: 18832 [2021-01-26 14:17:48,458 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2021-01-26 14:17:48,459 INFO L78 Accepts]: Start accepts. Automaton has 18832 states. Word has length 53 [2021-01-26 14:17:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:48,459 INFO L481 AbstractCegarLoop]: Abstraction has 18832 states. [2021-01-26 14:17:48,459 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 14:17:48,459 INFO L276 IsEmpty]: Start isEmpty. Operand 18832 states. [2021-01-26 14:17:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:48,473 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:48,473 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 14:17:48,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-26 14:17:48,674 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:48,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:48,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1932252495, now seen corresponding path program 21 times [2021-01-26 14:17:48,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:48,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362292180] [2021-01-26 14:17:48,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:49,002 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 14:17:49,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362292180] [2021-01-26 14:17:49,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495775953] [2021-01-26 14:17:49,003 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 14:17:49,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:17:49,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:49,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:49,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:49,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:49,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:49,277 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 14:17:49,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:49,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:49,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706287490] [2021-01-26 14:17:49,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:49,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:49,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:49,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:49,279 INFO L87 Difference]: Start difference. First operand 18832 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 14:17:50,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:50,760 INFO L93 Difference]: Finished difference Result 21566 states and 49188 transitions. [2021-01-26 14:17:50,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-26 14:17:50,761 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 14:17:50,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:50,785 INFO L225 Difference]: With dead ends: 21566 [2021-01-26 14:17:50,786 INFO L226 Difference]: Without dead ends: 21032 [2021-01-26 14:17:50,787 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=656, Invalid=2314, Unknown=0, NotChecked=0, Total=2970 [2021-01-26 14:17:50,787 INFO L78 Accepts]: Start accepts. Automaton has 21032 states. Word has length 53 [2021-01-26 14:17:50,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:50,787 INFO L481 AbstractCegarLoop]: Abstraction has 21032 states. [2021-01-26 14:17:50,787 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 14:17:50,787 INFO L276 IsEmpty]: Start isEmpty. Operand 21032 states. [2021-01-26 14:17:50,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:50,804 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:50,804 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 14:17:51,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-26 14:17:51,006 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:51,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:51,007 INFO L82 PathProgramCache]: Analyzing trace with hash 75989787, now seen corresponding path program 22 times [2021-01-26 14:17:51,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:51,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335495098] [2021-01-26 14:17:51,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:51,179 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 14:17:51,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335495098] [2021-01-26 14:17:51,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648707188] [2021-01-26 14:17:51,179 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 14:17:51,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:17:51,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:51,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:17:51,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:51,427 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:51,437 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 14:17:51,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:51,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:51,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539040499] [2021-01-26 14:17:51,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:51,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:51,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:51,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:51,439 INFO L87 Difference]: Start difference. First operand 21032 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 14:17:52,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:52,623 INFO L93 Difference]: Finished difference Result 21584 states and 48933 transitions. [2021-01-26 14:17:52,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-26 14:17:52,624 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 14:17:52,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:52,646 INFO L225 Difference]: With dead ends: 21584 [2021-01-26 14:17:52,646 INFO L226 Difference]: Without dead ends: 21432 [2021-01-26 14:17:52,647 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=492, Invalid=1578, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:17:52,647 INFO L78 Accepts]: Start accepts. Automaton has 21432 states. Word has length 53 [2021-01-26 14:17:52,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:52,647 INFO L481 AbstractCegarLoop]: Abstraction has 21432 states. [2021-01-26 14:17:52,647 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 14:17:52,647 INFO L276 IsEmpty]: Start isEmpty. Operand 21432 states. [2021-01-26 14:17:52,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:52,664 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:52,664 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 14:17:52,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-26 14:17:52,865 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:52,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:52,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1798070651, now seen corresponding path program 23 times [2021-01-26 14:17:52,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:52,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234170373] [2021-01-26 14:17:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:53,125 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 14:17:53,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234170373] [2021-01-26 14:17:53,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027097371] [2021-01-26 14:17:53,126 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 14:17:53,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:17:53,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:53,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:53,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:53,357 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:53,366 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 14:17:53,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:53,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:53,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25111242] [2021-01-26 14:17:53,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:53,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:53,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:53,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:53,367 INFO L87 Difference]: Start difference. First operand 21432 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 14:17:54,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:54,484 INFO L93 Difference]: Finished difference Result 22534 states and 50928 transitions. [2021-01-26 14:17:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-26 14:17:54,485 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 14:17:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:54,508 INFO L225 Difference]: With dead ends: 22534 [2021-01-26 14:17:54,509 INFO L226 Difference]: Without dead ends: 22382 [2021-01-26 14:17:54,509 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-01-26 14:17:54,509 INFO L78 Accepts]: Start accepts. Automaton has 22382 states. Word has length 53 [2021-01-26 14:17:54,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:54,510 INFO L481 AbstractCegarLoop]: Abstraction has 22382 states. [2021-01-26 14:17:54,510 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 14:17:54,510 INFO L276 IsEmpty]: Start isEmpty. Operand 22382 states. [2021-01-26 14:17:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:54,523 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:54,523 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 14:17:54,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-26 14:17:54,724 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:54,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:54,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1740895873, now seen corresponding path program 24 times [2021-01-26 14:17:54,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:54,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071348472] [2021-01-26 14:17:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:54,868 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 14:17:54,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071348472] [2021-01-26 14:17:54,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007905347] [2021-01-26 14:17:54,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:17:54,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:17:54,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:54,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:54,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:55,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:55,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:55,176 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 14:17:55,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:55,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:55,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808812644] [2021-01-26 14:17:55,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:55,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:55,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:55,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:55,178 INFO L87 Difference]: Start difference. First operand 22382 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 14:17:57,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:57,060 INFO L93 Difference]: Finished difference Result 26056 states and 59213 transitions. [2021-01-26 14:17:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-26 14:17:57,062 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 14:17:57,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:57,105 INFO L225 Difference]: With dead ends: 26056 [2021-01-26 14:17:57,105 INFO L226 Difference]: Without dead ends: 25522 [2021-01-26 14:17:57,107 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=756, Invalid=2550, Unknown=0, NotChecked=0, Total=3306 [2021-01-26 14:17:57,107 INFO L78 Accepts]: Start accepts. Automaton has 25522 states. Word has length 53 [2021-01-26 14:17:57,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:57,107 INFO L481 AbstractCegarLoop]: Abstraction has 25522 states. [2021-01-26 14:17:57,107 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 14:17:57,108 INFO L276 IsEmpty]: Start isEmpty. Operand 25522 states. [2021-01-26 14:17:57,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:57,128 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:57,128 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 14:17:57,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:57,342 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:57,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:57,342 INFO L82 PathProgramCache]: Analyzing trace with hash 499168331, now seen corresponding path program 25 times [2021-01-26 14:17:57,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:57,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303331541] [2021-01-26 14:17:57,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:57,487 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 14:17:57,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303331541] [2021-01-26 14:17:57,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627628561] [2021-01-26 14:17:57,487 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 14:17:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:57,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:57,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:57,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:57,714 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 14:17:57,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:57,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:57,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592392764] [2021-01-26 14:17:57,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:57,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:57,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:57,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:57,716 INFO L87 Difference]: Start difference. First operand 25522 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 14:17:58,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:58,150 INFO L93 Difference]: Finished difference Result 26674 states and 60158 transitions. [2021-01-26 14:17:58,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-26 14:17:58,151 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 14:17:58,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:58,180 INFO L225 Difference]: With dead ends: 26674 [2021-01-26 14:17:58,181 INFO L226 Difference]: Without dead ends: 26522 [2021-01-26 14:17:58,181 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-01-26 14:17:58,181 INFO L78 Accepts]: Start accepts. Automaton has 26522 states. Word has length 53 [2021-01-26 14:17:58,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:58,182 INFO L481 AbstractCegarLoop]: Abstraction has 26522 states. [2021-01-26 14:17:58,182 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 14:17:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 26522 states. [2021-01-26 14:17:58,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:58,198 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:58,198 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 14:17:58,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-26 14:17:58,400 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:58,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:58,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1299793979, now seen corresponding path program 26 times [2021-01-26 14:17:58,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:58,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302254356] [2021-01-26 14:17:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:58,542 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 14:17:58,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302254356] [2021-01-26 14:17:58,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319042054] [2021-01-26 14:17:58,543 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 14:17:58,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:58,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:58,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:58,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:58,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:58,771 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 14:17:58,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:58,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:58,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079894747] [2021-01-26 14:17:58,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:58,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:58,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:58,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:58,772 INFO L87 Difference]: Start difference. First operand 26522 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 14:17:59,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:59,236 INFO L93 Difference]: Finished difference Result 26874 states and 60558 transitions. [2021-01-26 14:17:59,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-26 14:17:59,237 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 14:17:59,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:59,266 INFO L225 Difference]: With dead ends: 26874 [2021-01-26 14:17:59,266 INFO L226 Difference]: Without dead ends: 26722 [2021-01-26 14:17:59,267 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-01-26 14:17:59,267 INFO L78 Accepts]: Start accepts. Automaton has 26722 states. Word has length 53 [2021-01-26 14:17:59,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:59,267 INFO L481 AbstractCegarLoop]: Abstraction has 26722 states. [2021-01-26 14:17:59,267 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 14:17:59,267 INFO L276 IsEmpty]: Start isEmpty. Operand 26722 states. [2021-01-26 14:17:59,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:59,283 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:59,283 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 14:17:59,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-26 14:17:59,499 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:59,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:59,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1615896897, now seen corresponding path program 27 times [2021-01-26 14:17:59,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:59,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200496846] [2021-01-26 14:17:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:59,622 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 14:17:59,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200496846] [2021-01-26 14:17:59,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147650147] [2021-01-26 14:17:59,622 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 14:17:59,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-26 14:17:59,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:59,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:59,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:59,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:59,854 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 14:18:00,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:00,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:00,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366731431] [2021-01-26 14:18:00,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:00,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:00,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:00,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:00,046 INFO L87 Difference]: Start difference. First operand 26722 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 14:18:00,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:00,564 INFO L93 Difference]: Finished difference Result 27474 states and 61758 transitions. [2021-01-26 14:18:00,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-26 14:18:00,565 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 14:18:00,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:00,597 INFO L225 Difference]: With dead ends: 27474 [2021-01-26 14:18:00,597 INFO L226 Difference]: Without dead ends: 27322 [2021-01-26 14:18:00,598 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2021-01-26 14:18:00,598 INFO L78 Accepts]: Start accepts. Automaton has 27322 states. Word has length 53 [2021-01-26 14:18:00,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:00,598 INFO L481 AbstractCegarLoop]: Abstraction has 27322 states. [2021-01-26 14:18:00,598 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 14:18:00,598 INFO L276 IsEmpty]: Start isEmpty. Operand 27322 states. [2021-01-26 14:18:00,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:00,613 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:00,614 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 14:18:00,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:00,814 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:00,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:00,815 INFO L82 PathProgramCache]: Analyzing trace with hash 880108089, now seen corresponding path program 28 times [2021-01-26 14:18:00,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:00,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378050255] [2021-01-26 14:18:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:00,935 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 14:18:00,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378050255] [2021-01-26 14:18:00,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765434178] [2021-01-26 14:18:00,936 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 14:18:00,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:18:00,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:00,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:00,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:01,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:01,140 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 14:18:01,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:01,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:01,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357153312] [2021-01-26 14:18:01,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:01,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:01,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:01,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:01,142 INFO L87 Difference]: Start difference. First operand 27322 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 14:18:01,495 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2021-01-26 14:18:01,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:01,894 INFO L93 Difference]: Finished difference Result 27674 states and 62158 transitions. [2021-01-26 14:18:01,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-26 14:18:01,895 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 14:18:01,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:01,928 INFO L225 Difference]: With dead ends: 27674 [2021-01-26 14:18:01,928 INFO L226 Difference]: Without dead ends: 27522 [2021-01-26 14:18:01,929 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:18:01,929 INFO L78 Accepts]: Start accepts. Automaton has 27522 states. Word has length 53 [2021-01-26 14:18:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:01,929 INFO L481 AbstractCegarLoop]: Abstraction has 27522 states. [2021-01-26 14:18:01,929 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 14:18:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 27522 states. [2021-01-26 14:18:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:01,950 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:01,950 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 14:18:02,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-26 14:18:02,151 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:02,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:02,152 INFO L82 PathProgramCache]: Analyzing trace with hash 840549663, now seen corresponding path program 29 times [2021-01-26 14:18:02,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:02,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671977385] [2021-01-26 14:18:02,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:02,290 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 14:18:02,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671977385] [2021-01-26 14:18:02,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156241189] [2021-01-26 14:18:02,291 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 14:18:02,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:02,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:02,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:02,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:02,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:02,557 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 14:18:02,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:02,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:02,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711238667] [2021-01-26 14:18:02,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:02,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:02,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:02,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:02,559 INFO L87 Difference]: Start difference. First operand 27522 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 14:18:03,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:03,163 INFO L93 Difference]: Finished difference Result 27794 states and 62398 transitions. [2021-01-26 14:18:03,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:18:03,163 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 14:18:03,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:03,197 INFO L225 Difference]: With dead ends: 27794 [2021-01-26 14:18:03,197 INFO L226 Difference]: Without dead ends: 27642 [2021-01-26 14:18:03,197 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-01-26 14:18:03,197 INFO L78 Accepts]: Start accepts. Automaton has 27642 states. Word has length 53 [2021-01-26 14:18:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:03,198 INFO L481 AbstractCegarLoop]: Abstraction has 27642 states. [2021-01-26 14:18:03,198 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 14:18:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 27642 states. [2021-01-26 14:18:03,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:03,219 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:03,219 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 14:18:03,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:03,420 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:03,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:03,421 INFO L82 PathProgramCache]: Analyzing trace with hash -958412647, now seen corresponding path program 30 times [2021-01-26 14:18:03,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:03,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310156306] [2021-01-26 14:18:03,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:03,571 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 14:18:03,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310156306] [2021-01-26 14:18:03,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445812980] [2021-01-26 14:18:03,572 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 14:18:03,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-26 14:18:03,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:03,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:03,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:03,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:03,953 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 14:18:03,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:03,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:03,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525284783] [2021-01-26 14:18:03,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:03,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:03,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:03,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:03,955 INFO L87 Difference]: Start difference. First operand 27642 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 14:18:04,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:04,646 INFO L93 Difference]: Finished difference Result 27874 states and 62558 transitions. [2021-01-26 14:18:04,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-26 14:18:04,646 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 14:18:04,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:04,677 INFO L225 Difference]: With dead ends: 27874 [2021-01-26 14:18:04,677 INFO L226 Difference]: Without dead ends: 27722 [2021-01-26 14:18:04,678 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:18:04,678 INFO L78 Accepts]: Start accepts. Automaton has 27722 states. Word has length 53 [2021-01-26 14:18:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:04,678 INFO L481 AbstractCegarLoop]: Abstraction has 27722 states. [2021-01-26 14:18:04,679 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 14:18:04,679 INFO L276 IsEmpty]: Start isEmpty. Operand 27722 states. [2021-01-26 14:18:04,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:04,695 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:04,696 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 14:18:04,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-26 14:18:04,896 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash -854790029, now seen corresponding path program 31 times [2021-01-26 14:18:04,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:04,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066374703] [2021-01-26 14:18:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:05,023 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 14:18:05,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066374703] [2021-01-26 14:18:05,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135865577] [2021-01-26 14:18:05,023 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 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 14:18:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:05,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:05,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:05,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:05,287 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 14:18:05,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:05,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:05,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57637799] [2021-01-26 14:18:05,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:05,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:05,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:05,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:05,290 INFO L87 Difference]: Start difference. First operand 27722 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 14:18:05,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:05,934 INFO L93 Difference]: Finished difference Result 27994 states and 62798 transitions. [2021-01-26 14:18:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-26 14:18:05,935 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 14:18:05,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:05,965 INFO L225 Difference]: With dead ends: 27994 [2021-01-26 14:18:05,965 INFO L226 Difference]: Without dead ends: 27842 [2021-01-26 14:18:05,966 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-01-26 14:18:05,966 INFO L78 Accepts]: Start accepts. Automaton has 27842 states. Word has length 53 [2021-01-26 14:18:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:05,966 INFO L481 AbstractCegarLoop]: Abstraction has 27842 states. [2021-01-26 14:18:05,966 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 14:18:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 27842 states. [2021-01-26 14:18:05,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:05,982 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:05,982 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 14:18:06,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-26 14:18:06,194 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:06,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:06,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1725522547, now seen corresponding path program 32 times [2021-01-26 14:18:06,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:06,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197384138] [2021-01-26 14:18:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:06,331 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 14:18:06,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197384138] [2021-01-26 14:18:06,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259045205] [2021-01-26 14:18:06,332 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 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 14:18:06,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:06,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:06,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:06,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:06,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:06,574 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 14:18:06,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:06,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:06,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329697705] [2021-01-26 14:18:06,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:06,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:06,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:06,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:06,576 INFO L87 Difference]: Start difference. First operand 27842 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 14:18:07,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:07,368 INFO L93 Difference]: Finished difference Result 28194 states and 63198 transitions. [2021-01-26 14:18:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-26 14:18:07,369 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 14:18:07,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:07,400 INFO L225 Difference]: With dead ends: 28194 [2021-01-26 14:18:07,400 INFO L226 Difference]: Without dead ends: 28042 [2021-01-26 14:18:07,400 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-01-26 14:18:07,401 INFO L78 Accepts]: Start accepts. Automaton has 28042 states. Word has length 53 [2021-01-26 14:18:07,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:07,401 INFO L481 AbstractCegarLoop]: Abstraction has 28042 states. [2021-01-26 14:18:07,401 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 14:18:07,401 INFO L276 IsEmpty]: Start isEmpty. Operand 28042 states. [2021-01-26 14:18:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:07,418 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:07,418 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 14:18:07,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-26 14:18:07,618 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:07,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:07,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2141327283, now seen corresponding path program 33 times [2021-01-26 14:18:07,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:07,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204998060] [2021-01-26 14:18:07,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:07,750 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 14:18:07,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204998060] [2021-01-26 14:18:07,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036171047] [2021-01-26 14:18:07,751 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 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 14:18:07,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-26 14:18:07,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:07,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:07,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:07,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:08,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:08,022 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 14:18:08,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:08,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:08,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240296230] [2021-01-26 14:18:08,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:08,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:08,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:08,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:08,025 INFO L87 Difference]: Start difference. First operand 28042 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 14:18:09,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:09,445 INFO L93 Difference]: Finished difference Result 30266 states and 68106 transitions. [2021-01-26 14:18:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-26 14:18:09,446 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 14:18:09,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:09,482 INFO L225 Difference]: With dead ends: 30266 [2021-01-26 14:18:09,482 INFO L226 Difference]: Without dead ends: 29902 [2021-01-26 14:18:09,483 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=576, Invalid=1974, Unknown=0, NotChecked=0, Total=2550 [2021-01-26 14:18:09,483 INFO L78 Accepts]: Start accepts. Automaton has 29902 states. Word has length 53 [2021-01-26 14:18:09,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:09,483 INFO L481 AbstractCegarLoop]: Abstraction has 29902 states. [2021-01-26 14:18:09,483 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 14:18:09,483 INFO L276 IsEmpty]: Start isEmpty. Operand 29902 states. [2021-01-26 14:18:09,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:09,503 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:09,503 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 14:18:09,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-01-26 14:18:09,705 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:09,705 INFO L82 PathProgramCache]: Analyzing trace with hash -270011115, now seen corresponding path program 34 times [2021-01-26 14:18:09,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:09,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937705169] [2021-01-26 14:18:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:09,855 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 14:18:09,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937705169] [2021-01-26 14:18:09,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930015043] [2021-01-26 14:18:09,856 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 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 14:18:09,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:18:09,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:09,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:18:09,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:10,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:10,115 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 14:18:10,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:10,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:10,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472349611] [2021-01-26 14:18:10,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:10,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:10,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:10,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:10,117 INFO L87 Difference]: Start difference. First operand 29902 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 14:18:11,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:11,050 INFO L93 Difference]: Finished difference Result 30174 states and 67728 transitions. [2021-01-26 14:18:11,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-26 14:18:11,051 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 14:18:11,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:11,083 INFO L225 Difference]: With dead ends: 30174 [2021-01-26 14:18:11,083 INFO L226 Difference]: Without dead ends: 30022 [2021-01-26 14:18:11,084 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-01-26 14:18:11,084 INFO L78 Accepts]: Start accepts. Automaton has 30022 states. Word has length 53 [2021-01-26 14:18:11,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:11,084 INFO L481 AbstractCegarLoop]: Abstraction has 30022 states. [2021-01-26 14:18:11,084 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 14:18:11,084 INFO L276 IsEmpty]: Start isEmpty. Operand 30022 states. [2021-01-26 14:18:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:11,100 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:11,100 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 14:18:11,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:11,301 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:11,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:11,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1452069749, now seen corresponding path program 35 times [2021-01-26 14:18:11,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:11,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019219133] [2021-01-26 14:18:11,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:11,429 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 14:18:11,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019219133] [2021-01-26 14:18:11,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107902167] [2021-01-26 14:18:11,430 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 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 14:18:11,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:11,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:11,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:11,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:11,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:11,632 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 14:18:11,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:11,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:11,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336238480] [2021-01-26 14:18:11,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:11,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:11,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:11,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:11,634 INFO L87 Difference]: Start difference. First operand 30022 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 14:18:12,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:12,431 INFO L93 Difference]: Finished difference Result 30214 states and 67808 transitions. [2021-01-26 14:18:12,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-26 14:18:12,432 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 14:18:12,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:12,470 INFO L225 Difference]: With dead ends: 30214 [2021-01-26 14:18:12,470 INFO L226 Difference]: Without dead ends: 30062 [2021-01-26 14:18:12,471 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2021-01-26 14:18:12,471 INFO L78 Accepts]: Start accepts. Automaton has 30062 states. Word has length 53 [2021-01-26 14:18:12,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:12,471 INFO L481 AbstractCegarLoop]: Abstraction has 30062 states. [2021-01-26 14:18:12,471 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 14:18:12,471 INFO L276 IsEmpty]: Start isEmpty. Operand 30062 states. [2021-01-26 14:18:12,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:12,491 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:12,492 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 14:18:12,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-26 14:18:12,693 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:12,693 INFO L82 PathProgramCache]: Analyzing trace with hash -2086896775, now seen corresponding path program 36 times [2021-01-26 14:18:12,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:12,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595388074] [2021-01-26 14:18:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:12,967 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 14:18:12,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595388074] [2021-01-26 14:18:12,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388180726] [2021-01-26 14:18:12,968 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 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 14:18:13,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-26 14:18:13,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:13,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:13,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:13,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:13,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:13,173 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 14:18:13,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:13,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:13,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787360133] [2021-01-26 14:18:13,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:13,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:13,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:13,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:13,175 INFO L87 Difference]: Start difference. First operand 30062 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 14:18:14,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:14,429 INFO L93 Difference]: Finished difference Result 31636 states and 71131 transitions. [2021-01-26 14:18:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-26 14:18:14,430 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 14:18:14,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:14,467 INFO L225 Difference]: With dead ends: 31636 [2021-01-26 14:18:14,467 INFO L226 Difference]: Without dead ends: 31272 [2021-01-26 14:18:14,467 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2021-01-26 14:18:14,467 INFO L78 Accepts]: Start accepts. Automaton has 31272 states. Word has length 53 [2021-01-26 14:18:14,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:14,468 INFO L481 AbstractCegarLoop]: Abstraction has 31272 states. [2021-01-26 14:18:14,468 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 14:18:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand 31272 states. [2021-01-26 14:18:14,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:14,491 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:14,491 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 14:18:14,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:14,692 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:14,693 INFO L82 PathProgramCache]: Analyzing trace with hash -2038569245, now seen corresponding path program 3 times [2021-01-26 14:18:14,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:14,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76765742] [2021-01-26 14:18:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:15,001 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 14:18:15,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76765742] [2021-01-26 14:18:15,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493294273] [2021-01-26 14:18:15,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:15,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-26 14:18:15,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:15,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:15,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:15,239 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:15,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:15,276 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 14:18:15,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:15,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:15,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692358003] [2021-01-26 14:18:15,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:15,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:15,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:15,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:15,279 INFO L87 Difference]: Start difference. First operand 31272 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 14:18:15,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:15,793 INFO L93 Difference]: Finished difference Result 32504 states and 73057 transitions. [2021-01-26 14:18:15,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-26 14:18:15,794 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 14:18:15,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:15,830 INFO L225 Difference]: With dead ends: 32504 [2021-01-26 14:18:15,831 INFO L226 Difference]: Without dead ends: 32140 [2021-01-26 14:18:15,831 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 14:18:15,831 INFO L78 Accepts]: Start accepts. Automaton has 32140 states. Word has length 58 [2021-01-26 14:18:15,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:15,831 INFO L481 AbstractCegarLoop]: Abstraction has 32140 states. [2021-01-26 14:18:15,831 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 14:18:15,832 INFO L276 IsEmpty]: Start isEmpty. Operand 32140 states. [2021-01-26 14:18:15,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:15,855 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:15,855 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 14:18:16,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-26 14:18:16,056 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:16,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:16,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1808185776, now seen corresponding path program 7 times [2021-01-26 14:18:16,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:16,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860226689] [2021-01-26 14:18:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:16,228 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 14:18:16,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860226689] [2021-01-26 14:18:16,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939752454] [2021-01-26 14:18:16,232 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 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 14:18:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:16,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:16,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:16,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:16,573 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 14:18:16,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:16,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:16,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678634338] [2021-01-26 14:18:16,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:16,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:16,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:16,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:16,577 INFO L87 Difference]: Start difference. First operand 32140 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 14:18:17,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:17,326 INFO L93 Difference]: Finished difference Result 32332 states and 72519 transitions. [2021-01-26 14:18:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-26 14:18:17,327 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 14:18:17,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:17,382 INFO L225 Difference]: With dead ends: 32332 [2021-01-26 14:18:17,382 INFO L226 Difference]: Without dead ends: 32180 [2021-01-26 14:18:17,383 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-01-26 14:18:17,383 INFO L78 Accepts]: Start accepts. Automaton has 32180 states. Word has length 58 [2021-01-26 14:18:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:17,383 INFO L481 AbstractCegarLoop]: Abstraction has 32180 states. [2021-01-26 14:18:17,383 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 14:18:17,384 INFO L276 IsEmpty]: Start isEmpty. Operand 32180 states. [2021-01-26 14:18:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:17,427 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:17,427 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 14:18:17,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-26 14:18:17,641 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:17,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:17,641 INFO L82 PathProgramCache]: Analyzing trace with hash 804219266, now seen corresponding path program 8 times [2021-01-26 14:18:17,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:17,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133449475] [2021-01-26 14:18:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:17,833 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 14:18:17,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133449475] [2021-01-26 14:18:17,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178116636] [2021-01-26 14:18:17,833 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 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 14:18:17,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:17,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:17,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:18:17,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:17,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:18,000 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 14:18:18,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:18,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-01-26 14:18:18,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499145127] [2021-01-26 14:18:18,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:18:18,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:18,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:18:18,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:18:18,002 INFO L87 Difference]: Start difference. First operand 32180 states. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:18,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:18,882 INFO L93 Difference]: Finished difference Result 33460 states and 75287 transitions. [2021-01-26 14:18:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-26 14:18:18,883 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:18,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:18,918 INFO L225 Difference]: With dead ends: 33460 [2021-01-26 14:18:18,918 INFO L226 Difference]: Without dead ends: 32920 [2021-01-26 14:18:18,919 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2021-01-26 14:18:18,919 INFO L78 Accepts]: Start accepts. Automaton has 32920 states. Word has length 58 [2021-01-26 14:18:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:18,919 INFO L481 AbstractCegarLoop]: Abstraction has 32920 states. [2021-01-26 14:18:18,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:18,919 INFO L276 IsEmpty]: Start isEmpty. Operand 32920 states. [2021-01-26 14:18:18,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:18,940 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:18,941 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 14:18:19,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:19,141 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:19,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:19,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1992619272, now seen corresponding path program 37 times [2021-01-26 14:18:19,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:19,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317454779] [2021-01-26 14:18:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:19,306 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 14:18:19,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317454779] [2021-01-26 14:18:19,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884904215] [2021-01-26 14:18:19,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:18:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:19,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:19,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:19,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:19,699 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 14:18:19,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:19,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:19,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364170098] [2021-01-26 14:18:19,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:19,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:19,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:19,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:19,702 INFO L87 Difference]: Start difference. First operand 32920 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 14:18:22,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:22,040 INFO L93 Difference]: Finished difference Result 33360 states and 74829 transitions. [2021-01-26 14:18:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-26 14:18:22,041 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 14:18:22,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:22,080 INFO L225 Difference]: With dead ends: 33360 [2021-01-26 14:18:22,080 INFO L226 Difference]: Without dead ends: 33120 [2021-01-26 14:18:22,080 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2021-01-26 14:18:22,080 INFO L78 Accepts]: Start accepts. Automaton has 33120 states. Word has length 58 [2021-01-26 14:18:22,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:22,081 INFO L481 AbstractCegarLoop]: Abstraction has 33120 states. [2021-01-26 14:18:22,081 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 14:18:22,081 INFO L276 IsEmpty]: Start isEmpty. Operand 33120 states. [2021-01-26 14:18:22,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:22,104 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:22,104 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 14:18:22,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-26 14:18:22,305 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:22,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:22,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1033008748, now seen corresponding path program 38 times [2021-01-26 14:18:22,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:22,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413410977] [2021-01-26 14:18:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:22,503 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 14:18:22,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413410977] [2021-01-26 14:18:22,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632107571] [2021-01-26 14:18:22,504 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 14:18:22,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:22,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:22,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:22,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:22,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:22,921 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 14:18:22,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:22,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:22,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226586055] [2021-01-26 14:18:22,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:22,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:22,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:22,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:22,927 INFO L87 Difference]: Start difference. First operand 33120 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 14:18:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:27,094 INFO L93 Difference]: Finished difference Result 33560 states and 75229 transitions. [2021-01-26 14:18:27,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-26 14:18:27,095 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 14:18:27,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:27,132 INFO L225 Difference]: With dead ends: 33560 [2021-01-26 14:18:27,132 INFO L226 Difference]: Without dead ends: 33320 [2021-01-26 14:18:27,132 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=354, Invalid=1368, Unknown=0, NotChecked=0, Total=1722 [2021-01-26 14:18:27,132 INFO L78 Accepts]: Start accepts. Automaton has 33320 states. Word has length 58 [2021-01-26 14:18:27,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:27,133 INFO L481 AbstractCegarLoop]: Abstraction has 33320 states. [2021-01-26 14:18:27,133 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 14:18:27,133 INFO L276 IsEmpty]: Start isEmpty. Operand 33320 states. [2021-01-26 14:18:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:27,156 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:27,156 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 14:18:27,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-26 14:18:27,357 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:27,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:27,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1539877684, now seen corresponding path program 39 times [2021-01-26 14:18:27,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:27,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137537665] [2021-01-26 14:18:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:27,511 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 14:18:27,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137537665] [2021-01-26 14:18:27,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674142894] [2021-01-26 14:18:27,512 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 14:18:27,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-26 14:18:27,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:27,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-26 14:18:27,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:27,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:27,747 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 14:18:27,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:27,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-01-26 14:18:27,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002115152] [2021-01-26 14:18:27,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:27,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:27,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:27,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:27,749 INFO L87 Difference]: Start difference. First operand 33320 states. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:28,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:28,911 INFO L93 Difference]: Finished difference Result 33512 states and 75069 transitions. [2021-01-26 14:18:28,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-26 14:18:28,912 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:28,949 INFO L225 Difference]: With dead ends: 33512 [2021-01-26 14:18:28,949 INFO L226 Difference]: Without dead ends: 33360 [2021-01-26 14:18:28,950 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=350, Invalid=1210, Unknown=0, NotChecked=0, Total=1560 [2021-01-26 14:18:28,950 INFO L78 Accepts]: Start accepts. Automaton has 33360 states. Word has length 58 [2021-01-26 14:18:28,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:28,950 INFO L481 AbstractCegarLoop]: Abstraction has 33360 states. [2021-01-26 14:18:28,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:28,950 INFO L276 IsEmpty]: Start isEmpty. Operand 33360 states. [2021-01-26 14:18:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:28,978 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:28,978 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 14:18:29,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-26 14:18:29,187 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:29,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:29,187 INFO L82 PathProgramCache]: Analyzing trace with hash -783876912, now seen corresponding path program 40 times [2021-01-26 14:18:29,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:29,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020604394] [2021-01-26 14:18:29,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:29,381 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 14:18:29,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020604394] [2021-01-26 14:18:29,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56665943] [2021-01-26 14:18:29,382 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 14:18:29,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:18:29,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:29,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:18:29,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:29,698 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:29,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:29,789 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 14:18:29,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:29,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:29,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134167706] [2021-01-26 14:18:29,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:29,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:29,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:29,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:29,792 INFO L87 Difference]: Start difference. First operand 33360 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 14:18:31,228 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2021-01-26 14:18:31,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:31,618 INFO L93 Difference]: Finished difference Result 34624 states and 77677 transitions. [2021-01-26 14:18:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-26 14:18:31,619 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 14:18:31,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:31,665 INFO L225 Difference]: With dead ends: 34624 [2021-01-26 14:18:31,666 INFO L226 Difference]: Without dead ends: 34260 [2021-01-26 14:18:31,666 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=623, Invalid=2133, Unknown=0, NotChecked=0, Total=2756 [2021-01-26 14:18:31,666 INFO L78 Accepts]: Start accepts. Automaton has 34260 states. Word has length 58 [2021-01-26 14:18:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:31,666 INFO L481 AbstractCegarLoop]: Abstraction has 34260 states. [2021-01-26 14:18:31,666 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 14:18:31,667 INFO L276 IsEmpty]: Start isEmpty. Operand 34260 states. [2021-01-26 14:18:31,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:31,698 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:31,698 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 14:18:31,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:31,899 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:31,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:31,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1112097722, now seen corresponding path program 41 times [2021-01-26 14:18:31,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:31,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937824549] [2021-01-26 14:18:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:32,071 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 14:18:32,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937824549] [2021-01-26 14:18:32,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15667770] [2021-01-26 14:18:32,071 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 14:18:32,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:18:32,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:32,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:32,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:32,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:32,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:32,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:32,439 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 14:18:32,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:32,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:32,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677452940] [2021-01-26 14:18:32,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:32,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:32,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:32,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:32,441 INFO L87 Difference]: Start difference. First operand 34260 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 14:18:33,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:33,533 INFO L93 Difference]: Finished difference Result 34692 states and 77619 transitions. [2021-01-26 14:18:33,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-26 14:18:33,534 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 14:18:33,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:33,578 INFO L225 Difference]: With dead ends: 34692 [2021-01-26 14:18:33,578 INFO L226 Difference]: Without dead ends: 34540 [2021-01-26 14:18:33,579 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2021-01-26 14:18:33,579 INFO L78 Accepts]: Start accepts. Automaton has 34540 states. Word has length 58 [2021-01-26 14:18:33,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:33,579 INFO L481 AbstractCegarLoop]: Abstraction has 34540 states. [2021-01-26 14:18:33,579 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 14:18:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 34540 states. [2021-01-26 14:18:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:33,603 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:33,603 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 14:18:33,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:33,803 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:33,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:33,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1654829134, now seen corresponding path program 42 times [2021-01-26 14:18:33,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:33,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203930534] [2021-01-26 14:18:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:33,960 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 14:18:33,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203930534] [2021-01-26 14:18:33,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22521213] [2021-01-26 14:18:33,961 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 14:18:34,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:18:34,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:34,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:34,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:34,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:34,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:34,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:34,349 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 14:18:34,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:34,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:34,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57040048] [2021-01-26 14:18:34,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:34,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:34,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:34,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:34,351 INFO L87 Difference]: Start difference. First operand 34540 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 14:18:35,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:35,501 INFO L93 Difference]: Finished difference Result 35172 states and 78579 transitions. [2021-01-26 14:18:35,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-26 14:18:35,501 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 14:18:35,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:35,542 INFO L225 Difference]: With dead ends: 35172 [2021-01-26 14:18:35,542 INFO L226 Difference]: Without dead ends: 35020 [2021-01-26 14:18:35,542 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2021-01-26 14:18:35,542 INFO L78 Accepts]: Start accepts. Automaton has 35020 states. Word has length 58 [2021-01-26 14:18:35,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:35,542 INFO L481 AbstractCegarLoop]: Abstraction has 35020 states. [2021-01-26 14:18:35,542 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 14:18:35,543 INFO L276 IsEmpty]: Start isEmpty. Operand 35020 states. [2021-01-26 14:18:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:35,569 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:35,569 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 14:18:35,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:35,770 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:35,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash 841175852, now seen corresponding path program 43 times [2021-01-26 14:18:35,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:35,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505122623] [2021-01-26 14:18:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:35,956 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 14:18:35,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505122623] [2021-01-26 14:18:35,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538689608] [2021-01-26 14:18:35,956 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 14:18:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:36,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:36,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:36,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:36,306 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:36,308 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:36,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:36,316 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:36,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:36,326 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:36,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:36,410 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 14:18:36,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:36,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:36,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862924652] [2021-01-26 14:18:36,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:36,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:36,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:36,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:36,413 INFO L87 Difference]: Start difference. First operand 35020 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 14:18:36,630 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2021-01-26 14:18:37,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:37,558 INFO L93 Difference]: Finished difference Result 35372 states and 78979 transitions. [2021-01-26 14:18:37,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-26 14:18:37,558 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 14:18:37,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:37,601 INFO L225 Difference]: With dead ends: 35372 [2021-01-26 14:18:37,601 INFO L226 Difference]: Without dead ends: 35220 [2021-01-26 14:18:37,601 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2021-01-26 14:18:37,601 INFO L78 Accepts]: Start accepts. Automaton has 35220 states. Word has length 58 [2021-01-26 14:18:37,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:37,602 INFO L481 AbstractCegarLoop]: Abstraction has 35220 states. [2021-01-26 14:18:37,602 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 14:18:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 35220 states. [2021-01-26 14:18:37,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:37,629 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:37,629 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 14:18:37,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:37,834 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:37,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:37,834 INFO L82 PathProgramCache]: Analyzing trace with hash 147775686, now seen corresponding path program 44 times [2021-01-26 14:18:37,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:37,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680394105] [2021-01-26 14:18:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:38,004 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 14:18:38,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680394105] [2021-01-26 14:18:38,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323512824] [2021-01-26 14:18:38,004 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 14:18:38,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:38,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:38,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:38,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:38,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:38,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:38,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:38,485 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 14:18:38,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:38,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:38,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785840823] [2021-01-26 14:18:38,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:38,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:38,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:38,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:38,486 INFO L87 Difference]: Start difference. First operand 35220 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 14:18:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:39,671 INFO L93 Difference]: Finished difference Result 35532 states and 79299 transitions. [2021-01-26 14:18:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-26 14:18:39,671 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 14:18:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:39,712 INFO L225 Difference]: With dead ends: 35532 [2021-01-26 14:18:39,712 INFO L226 Difference]: Without dead ends: 35380 [2021-01-26 14:18:39,712 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=387, Invalid=1419, Unknown=0, NotChecked=0, Total=1806 [2021-01-26 14:18:39,712 INFO L78 Accepts]: Start accepts. Automaton has 35380 states. Word has length 58 [2021-01-26 14:18:39,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:39,713 INFO L481 AbstractCegarLoop]: Abstraction has 35380 states. [2021-01-26 14:18:39,713 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 14:18:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 35380 states. [2021-01-26 14:18:39,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:39,740 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:39,740 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 14:18:39,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-01-26 14:18:39,945 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:39,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:39,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1675816126, now seen corresponding path program 45 times [2021-01-26 14:18:39,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:39,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780468123] [2021-01-26 14:18:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:40,130 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 14:18:40,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780468123] [2021-01-26 14:18:40,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754389133] [2021-01-26 14:18:40,133 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 14:18:40,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:18:40,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:40,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:40,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:40,595 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:40,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:40,599 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:40,649 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 14:18:40,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:40,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:40,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716508736] [2021-01-26 14:18:40,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:40,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:40,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:40,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:40,651 INFO L87 Difference]: Start difference. First operand 35380 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 14:18:41,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:41,851 INFO L93 Difference]: Finished difference Result 35812 states and 79859 transitions. [2021-01-26 14:18:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-26 14:18:41,852 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 14:18:41,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:41,893 INFO L225 Difference]: With dead ends: 35812 [2021-01-26 14:18:41,893 INFO L226 Difference]: Without dead ends: 35660 [2021-01-26 14:18:41,894 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=397, Invalid=1409, Unknown=0, NotChecked=0, Total=1806 [2021-01-26 14:18:41,894 INFO L78 Accepts]: Start accepts. Automaton has 35660 states. Word has length 58 [2021-01-26 14:18:41,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:41,894 INFO L481 AbstractCegarLoop]: Abstraction has 35660 states. [2021-01-26 14:18:41,894 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 14:18:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 35660 states. [2021-01-26 14:18:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:41,921 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:41,922 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 14:18:42,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:42,122 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:42,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:42,123 INFO L82 PathProgramCache]: Analyzing trace with hash -123146184, now seen corresponding path program 46 times [2021-01-26 14:18:42,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:42,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146143085] [2021-01-26 14:18:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:42,303 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 14:18:42,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146143085] [2021-01-26 14:18:42,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263167198] [2021-01-26 14:18:42,304 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 14:18:42,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:18:42,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:42,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:18:42,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:42,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:42,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:42,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:42,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:42,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:42,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:42,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:42,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:42,811 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-01-26 14:18:42,844 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 14:18:42,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:42,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:42,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156009692] [2021-01-26 14:18:42,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:42,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:42,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:42,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:42,846 INFO L87 Difference]: Start difference. First operand 35660 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 14:18:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:44,168 INFO L93 Difference]: Finished difference Result 36012 states and 80259 transitions. [2021-01-26 14:18:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-26 14:18:44,169 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 14:18:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:44,211 INFO L225 Difference]: With dead ends: 36012 [2021-01-26 14:18:44,212 INFO L226 Difference]: Without dead ends: 35860 [2021-01-26 14:18:44,212 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=440, Invalid=1540, Unknown=0, NotChecked=0, Total=1980 [2021-01-26 14:18:44,212 INFO L78 Accepts]: Start accepts. Automaton has 35860 states. Word has length 58 [2021-01-26 14:18:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:44,212 INFO L481 AbstractCegarLoop]: Abstraction has 35860 states. [2021-01-26 14:18:44,212 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 14:18:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 35860 states. [2021-01-26 14:18:44,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:44,239 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:44,240 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 14:18:44,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-26 14:18:44,440 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:44,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:44,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1604977050, now seen corresponding path program 47 times [2021-01-26 14:18:44,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:44,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107111211] [2021-01-26 14:18:44,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:44,617 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 14:18:44,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107111211] [2021-01-26 14:18:44,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182769240] [2021-01-26 14:18:44,617 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 14:18:44,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:18:44,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:44,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:44,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:44,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:44,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:44,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:44,988 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 14:18:44,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:44,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:44,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680121515] [2021-01-26 14:18:44,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:44,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:44,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:44,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:44,990 INFO L87 Difference]: Start difference. First operand 35860 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 14:18:45,153 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2021-01-26 14:18:46,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:46,516 INFO L93 Difference]: Finished difference Result 36172 states and 80579 transitions. [2021-01-26 14:18:46,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-26 14:18:46,517 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 14:18:46,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:46,559 INFO L225 Difference]: With dead ends: 36172 [2021-01-26 14:18:46,559 INFO L226 Difference]: Without dead ends: 36020 [2021-01-26 14:18:46,559 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=490, Invalid=1672, Unknown=0, NotChecked=0, Total=2162 [2021-01-26 14:18:46,559 INFO L78 Accepts]: Start accepts. Automaton has 36020 states. Word has length 58 [2021-01-26 14:18:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:46,560 INFO L481 AbstractCegarLoop]: Abstraction has 36020 states. [2021-01-26 14:18:46,560 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 14:18:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 36020 states. [2021-01-26 14:18:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:46,587 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:46,587 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 14:18:46,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:46,793 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:46,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:46,793 INFO L82 PathProgramCache]: Analyzing trace with hash -76936610, now seen corresponding path program 48 times [2021-01-26 14:18:46,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:46,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883202306] [2021-01-26 14:18:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:46,965 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 14:18:46,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883202306] [2021-01-26 14:18:46,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083926196] [2021-01-26 14:18:46,966 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 14:18:47,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:18:47,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:47,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:47,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:47,342 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:47,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:47,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:47,392 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 14:18:47,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:47,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:47,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104725835] [2021-01-26 14:18:47,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:47,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:47,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:47,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:47,393 INFO L87 Difference]: Start difference. First operand 36020 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 14:18:47,919 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 16 [2021-01-26 14:18:48,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:48,991 INFO L93 Difference]: Finished difference Result 36572 states and 81379 transitions. [2021-01-26 14:18:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-26 14:18:48,992 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 14:18:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:49,031 INFO L225 Difference]: With dead ends: 36572 [2021-01-26 14:18:49,031 INFO L226 Difference]: Without dead ends: 36420 [2021-01-26 14:18:49,032 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=474, Invalid=1688, Unknown=0, NotChecked=0, Total=2162 [2021-01-26 14:18:49,032 INFO L78 Accepts]: Start accepts. Automaton has 36420 states. Word has length 58 [2021-01-26 14:18:49,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:49,032 INFO L481 AbstractCegarLoop]: Abstraction has 36420 states. [2021-01-26 14:18:49,032 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 14:18:49,032 INFO L276 IsEmpty]: Start isEmpty. Operand 36420 states. [2021-01-26 14:18:49,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:49,059 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:49,059 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 14:18:49,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-26 14:18:49,260 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:49,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2038566546, now seen corresponding path program 49 times [2021-01-26 14:18:49,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:49,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979183680] [2021-01-26 14:18:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:49,436 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 14:18:49,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979183680] [2021-01-26 14:18:49,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713911672] [2021-01-26 14:18:49,437 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 14:18:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:49,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:49,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:49,760 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:49,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:49,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:49,809 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 14:18:49,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:49,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:49,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630240583] [2021-01-26 14:18:49,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:49,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:49,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:49,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:49,811 INFO L87 Difference]: Start difference. First operand 36420 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 14:18:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:51,280 INFO L93 Difference]: Finished difference Result 36692 states and 81619 transitions. [2021-01-26 14:18:51,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-26 14:18:51,281 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 14:18:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:51,323 INFO L225 Difference]: With dead ends: 36692 [2021-01-26 14:18:51,323 INFO L226 Difference]: Without dead ends: 36540 [2021-01-26 14:18:51,323 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=485, Invalid=1585, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:18:51,323 INFO L78 Accepts]: Start accepts. Automaton has 36540 states. Word has length 58 [2021-01-26 14:18:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:51,324 INFO L481 AbstractCegarLoop]: Abstraction has 36540 states. [2021-01-26 14:18:51,324 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 14:18:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 36540 states. [2021-01-26 14:18:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:51,351 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:51,351 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 14:18:51,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:51,557 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:51,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:51,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1500399978, now seen corresponding path program 50 times [2021-01-26 14:18:51,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:51,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110814425] [2021-01-26 14:18:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:51,746 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 14:18:51,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110814425] [2021-01-26 14:18:51,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809919537] [2021-01-26 14:18:51,747 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 14:18:51,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:51,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:51,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:51,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:52,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:52,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:52,062 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:52,160 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:52,173 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 14:18:52,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:52,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:52,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288857191] [2021-01-26 14:18:52,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:52,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:52,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:52,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:52,175 INFO L87 Difference]: Start difference. First operand 36540 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 14:18:54,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:54,398 INFO L93 Difference]: Finished difference Result 38194 states and 85102 transitions. [2021-01-26 14:18:54,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-26 14:18:54,399 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 14:18:54,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:54,442 INFO L225 Difference]: With dead ends: 38194 [2021-01-26 14:18:54,442 INFO L226 Difference]: Without dead ends: 37830 [2021-01-26 14:18:54,442 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=727, Invalid=2465, Unknown=0, NotChecked=0, Total=3192 [2021-01-26 14:18:54,442 INFO L78 Accepts]: Start accepts. Automaton has 37830 states. Word has length 58 [2021-01-26 14:18:54,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:54,443 INFO L481 AbstractCegarLoop]: Abstraction has 37830 states. [2021-01-26 14:18:54,443 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 14:18:54,443 INFO L276 IsEmpty]: Start isEmpty. Operand 37830 states. [2021-01-26 14:18:54,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:54,476 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:54,476 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 14:18:54,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:54,677 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:54,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:54,678 INFO L82 PathProgramCache]: Analyzing trace with hash -947669128, now seen corresponding path program 51 times [2021-01-26 14:18:54,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:54,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174518289] [2021-01-26 14:18:54,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:54,877 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 14:18:54,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174518289] [2021-01-26 14:18:54,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478430448] [2021-01-26 14:18:54,877 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 14:18:54,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:18:54,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:54,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:54,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:55,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:55,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:55,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:55,340 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 14:18:55,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:55,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:55,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366002560] [2021-01-26 14:18:55,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:55,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:55,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:55,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:55,341 INFO L87 Difference]: Start difference. First operand 37830 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 14:18:57,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:57,421 INFO L93 Difference]: Finished difference Result 38462 states and 85444 transitions. [2021-01-26 14:18:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-26 14:18:57,422 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 14:18:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:57,462 INFO L225 Difference]: With dead ends: 38462 [2021-01-26 14:18:57,462 INFO L226 Difference]: Without dead ends: 38310 [2021-01-26 14:18:57,463 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=608, Invalid=2044, Unknown=0, NotChecked=0, Total=2652 [2021-01-26 14:18:57,463 INFO L78 Accepts]: Start accepts. Automaton has 38310 states. Word has length 58 [2021-01-26 14:18:57,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:57,464 INFO L481 AbstractCegarLoop]: Abstraction has 38310 states. [2021-01-26 14:18:57,464 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 14:18:57,464 INFO L276 IsEmpty]: Start isEmpty. Operand 38310 states. [2021-01-26 14:18:57,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:57,491 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:57,491 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 14:18:57,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-01-26 14:18:57,692 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:57,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:57,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1375786594, now seen corresponding path program 52 times [2021-01-26 14:18:57,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:57,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460197142] [2021-01-26 14:18:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:57,901 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 14:18:57,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460197142] [2021-01-26 14:18:57,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035470195] [2021-01-26 14:18:57,902 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 14:18:57,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:18:57,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:57,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:18:57,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:58,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:58,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:58,271 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 14:18:58,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:58,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:58,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748617293] [2021-01-26 14:18:58,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:58,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:58,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:58,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:58,272 INFO L87 Difference]: Start difference. First operand 38310 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 14:19:00,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:00,933 INFO L93 Difference]: Finished difference Result 41044 states and 91467 transitions. [2021-01-26 14:19:00,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-26 14:19:00,934 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 14:19:00,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:00,977 INFO L225 Difference]: With dead ends: 41044 [2021-01-26 14:19:00,977 INFO L226 Difference]: Without dead ends: 40680 [2021-01-26 14:19:00,977 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=915, Invalid=3117, Unknown=0, NotChecked=0, Total=4032 [2021-01-26 14:19:00,977 INFO L78 Accepts]: Start accepts. Automaton has 40680 states. Word has length 58 [2021-01-26 14:19:00,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:00,978 INFO L481 AbstractCegarLoop]: Abstraction has 40680 states. [2021-01-26 14:19:00,978 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 14:19:00,978 INFO L276 IsEmpty]: Start isEmpty. Operand 40680 states. [2021-01-26 14:19:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:01,014 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:01,015 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 14:19:01,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:19:01,227 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:01,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:01,228 INFO L82 PathProgramCache]: Analyzing trace with hash 507842304, now seen corresponding path program 53 times [2021-01-26 14:19:01,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:01,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673591812] [2021-01-26 14:19:01,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:01,424 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 14:19:01,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673591812] [2021-01-26 14:19:01,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339937341] [2021-01-26 14:19:01,425 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 14:19:01,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:19:01,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:01,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:01,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:01,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:01,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:01,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:01,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:01,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:01,783 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:01,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:01,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:01,869 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 14:19:01,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:01,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:01,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396590129] [2021-01-26 14:19:01,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:01,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:01,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:01,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:01,870 INFO L87 Difference]: Start difference. First operand 40680 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 14:19:03,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:03,678 INFO L93 Difference]: Finished difference Result 40952 states and 91089 transitions. [2021-01-26 14:19:03,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-26 14:19:03,679 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 14:19:03,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:03,723 INFO L225 Difference]: With dead ends: 40952 [2021-01-26 14:19:03,723 INFO L226 Difference]: Without dead ends: 40800 [2021-01-26 14:19:03,724 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=616, Invalid=2140, Unknown=0, NotChecked=0, Total=2756 [2021-01-26 14:19:03,724 INFO L78 Accepts]: Start accepts. Automaton has 40800 states. Word has length 58 [2021-01-26 14:19:03,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:03,724 INFO L481 AbstractCegarLoop]: Abstraction has 40800 states. [2021-01-26 14:19:03,724 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 14:19:03,725 INFO L276 IsEmpty]: Start isEmpty. Operand 40800 states. [2021-01-26 14:19:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:03,753 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:03,753 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 14:19:03,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:19:03,954 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:03,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:03,954 INFO L82 PathProgramCache]: Analyzing trace with hash -2065044128, now seen corresponding path program 54 times [2021-01-26 14:19:03,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:03,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878709444] [2021-01-26 14:19:03,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:04,253 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 14:19:04,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878709444] [2021-01-26 14:19:04,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362968139] [2021-01-26 14:19:04,254 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 14:19:04,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:19:04,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:04,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:04,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:04,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:04,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:04,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:04,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:04,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:04,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:04,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:04,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:04,722 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 14:19:04,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:04,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:04,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148675627] [2021-01-26 14:19:04,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:04,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:04,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:04,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:04,724 INFO L87 Difference]: Start difference. First operand 40800 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 14:19:06,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:06,530 INFO L93 Difference]: Finished difference Result 41112 states and 91409 transitions. [2021-01-26 14:19:06,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-26 14:19:06,531 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 14:19:06,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:06,584 INFO L225 Difference]: With dead ends: 41112 [2021-01-26 14:19:06,584 INFO L226 Difference]: Without dead ends: 40960 [2021-01-26 14:19:06,584 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=567, Invalid=1883, Unknown=0, NotChecked=0, Total=2450 [2021-01-26 14:19:06,584 INFO L78 Accepts]: Start accepts. Automaton has 40960 states. Word has length 58 [2021-01-26 14:19:06,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:06,585 INFO L481 AbstractCegarLoop]: Abstraction has 40960 states. [2021-01-26 14:19:06,585 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 14:19:06,585 INFO L276 IsEmpty]: Start isEmpty. Operand 40960 states. [2021-01-26 14:19:06,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:06,615 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:06,615 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 14:19:06,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-01-26 14:19:06,816 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:06,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:06,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1309043356, now seen corresponding path program 55 times [2021-01-26 14:19:06,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:06,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670388998] [2021-01-26 14:19:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:07,187 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 14:19:07,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670388998] [2021-01-26 14:19:07,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326684628] [2021-01-26 14:19:07,188 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 14:19:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:07,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:07,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:07,536 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:19:07,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:19:07,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:19:07,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:07,810 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 14:19:07,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:07,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:19:07,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56016262] [2021-01-26 14:19:07,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:19:07,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:07,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:19:07,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:19:07,812 INFO L87 Difference]: Start difference. First operand 40960 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 14:19:10,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:10,464 INFO L93 Difference]: Finished difference Result 43064 states and 96077 transitions. [2021-01-26 14:19:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-26 14:19:10,465 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 14:19:10,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:10,515 INFO L225 Difference]: With dead ends: 43064 [2021-01-26 14:19:10,515 INFO L226 Difference]: Without dead ends: 42700 [2021-01-26 14:19:10,516 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=768, Invalid=2538, Unknown=0, NotChecked=0, Total=3306 [2021-01-26 14:19:10,516 INFO L78 Accepts]: Start accepts. Automaton has 42700 states. Word has length 58 [2021-01-26 14:19:10,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:10,516 INFO L481 AbstractCegarLoop]: Abstraction has 42700 states. [2021-01-26 14:19:10,518 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 14:19:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 42700 states. [2021-01-26 14:19:10,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:10,670 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:10,670 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 14:19:10,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:19:10,886 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:10,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:10,887 INFO L82 PathProgramCache]: Analyzing trace with hash -597019592, now seen corresponding path program 56 times [2021-01-26 14:19:10,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:10,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126051961] [2021-01-26 14:19:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:11,091 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 14:19:11,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126051961] [2021-01-26 14:19:11,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77645688] [2021-01-26 14:19:11,091 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 14:19:11,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:19:11,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:11,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:11,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:11,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:11,456 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 14:19:11,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:11,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:11,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580297507] [2021-01-26 14:19:11,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:11,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:11,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:11,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:11,458 INFO L87 Difference]: Start difference. First operand 42700 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 14:19:12,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:12,556 INFO L93 Difference]: Finished difference Result 43132 states and 96019 transitions. [2021-01-26 14:19:12,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-26 14:19:12,557 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 14:19:12,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:12,608 INFO L225 Difference]: With dead ends: 43132 [2021-01-26 14:19:12,608 INFO L226 Difference]: Without dead ends: 42980 [2021-01-26 14:19:12,608 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-01-26 14:19:12,609 INFO L78 Accepts]: Start accepts. Automaton has 42980 states. Word has length 58 [2021-01-26 14:19:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:12,609 INFO L481 AbstractCegarLoop]: Abstraction has 42980 states. [2021-01-26 14:19:12,609 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 14:19:12,609 INFO L276 IsEmpty]: Start isEmpty. Operand 42980 states. [2021-01-26 14:19:12,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:12,638 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:12,639 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 14:19:12,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-01-26 14:19:12,839 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:12,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:12,840 INFO L82 PathProgramCache]: Analyzing trace with hash 931020848, now seen corresponding path program 57 times [2021-01-26 14:19:12,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:12,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25937718] [2021-01-26 14:19:12,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:13,043 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 14:19:13,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25937718] [2021-01-26 14:19:13,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013609875] [2021-01-26 14:19:13,043 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 14:19:13,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:19:13,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:13,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:13,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:13,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:13,410 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 14:19:13,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:13,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:13,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156358828] [2021-01-26 14:19:13,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:13,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:13,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:13,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:13,411 INFO L87 Difference]: Start difference. First operand 42980 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 14:19:13,685 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2021-01-26 14:19:14,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:14,869 INFO L93 Difference]: Finished difference Result 43812 states and 97507 transitions. [2021-01-26 14:19:14,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-26 14:19:14,869 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 14:19:14,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:14,920 INFO L225 Difference]: With dead ends: 43812 [2021-01-26 14:19:14,921 INFO L226 Difference]: Without dead ends: 43420 [2021-01-26 14:19:14,921 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=462, Invalid=1608, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:19:14,921 INFO L78 Accepts]: Start accepts. Automaton has 43420 states. Word has length 58 [2021-01-26 14:19:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:14,921 INFO L481 AbstractCegarLoop]: Abstraction has 43420 states. [2021-01-26 14:19:14,921 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 14:19:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 43420 states. [2021-01-26 14:19:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:14,951 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:14,951 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 14:19:15,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-26 14:19:15,152 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:15,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:15,153 INFO L82 PathProgramCache]: Analyzing trace with hash -867941462, now seen corresponding path program 58 times [2021-01-26 14:19:15,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:15,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127160906] [2021-01-26 14:19:15,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:15,354 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 14:19:15,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127160906] [2021-01-26 14:19:15,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354659089] [2021-01-26 14:19:15,355 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 14:19:15,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:19:15,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:15,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:19:15,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:15,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:15,667 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 14:19:15,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:15,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:15,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667078736] [2021-01-26 14:19:15,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:15,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:15,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:15,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:15,668 INFO L87 Difference]: Start difference. First operand 43420 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 14:19:17,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:17,066 INFO L93 Difference]: Finished difference Result 44372 states and 98627 transitions. [2021-01-26 14:19:17,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-26 14:19:17,067 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 14:19:17,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:17,117 INFO L225 Difference]: With dead ends: 44372 [2021-01-26 14:19:17,117 INFO L226 Difference]: Without dead ends: 43980 [2021-01-26 14:19:17,117 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:19:17,118 INFO L78 Accepts]: Start accepts. Automaton has 43980 states. Word has length 58 [2021-01-26 14:19:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:17,118 INFO L481 AbstractCegarLoop]: Abstraction has 43980 states. [2021-01-26 14:19:17,118 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 14:19:17,118 INFO L276 IsEmpty]: Start isEmpty. Operand 43980 states. [2021-01-26 14:19:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:17,144 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:17,144 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 14:19:17,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-26 14:19:17,345 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:17,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1582882476, now seen corresponding path program 59 times [2021-01-26 14:19:17,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:17,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650544348] [2021-01-26 14:19:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:17,557 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 14:19:17,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650544348] [2021-01-26 14:19:17,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757489604] [2021-01-26 14:19:17,558 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 14:19:17,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:19:17,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:17,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:17,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:17,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:17,941 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 14:19:17,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:17,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:17,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405891208] [2021-01-26 14:19:17,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:17,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:17,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:17,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:17,943 INFO L87 Difference]: Start difference. First operand 43980 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 14:19:19,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:19,354 INFO L93 Difference]: Finished difference Result 44412 states and 98579 transitions. [2021-01-26 14:19:19,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-26 14:19:19,355 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 14:19:19,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:19,411 INFO L225 Difference]: With dead ends: 44412 [2021-01-26 14:19:19,411 INFO L226 Difference]: Without dead ends: 44260 [2021-01-26 14:19:19,412 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:19:19,412 INFO L78 Accepts]: Start accepts. Automaton has 44260 states. Word has length 58 [2021-01-26 14:19:19,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:19,412 INFO L481 AbstractCegarLoop]: Abstraction has 44260 states. [2021-01-26 14:19:19,412 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 14:19:19,412 INFO L276 IsEmpty]: Start isEmpty. Operand 44260 states. [2021-01-26 14:19:19,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:19,442 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:19,442 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 14:19:19,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:19:19,642 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:19,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:19,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1184044380, now seen corresponding path program 60 times [2021-01-26 14:19:19,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:19,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011955755] [2021-01-26 14:19:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:20,019 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 14:19:20,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011955755] [2021-01-26 14:19:20,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126916746] [2021-01-26 14:19:20,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:19:20,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:19:20,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:20,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:20,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:20,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:20,432 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 14:19:20,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:20,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:20,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257785982] [2021-01-26 14:19:20,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:20,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:20,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:20,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:20,434 INFO L87 Difference]: Start difference. First operand 44260 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 14:19:22,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:22,152 INFO L93 Difference]: Finished difference Result 44892 states and 99667 transitions. [2021-01-26 14:19:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-26 14:19:22,153 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 14:19:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:22,203 INFO L225 Difference]: With dead ends: 44892 [2021-01-26 14:19:22,203 INFO L226 Difference]: Without dead ends: 44500 [2021-01-26 14:19:22,203 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=537, Invalid=2013, Unknown=0, NotChecked=0, Total=2550 [2021-01-26 14:19:22,203 INFO L78 Accepts]: Start accepts. Automaton has 44500 states. Word has length 58 [2021-01-26 14:19:22,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:22,203 INFO L481 AbstractCegarLoop]: Abstraction has 44500 states. [2021-01-26 14:19:22,204 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 14:19:22,204 INFO L276 IsEmpty]: Start isEmpty. Operand 44500 states. [2021-01-26 14:19:22,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:22,233 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:22,233 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 14:19:22,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:19:22,434 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:22,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:22,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1311960606, now seen corresponding path program 61 times [2021-01-26 14:19:22,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:22,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073933915] [2021-01-26 14:19:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:22,645 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 14:19:22,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073933915] [2021-01-26 14:19:22,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377748674] [2021-01-26 14:19:22,645 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 14:19:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:22,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:22,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:23,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:23,140 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 14:19:23,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:23,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:23,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678369357] [2021-01-26 14:19:23,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:23,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:23,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:23,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:23,142 INFO L87 Difference]: Start difference. First operand 44500 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 14:19:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:24,601 INFO L93 Difference]: Finished difference Result 44772 states and 99299 transitions. [2021-01-26 14:19:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-26 14:19:24,602 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 14:19:24,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:24,653 INFO L225 Difference]: With dead ends: 44772 [2021-01-26 14:19:24,653 INFO L226 Difference]: Without dead ends: 44620 [2021-01-26 14:19:24,654 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2021-01-26 14:19:24,654 INFO L78 Accepts]: Start accepts. Automaton has 44620 states. Word has length 58 [2021-01-26 14:19:24,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:24,654 INFO L481 AbstractCegarLoop]: Abstraction has 44620 states. [2021-01-26 14:19:24,654 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 14:19:24,654 INFO L276 IsEmpty]: Start isEmpty. Operand 44620 states. [2021-01-26 14:19:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:24,684 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:24,684 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 14:19:24,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:19:24,885 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:24,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:24,885 INFO L82 PathProgramCache]: Analyzing trace with hash -255638260, now seen corresponding path program 62 times [2021-01-26 14:19:24,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:24,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937950171] [2021-01-26 14:19:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:25,074 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 14:19:25,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937950171] [2021-01-26 14:19:25,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707907591] [2021-01-26 14:19:25,074 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 14:19:25,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:19:25,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:25,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:25,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:25,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:25,441 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 14:19:25,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:25,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:25,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008917879] [2021-01-26 14:19:25,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:25,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:25,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:25,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:25,442 INFO L87 Difference]: Start difference. First operand 44620 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 14:19:26,419 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-01-26 14:19:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:27,249 INFO L93 Difference]: Finished difference Result 45052 states and 99859 transitions. [2021-01-26 14:19:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-26 14:19:27,250 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 14:19:27,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:27,302 INFO L225 Difference]: With dead ends: 45052 [2021-01-26 14:19:27,303 INFO L226 Difference]: Without dead ends: 44900 [2021-01-26 14:19:27,303 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2021-01-26 14:19:27,303 INFO L78 Accepts]: Start accepts. Automaton has 44900 states. Word has length 58 [2021-01-26 14:19:27,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:27,303 INFO L481 AbstractCegarLoop]: Abstraction has 44900 states. [2021-01-26 14:19:27,303 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 14:19:27,303 INFO L276 IsEmpty]: Start isEmpty. Operand 44900 states. [2021-01-26 14:19:27,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:27,334 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:27,334 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 14:19:27,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:19:27,535 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:27,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:27,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1272402180, now seen corresponding path program 63 times [2021-01-26 14:19:27,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:27,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287404307] [2021-01-26 14:19:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:27,753 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 14:19:27,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287404307] [2021-01-26 14:19:27,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922696291] [2021-01-26 14:19:27,753 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 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 14:19:27,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:19:27,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:27,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:27,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:28,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:28,169 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 14:19:28,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:28,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:28,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87779453] [2021-01-26 14:19:28,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:28,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:28,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:28,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:28,171 INFO L87 Difference]: Start difference. First operand 44900 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 14:19:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:30,082 INFO L93 Difference]: Finished difference Result 45212 states and 100179 transitions. [2021-01-26 14:19:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-26 14:19:30,083 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 14:19:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:30,135 INFO L225 Difference]: With dead ends: 45212 [2021-01-26 14:19:30,135 INFO L226 Difference]: Without dead ends: 45060 [2021-01-26 14:19:30,135 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-01-26 14:19:30,136 INFO L78 Accepts]: Start accepts. Automaton has 45060 states. Word has length 58 [2021-01-26 14:19:30,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:30,136 INFO L481 AbstractCegarLoop]: Abstraction has 45060 states. [2021-01-26 14:19:30,136 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 14:19:30,136 INFO L276 IsEmpty]: Start isEmpty. Operand 45060 states. [2021-01-26 14:19:30,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:30,165 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:30,165 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 14:19:30,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-01-26 14:19:30,366 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:30,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:30,366 INFO L82 PathProgramCache]: Analyzing trace with hash -526560130, now seen corresponding path program 64 times [2021-01-26 14:19:30,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:30,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950189922] [2021-01-26 14:19:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:30,578 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 14:19:30,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950189922] [2021-01-26 14:19:30,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601254002] [2021-01-26 14:19:30,578 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 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 14:19:30,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:19:30,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:30,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:19:30,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:30,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:30,916 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 14:19:30,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:30,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:30,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79401971] [2021-01-26 14:19:30,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:30,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:30,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:30,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:30,918 INFO L87 Difference]: Start difference. First operand 45060 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 14:19:32,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:32,603 INFO L93 Difference]: Finished difference Result 45612 states and 101107 transitions. [2021-01-26 14:19:32,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-26 14:19:32,604 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 14:19:32,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:32,659 INFO L225 Difference]: With dead ends: 45612 [2021-01-26 14:19:32,660 INFO L226 Difference]: Without dead ends: 45220 [2021-01-26 14:19:32,660 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=549, Invalid=2103, Unknown=0, NotChecked=0, Total=2652 [2021-01-26 14:19:32,660 INFO L78 Accepts]: Start accepts. Automaton has 45220 states. Word has length 58 [2021-01-26 14:19:32,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:32,660 INFO L481 AbstractCegarLoop]: Abstraction has 45220 states. [2021-01-26 14:19:32,661 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 14:19:32,661 INFO L276 IsEmpty]: Start isEmpty. Operand 45220 states. [2021-01-26 14:19:32,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:32,888 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:32,888 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 14:19:33,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:19:33,097 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:33,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:33,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1950977952, now seen corresponding path program 65 times [2021-01-26 14:19:33,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:33,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007777175] [2021-01-26 14:19:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:33,283 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 14:19:33,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007777175] [2021-01-26 14:19:33,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768955320] [2021-01-26 14:19:33,283 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 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 14:19:33,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:19:33,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:33,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:33,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:33,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:33,634 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 14:19:33,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:33,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:33,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482644409] [2021-01-26 14:19:33,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:33,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:33,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:33,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:33,635 INFO L87 Difference]: Start difference. First operand 45220 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 14:19:35,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:35,342 INFO L93 Difference]: Finished difference Result 45412 states and 100579 transitions. [2021-01-26 14:19:35,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-26 14:19:35,343 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 14:19:35,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:35,398 INFO L225 Difference]: With dead ends: 45412 [2021-01-26 14:19:35,398 INFO L226 Difference]: Without dead ends: 45260 [2021-01-26 14:19:35,398 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=604, Invalid=2048, Unknown=0, NotChecked=0, Total=2652 [2021-01-26 14:19:35,398 INFO L78 Accepts]: Start accepts. Automaton has 45260 states. Word has length 58 [2021-01-26 14:19:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:35,399 INFO L481 AbstractCegarLoop]: Abstraction has 45260 states. [2021-01-26 14:19:35,399 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 14:19:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 45260 states. [2021-01-26 14:19:35,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:35,431 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:35,431 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 14:19:35,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:19:35,632 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:35,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:35,633 INFO L82 PathProgramCache]: Analyzing trace with hash -422937512, now seen corresponding path program 66 times [2021-01-26 14:19:35,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:35,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546501306] [2021-01-26 14:19:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:36,046 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 14:19:36,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546501306] [2021-01-26 14:19:36,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081455081] [2021-01-26 14:19:36,047 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 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 14:19:36,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:19:36,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:36,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:36,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:36,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:36,465 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 14:19:36,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:36,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:36,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644297090] [2021-01-26 14:19:36,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:36,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:36,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:36,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:36,467 INFO L87 Difference]: Start difference. First operand 45260 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 14:19:38,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:38,278 INFO L93 Difference]: Finished difference Result 45572 states and 100899 transitions. [2021-01-26 14:19:38,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-26 14:19:38,279 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 14:19:38,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:38,330 INFO L225 Difference]: With dead ends: 45572 [2021-01-26 14:19:38,330 INFO L226 Difference]: Without dead ends: 45420 [2021-01-26 14:19:38,331 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=629, Invalid=2127, Unknown=0, NotChecked=0, Total=2756 [2021-01-26 14:19:38,331 INFO L78 Accepts]: Start accepts. Automaton has 45420 states. Word has length 58 [2021-01-26 14:19:38,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:38,332 INFO L481 AbstractCegarLoop]: Abstraction has 45420 states. [2021-01-26 14:19:38,332 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 14:19:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 45420 states. [2021-01-26 14:19:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:38,363 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:38,363 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 14:19:38,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:19:38,564 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:38,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:38,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1692565644, now seen corresponding path program 67 times [2021-01-26 14:19:38,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:38,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861402679] [2021-01-26 14:19:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:38,760 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 14:19:38,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861402679] [2021-01-26 14:19:38,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874380316] [2021-01-26 14:19:38,760 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 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 14:19:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:38,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:38,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:39,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:39,224 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 14:19:39,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:39,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:39,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090329548] [2021-01-26 14:19:39,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:39,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:39,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:39,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:39,225 INFO L87 Difference]: Start difference. First operand 45420 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 14:19:40,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:40,932 INFO L93 Difference]: Finished difference Result 45842 states and 101534 transitions. [2021-01-26 14:19:40,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-26 14:19:40,933 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 14:19:40,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:40,983 INFO L225 Difference]: With dead ends: 45842 [2021-01-26 14:19:40,984 INFO L226 Difference]: Without dead ends: 45690 [2021-01-26 14:19:40,984 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-01-26 14:19:40,984 INFO L78 Accepts]: Start accepts. Automaton has 45690 states. Word has length 58 [2021-01-26 14:19:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:40,985 INFO L481 AbstractCegarLoop]: Abstraction has 45690 states. [2021-01-26 14:19:40,985 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 14:19:40,985 INFO L276 IsEmpty]: Start isEmpty. Operand 45690 states. [2021-01-26 14:19:41,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:41,016 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:41,016 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 14:19:41,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:19:41,217 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:41,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:41,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1846400880, now seen corresponding path program 68 times [2021-01-26 14:19:41,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:41,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882299032] [2021-01-26 14:19:41,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:41,415 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 14:19:41,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882299032] [2021-01-26 14:19:41,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804904109] [2021-01-26 14:19:41,415 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 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 14:19:41,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:19:41,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:41,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:41,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:41,698 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:19:41,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:41,891 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 14:19:41,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:41,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:19:41,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143920879] [2021-01-26 14:19:41,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:19:41,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:41,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:19:41,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:19:41,893 INFO L87 Difference]: Start difference. First operand 45690 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 14:19:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:44,011 INFO L93 Difference]: Finished difference Result 48414 states and 107252 transitions. [2021-01-26 14:19:44,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-26 14:19:44,012 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 14:19:44,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:44,069 INFO L225 Difference]: With dead ends: 48414 [2021-01-26 14:19:44,069 INFO L226 Difference]: Without dead ends: 48050 [2021-01-26 14:19:44,069 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=780, Invalid=2642, Unknown=0, NotChecked=0, Total=3422 [2021-01-26 14:19:44,069 INFO L78 Accepts]: Start accepts. Automaton has 48050 states. Word has length 58 [2021-01-26 14:19:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:44,070 INFO L481 AbstractCegarLoop]: Abstraction has 48050 states. [2021-01-26 14:19:44,070 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 14:19:44,070 INFO L276 IsEmpty]: Start isEmpty. Operand 48050 states. [2021-01-26 14:19:44,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:44,101 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:44,101 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 14:19:44,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-01-26 14:19:44,302 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:44,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:44,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1293670030, now seen corresponding path program 69 times [2021-01-26 14:19:44,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:44,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428988109] [2021-01-26 14:19:44,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:44,509 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 14:19:44,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428988109] [2021-01-26 14:19:44,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594813663] [2021-01-26 14:19:44,509 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 14:19:44,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:19:44,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:44,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:44,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:44,827 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:44,862 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 14:19:44,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:44,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:44,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87971296] [2021-01-26 14:19:44,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:44,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:44,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:44,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:44,864 INFO L87 Difference]: Start difference. First operand 48050 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 14:19:47,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:47,227 INFO L93 Difference]: Finished difference Result 48962 states and 108282 transitions. [2021-01-26 14:19:47,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-26 14:19:47,228 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 14:19:47,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:47,281 INFO L225 Difference]: With dead ends: 48962 [2021-01-26 14:19:47,281 INFO L226 Difference]: Without dead ends: 48570 [2021-01-26 14:19:47,281 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=780, Invalid=2880, Unknown=0, NotChecked=0, Total=3660 [2021-01-26 14:19:47,282 INFO L78 Accepts]: Start accepts. Automaton has 48570 states. Word has length 58 [2021-01-26 14:19:47,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:47,282 INFO L481 AbstractCegarLoop]: Abstraction has 48570 states. [2021-01-26 14:19:47,282 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 14:19:47,282 INFO L276 IsEmpty]: Start isEmpty. Operand 48570 states. [2021-01-26 14:19:47,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:47,312 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:47,312 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 14:19:47,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-01-26 14:19:47,513 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:47,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:47,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1721787496, now seen corresponding path program 70 times [2021-01-26 14:19:47,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:47,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184647106] [2021-01-26 14:19:47,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:47,737 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 14:19:47,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184647106] [2021-01-26 14:19:47,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255822226] [2021-01-26 14:19:47,737 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 14:19:47,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:19:47,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:47,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:19:47,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:48,035 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:19:48,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:48,102 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 14:19:48,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:48,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:19:48,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711733821] [2021-01-26 14:19:48,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:19:48,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:48,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:19:48,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:19:48,104 INFO L87 Difference]: Start difference. First operand 48570 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 14:19:48,482 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 14 [2021-01-26 14:19:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:51,315 INFO L93 Difference]: Finished difference Result 50214 states and 111232 transitions. [2021-01-26 14:19:51,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-26 14:19:51,316 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 14:19:51,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:51,376 INFO L225 Difference]: With dead ends: 50214 [2021-01-26 14:19:51,377 INFO L226 Difference]: Without dead ends: 49850 [2021-01-26 14:19:51,377 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1093, Invalid=3737, Unknown=0, NotChecked=0, Total=4830 [2021-01-26 14:19:51,377 INFO L78 Accepts]: Start accepts. Automaton has 49850 states. Word has length 58 [2021-01-26 14:19:51,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:51,377 INFO L481 AbstractCegarLoop]: Abstraction has 49850 states. [2021-01-26 14:19:51,377 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 14:19:51,378 INFO L276 IsEmpty]: Start isEmpty. Operand 49850 states. [2021-01-26 14:19:51,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:51,409 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:51,409 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 14:19:51,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:19:51,610 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:51,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:51,610 INFO L82 PathProgramCache]: Analyzing trace with hash 161841402, now seen corresponding path program 71 times [2021-01-26 14:19:51,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:51,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868205057] [2021-01-26 14:19:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:51,829 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 14:19:51,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868205057] [2021-01-26 14:19:51,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372691511] [2021-01-26 14:19:51,830 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 14:19:51,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:19:51,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:51,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:51,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:52,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:52,336 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 14:19:52,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:52,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:52,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112061968] [2021-01-26 14:19:52,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:52,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:52,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:52,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:52,338 INFO L87 Difference]: Start difference. First operand 49850 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 14:19:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:54,499 INFO L93 Difference]: Finished difference Result 50362 states and 111334 transitions. [2021-01-26 14:19:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-26 14:19:54,500 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 14:19:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:54,562 INFO L225 Difference]: With dead ends: 50362 [2021-01-26 14:19:54,563 INFO L226 Difference]: Without dead ends: 50210 [2021-01-26 14:19:54,563 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=724, Invalid=2468, Unknown=0, NotChecked=0, Total=3192 [2021-01-26 14:19:54,563 INFO L78 Accepts]: Start accepts. Automaton has 50210 states. Word has length 58 [2021-01-26 14:19:54,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:54,563 INFO L481 AbstractCegarLoop]: Abstraction has 50210 states. [2021-01-26 14:19:54,563 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 14:19:54,563 INFO L276 IsEmpty]: Start isEmpty. Operand 50210 states. [2021-01-26 14:19:54,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:54,595 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:54,595 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 14:19:54,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:19:54,796 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:54,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1883922266, now seen corresponding path program 72 times [2021-01-26 14:19:54,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:54,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419917309] [2021-01-26 14:19:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:55,033 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 14:19:55,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419917309] [2021-01-26 14:19:55,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364383857] [2021-01-26 14:19:55,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:19:55,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:19:55,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:19:55,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:55,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:55,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:55,436 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 14:19:55,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:55,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:19:55,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258913024] [2021-01-26 14:19:55,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:19:55,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:55,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:19:55,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:19:55,438 INFO L87 Difference]: Start difference. First operand 50210 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 14:19:58,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:19:58,188 INFO L93 Difference]: Finished difference Result 51590 states and 114172 transitions. [2021-01-26 14:19:58,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-26 14:19:58,189 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 14:19:58,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:19:58,259 INFO L225 Difference]: With dead ends: 51590 [2021-01-26 14:19:58,259 INFO L226 Difference]: Without dead ends: 51110 [2021-01-26 14:19:58,260 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=887, Invalid=3273, Unknown=0, NotChecked=0, Total=4160 [2021-01-26 14:19:58,260 INFO L78 Accepts]: Start accepts. Automaton has 51110 states. Word has length 58 [2021-01-26 14:19:58,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:19:58,260 INFO L481 AbstractCegarLoop]: Abstraction has 51110 states. [2021-01-26 14:19:58,260 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 14:19:58,260 INFO L276 IsEmpty]: Start isEmpty. Operand 51110 states. [2021-01-26 14:19:58,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:19:58,294 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:19:58,294 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 14:19:58,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:19:58,495 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:19:58,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:19:58,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1655044258, now seen corresponding path program 73 times [2021-01-26 14:19:58,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:19:58,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427786998] [2021-01-26 14:19:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:19:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:58,725 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 14:19:58,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427786998] [2021-01-26 14:19:58,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716105663] [2021-01-26 14:19:58,726 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 14:19:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:19:58,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:19:58,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:19:59,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:19:59,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:19:59,036 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 14:19:59,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:19:59,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:19:59,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228643833] [2021-01-26 14:19:59,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:19:59,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:19:59,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:19:59,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:19:59,038 INFO L87 Difference]: Start difference. First operand 51110 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 14:20:02,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:02,112 INFO L93 Difference]: Finished difference Result 55174 states and 122104 transitions. [2021-01-26 14:20:02,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-26 14:20:02,113 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 14:20:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:02,182 INFO L225 Difference]: With dead ends: 55174 [2021-01-26 14:20:02,182 INFO L226 Difference]: Without dead ends: 54640 [2021-01-26 14:20:02,182 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1097, Invalid=3873, Unknown=0, NotChecked=0, Total=4970 [2021-01-26 14:20:02,183 INFO L78 Accepts]: Start accepts. Automaton has 54640 states. Word has length 58 [2021-01-26 14:20:02,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:02,183 INFO L481 AbstractCegarLoop]: Abstraction has 54640 states. [2021-01-26 14:20:02,183 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 14:20:02,183 INFO L276 IsEmpty]: Start isEmpty. Operand 54640 states. [2021-01-26 14:20:02,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:02,218 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:02,218 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 14:20:02,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:20:02,418 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:02,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:02,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1791249794, now seen corresponding path program 74 times [2021-01-26 14:20:02,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:02,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030499763] [2021-01-26 14:20:02,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:02,629 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 14:20:02,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030499763] [2021-01-26 14:20:02,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411149854] [2021-01-26 14:20:02,630 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 14:20:02,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:20:02,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:20:02,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:20:02,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:03,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:03,024 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:03,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:03,103 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 14:20:03,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:03,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:20:03,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498368171] [2021-01-26 14:20:03,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:20:03,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:03,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:20:03,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:20:03,105 INFO L87 Difference]: Start difference. First operand 54640 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 14:20:05,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:05,719 INFO L93 Difference]: Finished difference Result 55432 states and 122329 transitions. [2021-01-26 14:20:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-26 14:20:05,720 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 14:20:05,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:05,786 INFO L225 Difference]: With dead ends: 55432 [2021-01-26 14:20:05,786 INFO L226 Difference]: Without dead ends: 55280 [2021-01-26 14:20:05,787 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=782, Invalid=2524, Unknown=0, NotChecked=0, Total=3306 [2021-01-26 14:20:05,787 INFO L78 Accepts]: Start accepts. Automaton has 55280 states. Word has length 58 [2021-01-26 14:20:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:05,787 INFO L481 AbstractCegarLoop]: Abstraction has 55280 states. [2021-01-26 14:20:05,787 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 14:20:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 55280 states. [2021-01-26 14:20:05,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:05,820 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:05,820 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 14:20:06,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:20:06,021 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:06,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:06,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1035249022, now seen corresponding path program 75 times [2021-01-26 14:20:06,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:06,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651381807] [2021-01-26 14:20:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:06,241 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 14:20:06,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651381807] [2021-01-26 14:20:06,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280989757] [2021-01-26 14:20:06,241 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 14:20:06,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-26 14:20:06,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:20:06,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:20:06,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:06,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:20:06,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:20:06,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:20:06,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:06,734 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 14:20:06,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:06,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:20:06,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583864096] [2021-01-26 14:20:06,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:20:06,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:06,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:20:06,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:20:06,736 INFO L87 Difference]: Start difference. First operand 55280 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 14:20:10,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:10,337 INFO L93 Difference]: Finished difference Result 57294 states and 126532 transitions. [2021-01-26 14:20:10,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-26 14:20:10,339 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 14:20:10,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:10,412 INFO L225 Difference]: With dead ends: 57294 [2021-01-26 14:20:10,412 INFO L226 Difference]: Without dead ends: 56930 [2021-01-26 14:20:10,412 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1048, Invalid=3374, Unknown=0, NotChecked=0, Total=4422 [2021-01-26 14:20:10,412 INFO L78 Accepts]: Start accepts. Automaton has 56930 states. Word has length 58 [2021-01-26 14:20:10,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:10,413 INFO L481 AbstractCegarLoop]: Abstraction has 56930 states. [2021-01-26 14:20:10,413 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 14:20:10,413 INFO L276 IsEmpty]: Start isEmpty. Operand 56930 states. [2021-01-26 14:20:10,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:10,446 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:10,447 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 14:20:10,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:20:10,647 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:10,648 INFO L82 PathProgramCache]: Analyzing trace with hash -313056756, now seen corresponding path program 76 times [2021-01-26 14:20:10,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:10,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15260363] [2021-01-26 14:20:10,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:10,893 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 14:20:10,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15260363] [2021-01-26 14:20:10,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046227993] [2021-01-26 14:20:10,894 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 14:20:10,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:20:10,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:20:10,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:20:10,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:11,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:11,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:11,280 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 14:20:11,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:11,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:20:11,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092531425] [2021-01-26 14:20:11,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:20:11,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:11,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:20:11,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:20:11,281 INFO L87 Difference]: Start difference. First operand 56930 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 14:20:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:14,888 INFO L93 Difference]: Finished difference Result 60276 states and 133483 transitions. [2021-01-26 14:20:14,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-26 14:20:14,889 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 14:20:14,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:14,967 INFO L225 Difference]: With dead ends: 60276 [2021-01-26 14:20:14,967 INFO L226 Difference]: Without dead ends: 59460 [2021-01-26 14:20:14,968 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1140, Invalid=4262, Unknown=0, NotChecked=0, Total=5402 [2021-01-26 14:20:14,968 INFO L78 Accepts]: Start accepts. Automaton has 59460 states. Word has length 58 [2021-01-26 14:20:14,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:14,968 INFO L481 AbstractCegarLoop]: Abstraction has 59460 states. [2021-01-26 14:20:14,968 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 14:20:14,968 INFO L276 IsEmpty]: Start isEmpty. Operand 59460 states. [2021-01-26 14:20:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:15,003 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:15,003 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 14:20:15,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:20:15,204 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:15,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:15,204 INFO L82 PathProgramCache]: Analyzing trace with hash 828546426, now seen corresponding path program 77 times [2021-01-26 14:20:15,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:15,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770567044] [2021-01-26 14:20:15,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:15,431 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 14:20:15,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770567044] [2021-01-26 14:20:15,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690541228] [2021-01-26 14:20:15,431 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 14:20:15,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:20:15,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:20:15,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:20:15,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:15,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:15,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:15,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:15,863 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 14:20:15,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:15,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:20:15,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937513292] [2021-01-26 14:20:15,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:20:15,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:15,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:20:15,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:20:15,864 INFO L87 Difference]: Start difference. First operand 59460 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 14:20:17,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:17,151 INFO L93 Difference]: Finished difference Result 60212 states and 132839 transitions. [2021-01-26 14:20:17,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-26 14:20:17,152 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 14:20:17,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:17,228 INFO L225 Difference]: With dead ends: 60212 [2021-01-26 14:20:17,228 INFO L226 Difference]: Without dead ends: 60060 [2021-01-26 14:20:17,228 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2021-01-26 14:20:17,228 INFO L78 Accepts]: Start accepts. Automaton has 60060 states. Word has length 58 [2021-01-26 14:20:17,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:17,229 INFO L481 AbstractCegarLoop]: Abstraction has 60060 states. [2021-01-26 14:20:17,229 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 14:20:17,229 INFO L276 IsEmpty]: Start isEmpty. Operand 60060 states. [2021-01-26 14:20:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:17,263 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:17,263 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 14:20:17,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-01-26 14:20:17,471 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:17,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:17,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1760184768, now seen corresponding path program 78 times [2021-01-26 14:20:17,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:17,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407469711] [2021-01-26 14:20:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:17,700 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 14:20:17,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407469711] [2021-01-26 14:20:17,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795861363] [2021-01-26 14:20:17,700 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 14:20:17,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:20:17,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:20:17,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:20:17,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:18,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:18,056 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 14:20:18,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:18,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:20:18,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979965439] [2021-01-26 14:20:18,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:20:18,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:18,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:20:18,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:20:18,058 INFO L87 Difference]: Start difference. First operand 60060 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 14:20:19,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:19,106 INFO L93 Difference]: Finished difference Result 60612 states and 133639 transitions. [2021-01-26 14:20:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-26 14:20:19,107 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 14:20:19,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:19,187 INFO L225 Difference]: With dead ends: 60612 [2021-01-26 14:20:19,187 INFO L226 Difference]: Without dead ends: 60460 [2021-01-26 14:20:19,187 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-01-26 14:20:19,187 INFO L78 Accepts]: Start accepts. Automaton has 60460 states. Word has length 58 [2021-01-26 14:20:19,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:19,188 INFO L481 AbstractCegarLoop]: Abstraction has 60460 states. [2021-01-26 14:20:19,188 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 14:20:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 60460 states. [2021-01-26 14:20:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:19,223 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:19,223 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 14:20:19,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:20:19,424 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:19,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1845470330, now seen corresponding path program 79 times [2021-01-26 14:20:19,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:19,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178964746] [2021-01-26 14:20:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:19,909 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 14:20:19,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178964746] [2021-01-26 14:20:19,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624248576] [2021-01-26 14:20:19,909 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 14:20:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:19,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:20:19,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:20,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:20,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:20,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:20,381 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 14:20:20,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:20,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:20:20,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156517883] [2021-01-26 14:20:20,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:20:20,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:20,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:20:20,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:20:20,383 INFO L87 Difference]: Start difference. First operand 60460 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 14:20:21,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:21,769 INFO L93 Difference]: Finished difference Result 61052 states and 134519 transitions. [2021-01-26 14:20:21,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-26 14:20:21,771 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 14:20:21,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:21,848 INFO L225 Difference]: With dead ends: 61052 [2021-01-26 14:20:21,849 INFO L226 Difference]: Without dead ends: 60900 [2021-01-26 14:20:21,849 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2021-01-26 14:20:21,849 INFO L78 Accepts]: Start accepts. Automaton has 60900 states. Word has length 58 [2021-01-26 14:20:21,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:21,849 INFO L481 AbstractCegarLoop]: Abstraction has 60900 states. [2021-01-26 14:20:21,849 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 14:20:21,849 INFO L276 IsEmpty]: Start isEmpty. Operand 60900 states. [2021-01-26 14:20:21,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:21,882 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:21,882 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 14:20:22,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-01-26 14:20:22,090 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:22,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:22,090 INFO L82 PathProgramCache]: Analyzing trace with hash -139234228, now seen corresponding path program 80 times [2021-01-26 14:20:22,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:22,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79936709] [2021-01-26 14:20:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:22,303 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 14:20:22,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79936709] [2021-01-26 14:20:22,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357892434] [2021-01-26 14:20:22,303 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 14:20:22,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:20:22,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:20:22,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:20:22,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:22,657 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:22,710 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 14:20:22,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:22,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:20:22,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803307582] [2021-01-26 14:20:22,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:20:22,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:22,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:20:22,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:20:22,712 INFO L87 Difference]: Start difference. First operand 60900 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 14:20:23,630 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-01-26 14:20:24,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:24,084 INFO L93 Difference]: Finished difference Result 61332 states and 135079 transitions. [2021-01-26 14:20:24,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-26 14:20:24,085 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 14:20:24,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:24,164 INFO L225 Difference]: With dead ends: 61332 [2021-01-26 14:20:24,164 INFO L226 Difference]: Without dead ends: 61180 [2021-01-26 14:20:24,164 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=409, Invalid=1151, Unknown=0, NotChecked=0, Total=1560 [2021-01-26 14:20:24,164 INFO L78 Accepts]: Start accepts. Automaton has 61180 states. Word has length 58 [2021-01-26 14:20:24,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:24,164 INFO L481 AbstractCegarLoop]: Abstraction has 61180 states. [2021-01-26 14:20:24,165 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 14:20:24,165 INFO L276 IsEmpty]: Start isEmpty. Operand 61180 states. [2021-01-26 14:20:24,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:24,200 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:24,200 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 14:20:24,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:20:24,401 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:24,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:24,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1544097498, now seen corresponding path program 81 times [2021-01-26 14:20:24,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:24,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000806586] [2021-01-26 14:20:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:24,624 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 14:20:24,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000806586] [2021-01-26 14:20:24,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488193431] [2021-01-26 14:20:24,625 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 14:20:24,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:20:24,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:20:24,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:20:24,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:25,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:25,024 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:25,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:25,246 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-01-26 14:20:25,272 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 14:20:25,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:25,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:20:25,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544908625] [2021-01-26 14:20:25,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:20:25,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:25,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:20:25,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:20:25,273 INFO L87 Difference]: Start difference. First operand 61180 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 14:20:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:26,577 INFO L93 Difference]: Finished difference Result 61532 states and 135479 transitions. [2021-01-26 14:20:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-26 14:20:26,578 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 14:20:26,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:26,658 INFO L225 Difference]: With dead ends: 61532 [2021-01-26 14:20:26,658 INFO L226 Difference]: Without dead ends: 61380 [2021-01-26 14:20:26,658 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-01-26 14:20:26,659 INFO L78 Accepts]: Start accepts. Automaton has 61380 states. Word has length 58 [2021-01-26 14:20:26,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:26,659 INFO L481 AbstractCegarLoop]: Abstraction has 61380 states. [2021-01-26 14:20:26,659 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 14:20:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 61380 states. [2021-01-26 14:20:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:26,693 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:26,693 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 14:20:26,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-01-26 14:20:26,894 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:26,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:26,895 INFO L82 PathProgramCache]: Analyzing trace with hash 162138604, now seen corresponding path program 82 times [2021-01-26 14:20:26,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:26,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307447153] [2021-01-26 14:20:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:27,102 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-01-26 14:20:27,292 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 14:20:27,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307447153] [2021-01-26 14:20:27,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563086560] [2021-01-26 14:20:27,293 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 14:20:27,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:20:27,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:20:27,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:20:27,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:27,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:27,640 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 14:20:27,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:27,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:20:27,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938006403] [2021-01-26 14:20:27,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:20:27,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:27,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:20:27,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:20:27,642 INFO L87 Difference]: Start difference. First operand 61380 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 14:20:29,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:29,135 INFO L93 Difference]: Finished difference Result 61572 states and 135559 transitions. [2021-01-26 14:20:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-26 14:20:29,137 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 14:20:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:29,250 INFO L225 Difference]: With dead ends: 61572 [2021-01-26 14:20:29,250 INFO L226 Difference]: Without dead ends: 61420 [2021-01-26 14:20:29,250 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=387, Invalid=1253, Unknown=0, NotChecked=0, Total=1640 [2021-01-26 14:20:29,250 INFO L78 Accepts]: Start accepts. Automaton has 61420 states. Word has length 58 [2021-01-26 14:20:29,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:29,251 INFO L481 AbstractCegarLoop]: Abstraction has 61420 states. [2021-01-26 14:20:29,251 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 14:20:29,251 INFO L276 IsEmpty]: Start isEmpty. Operand 61420 states. [2021-01-26 14:20:29,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:29,297 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:29,297 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 14:20:29,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-01-26 14:20:29,510 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:29,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:29,511 INFO L82 PathProgramCache]: Analyzing trace with hash -660751790, now seen corresponding path program 83 times [2021-01-26 14:20:29,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:29,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624617916] [2021-01-26 14:20:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:29,914 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-01-26 14:20:30,293 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 14:20:30,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624617916] [2021-01-26 14:20:30,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148372756] [2021-01-26 14:20:30,294 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 14:20:30,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:20:30,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:20:30,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:20:30,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:30,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:30,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:30,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:30,765 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 14:20:30,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:30,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:20:30,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911905076] [2021-01-26 14:20:30,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:20:30,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:30,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:20:30,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:20:30,766 INFO L87 Difference]: Start difference. First operand 61420 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 14:20:32,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:32,627 INFO L93 Difference]: Finished difference Result 61772 states and 135959 transitions. [2021-01-26 14:20:32,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-26 14:20:32,629 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 14:20:32,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:32,743 INFO L225 Difference]: With dead ends: 61772 [2021-01-26 14:20:32,743 INFO L226 Difference]: Without dead ends: 61620 [2021-01-26 14:20:32,743 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=414, Invalid=1478, Unknown=0, NotChecked=0, Total=1892 [2021-01-26 14:20:32,747 INFO L78 Accepts]: Start accepts. Automaton has 61620 states. Word has length 58 [2021-01-26 14:20:32,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:32,748 INFO L481 AbstractCegarLoop]: Abstraction has 61620 states. [2021-01-26 14:20:32,748 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 14:20:32,748 INFO L276 IsEmpty]: Start isEmpty. Operand 61620 states. [2021-01-26 14:20:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:32,799 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:32,800 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 14:20:33,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-01-26 14:20:33,012 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:33,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:33,013 INFO L82 PathProgramCache]: Analyzing trace with hash 384183672, now seen corresponding path program 84 times [2021-01-26 14:20:33,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:33,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482379297] [2021-01-26 14:20:33,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:33,310 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 14:20:33,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482379297] [2021-01-26 14:20:33,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463169690] [2021-01-26 14:20:33,311 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 14:20:33,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:20:33,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:20:33,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:20:33,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:33,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:33,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:33,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:33,949 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 14:20:33,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:33,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:20:33,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370389835] [2021-01-26 14:20:33,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:20:33,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:33,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:20:33,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:20:33,952 INFO L87 Difference]: Start difference. First operand 61620 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 14:20:36,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:36,001 INFO L93 Difference]: Finished difference Result 61972 states and 136359 transitions. [2021-01-26 14:20:36,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-26 14:20:36,002 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 14:20:36,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:36,098 INFO L225 Difference]: With dead ends: 61972 [2021-01-26 14:20:36,098 INFO L226 Difference]: Without dead ends: 61820 [2021-01-26 14:20:36,098 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2021-01-26 14:20:36,098 INFO L78 Accepts]: Start accepts. Automaton has 61820 states. Word has length 58 [2021-01-26 14:20:36,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:36,099 INFO L481 AbstractCegarLoop]: Abstraction has 61820 states. [2021-01-26 14:20:36,099 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 14:20:36,099 INFO L276 IsEmpty]: Start isEmpty. Operand 61820 states. [2021-01-26 14:20:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:36,139 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:36,139 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 14:20:36,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:20:36,353 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:36,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:36,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1097274800, now seen corresponding path program 85 times [2021-01-26 14:20:36,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:36,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642964335] [2021-01-26 14:20:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:36,608 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 14:20:36,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642964335] [2021-01-26 14:20:36,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692697984] [2021-01-26 14:20:36,609 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 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 14:20:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:36,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:20:36,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:37,034 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:37,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:37,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:37,120 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 14:20:37,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:37,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:20:37,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933506041] [2021-01-26 14:20:37,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:20:37,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:37,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:20:37,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:20:37,121 INFO L87 Difference]: Start difference. First operand 61820 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 14:20:38,233 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-01-26 14:20:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:39,564 INFO L93 Difference]: Finished difference Result 62172 states and 136759 transitions. [2021-01-26 14:20:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-26 14:20:39,565 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 14:20:39,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:39,677 INFO L225 Difference]: With dead ends: 62172 [2021-01-26 14:20:39,677 INFO L226 Difference]: Without dead ends: 62020 [2021-01-26 14:20:39,677 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=646, Invalid=2216, Unknown=0, NotChecked=0, Total=2862 [2021-01-26 14:20:39,677 INFO L78 Accepts]: Start accepts. Automaton has 62020 states. Word has length 58 [2021-01-26 14:20:39,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:39,678 INFO L481 AbstractCegarLoop]: Abstraction has 62020 states. [2021-01-26 14:20:39,678 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 14:20:39,678 INFO L276 IsEmpty]: Start isEmpty. Operand 62020 states. [2021-01-26 14:20:39,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:39,724 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:39,724 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 14:20:39,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-01-26 14:20:39,929 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:39,929 INFO L82 PathProgramCache]: Analyzing trace with hash 669157334, now seen corresponding path program 86 times [2021-01-26 14:20:39,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:39,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595772606] [2021-01-26 14:20:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:40,213 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 14:20:40,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595772606] [2021-01-26 14:20:40,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788497173] [2021-01-26 14:20:40,213 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 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 14:20:40,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:20:40,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:20:40,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:20:40,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:40,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:20:40,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:40,838 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 14:20:40,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:40,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:20:40,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000758489] [2021-01-26 14:20:40,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:20:40,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:40,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:20:40,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:20:40,840 INFO L87 Difference]: Start difference. First operand 62020 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 14:20:43,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:43,973 INFO L93 Difference]: Finished difference Result 65184 states and 143737 transitions. [2021-01-26 14:20:43,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-26 14:20:43,974 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 14:20:43,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:44,096 INFO L225 Difference]: With dead ends: 65184 [2021-01-26 14:20:44,096 INFO L226 Difference]: Without dead ends: 64820 [2021-01-26 14:20:44,097 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=929, Invalid=3361, Unknown=0, NotChecked=0, Total=4290 [2021-01-26 14:20:44,097 INFO L78 Accepts]: Start accepts. Automaton has 64820 states. Word has length 58 [2021-01-26 14:20:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:44,097 INFO L481 AbstractCegarLoop]: Abstraction has 64820 states. [2021-01-26 14:20:44,097 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 14:20:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 64820 states. [2021-01-26 14:20:44,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:44,148 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:44,148 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 14:20:44,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:20:44,362 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:44,363 INFO L82 PathProgramCache]: Analyzing trace with hash 779504368, now seen corresponding path program 87 times [2021-01-26 14:20:44,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:44,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738899931] [2021-01-26 14:20:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:44,631 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 14:20:44,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738899931] [2021-01-26 14:20:44,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843269845] [2021-01-26 14:20:44,632 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 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 14:20:44,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:20:44,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:20:44,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:20:44,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:44,947 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-01-26 14:20:45,476 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:45,489 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 14:20:45,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:45,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:20:45,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847128867] [2021-01-26 14:20:45,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:20:45,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:45,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:20:45,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:20:45,491 INFO L87 Difference]: Start difference. First operand 64820 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 14:20:47,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:47,293 INFO L93 Difference]: Finished difference Result 65612 states and 144399 transitions. [2021-01-26 14:20:47,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-26 14:20:47,294 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 14:20:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:47,416 INFO L225 Difference]: With dead ends: 65612 [2021-01-26 14:20:47,416 INFO L226 Difference]: Without dead ends: 65460 [2021-01-26 14:20:47,417 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=463, Invalid=1517, Unknown=0, NotChecked=0, Total=1980 [2021-01-26 14:20:47,417 INFO L78 Accepts]: Start accepts. Automaton has 65460 states. Word has length 58 [2021-01-26 14:20:47,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:47,417 INFO L481 AbstractCegarLoop]: Abstraction has 65460 states. [2021-01-26 14:20:47,417 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 14:20:47,418 INFO L276 IsEmpty]: Start isEmpty. Operand 65460 states. [2021-01-26 14:20:47,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:47,470 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:47,471 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 14:20:47,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-01-26 14:20:47,686 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:47,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:47,686 INFO L82 PathProgramCache]: Analyzing trace with hash -973248368, now seen corresponding path program 88 times [2021-01-26 14:20:47,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:47,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728252628] [2021-01-26 14:20:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:47,969 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 14:20:47,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728252628] [2021-01-26 14:20:47,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919057574] [2021-01-26 14:20:47,971 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 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 14:20:48,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:20:48,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:20:48,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:20:48,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:48,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:48,580 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-01-26 14:20:48,597 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 14:20:48,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:48,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:20:48,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837819377] [2021-01-26 14:20:48,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:20:48,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:48,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:20:48,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:20:48,600 INFO L87 Difference]: Start difference. First operand 65460 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 14:20:50,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:50,516 INFO L93 Difference]: Finished difference Result 65852 states and 144879 transitions. [2021-01-26 14:20:50,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-26 14:20:50,518 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 14:20:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:50,626 INFO L225 Difference]: With dead ends: 65852 [2021-01-26 14:20:50,626 INFO L226 Difference]: Without dead ends: 65700 [2021-01-26 14:20:50,627 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:20:50,627 INFO L78 Accepts]: Start accepts. Automaton has 65700 states. Word has length 58 [2021-01-26 14:20:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:50,627 INFO L481 AbstractCegarLoop]: Abstraction has 65700 states. [2021-01-26 14:20:50,627 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 14:20:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 65700 states. [2021-01-26 14:20:50,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:50,861 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:50,861 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 14:20:51,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:20:51,074 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:51,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:51,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1142254788, now seen corresponding path program 89 times [2021-01-26 14:20:51,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:51,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490659946] [2021-01-26 14:20:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:51,332 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 14:20:51,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490659946] [2021-01-26 14:20:51,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21495694] [2021-01-26 14:20:51,333 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 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 14:20:51,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:20:51,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:20:51,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:20:51,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:51,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:51,718 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 14:20:51,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:51,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:20:51,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145899242] [2021-01-26 14:20:51,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:20:51,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:51,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:20:51,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:20:51,720 INFO L87 Difference]: Start difference. First operand 65700 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 14:20:53,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:53,748 INFO L93 Difference]: Finished difference Result 66972 states and 147119 transitions. [2021-01-26 14:20:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-26 14:20:53,750 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 14:20:53,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:53,869 INFO L225 Difference]: With dead ends: 66972 [2021-01-26 14:20:53,869 INFO L226 Difference]: Without dead ends: 66820 [2021-01-26 14:20:53,870 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2021-01-26 14:20:53,870 INFO L78 Accepts]: Start accepts. Automaton has 66820 states. Word has length 58 [2021-01-26 14:20:53,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:53,870 INFO L481 AbstractCegarLoop]: Abstraction has 66820 states. [2021-01-26 14:20:53,870 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 14:20:53,870 INFO L276 IsEmpty]: Start isEmpty. Operand 66820 states. [2021-01-26 14:20:53,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:53,929 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:53,930 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 14:20:54,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:20:54,143 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:54,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:54,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1898255560, now seen corresponding path program 90 times [2021-01-26 14:20:54,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:54,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592609282] [2021-01-26 14:20:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:54,412 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 14:20:54,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592609282] [2021-01-26 14:20:54,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747110346] [2021-01-26 14:20:54,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:20:54,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:20:54,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:20:54,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:20:54,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:54,765 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:20:54,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:54,843 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 14:20:54,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:54,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:20:54,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027705610] [2021-01-26 14:20:54,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:20:54,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:54,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:20:54,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:20:54,845 INFO L87 Difference]: Start difference. First operand 66820 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 14:20:57,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:20:57,696 INFO L93 Difference]: Finished difference Result 69664 states and 153457 transitions. [2021-01-26 14:20:57,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-26 14:20:57,698 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 14:20:57,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:20:57,790 INFO L225 Difference]: With dead ends: 69664 [2021-01-26 14:20:57,790 INFO L226 Difference]: Without dead ends: 69300 [2021-01-26 14:20:57,791 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=801, Invalid=2621, Unknown=0, NotChecked=0, Total=3422 [2021-01-26 14:20:57,791 INFO L78 Accepts]: Start accepts. Automaton has 69300 states. Word has length 58 [2021-01-26 14:20:57,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:20:57,791 INFO L481 AbstractCegarLoop]: Abstraction has 69300 states. [2021-01-26 14:20:57,791 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 14:20:57,791 INFO L276 IsEmpty]: Start isEmpty. Operand 69300 states. [2021-01-26 14:20:58,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:20:58,052 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:20:58,052 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 14:20:58,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-01-26 14:20:58,265 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:20:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:20:58,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1843980886, now seen corresponding path program 91 times [2021-01-26 14:20:58,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:20:58,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621897549] [2021-01-26 14:20:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:20:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:58,530 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 14:20:58,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621897549] [2021-01-26 14:20:58,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084030459] [2021-01-26 14:20:58,531 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:20:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:20:58,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:20:58,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:20:58,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:20:59,038 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 14:20:59,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:20:59,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:20:59,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327300215] [2021-01-26 14:20:59,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:20:59,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:20:59,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:20:59,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:20:59,040 INFO L87 Difference]: Start difference. First operand 69300 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 14:21:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:01,527 INFO L93 Difference]: Finished difference Result 69692 states and 153319 transitions. [2021-01-26 14:21:01,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-26 14:21:01,529 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 14:21:01,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:01,664 INFO L225 Difference]: With dead ends: 69692 [2021-01-26 14:21:01,664 INFO L226 Difference]: Without dead ends: 69540 [2021-01-26 14:21:01,664 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2021-01-26 14:21:01,664 INFO L78 Accepts]: Start accepts. Automaton has 69540 states. Word has length 58 [2021-01-26 14:21:01,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:01,665 INFO L481 AbstractCegarLoop]: Abstraction has 69540 states. [2021-01-26 14:21:01,665 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 14:21:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 69540 states. [2021-01-26 14:21:01,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:21:01,719 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:01,719 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 14:21:01,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-01-26 14:21:01,933 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:01,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:01,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2022868944, now seen corresponding path program 92 times [2021-01-26 14:21:01,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:01,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105756989] [2021-01-26 14:21:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:02,206 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 14:21:02,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105756989] [2021-01-26 14:21:02,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838404639] [2021-01-26 14:21:02,207 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:02,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:21:02,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:02,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:21:02,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:02,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:21:02,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:02,555 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 14:21:02,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:02,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:21:02,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990668944] [2021-01-26 14:21:02,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:21:02,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:02,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:21:02,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:21:02,562 INFO L87 Difference]: Start difference. First operand 69540 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 14:21:03,410 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2021-01-26 14:21:05,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:05,992 INFO L93 Difference]: Finished difference Result 72194 states and 159182 transitions. [2021-01-26 14:21:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-26 14:21:05,994 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 14:21:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:06,102 INFO L225 Difference]: With dead ends: 72194 [2021-01-26 14:21:06,103 INFO L226 Difference]: Without dead ends: 71830 [2021-01-26 14:21:06,103 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1444 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=989, Invalid=3301, Unknown=0, NotChecked=0, Total=4290 [2021-01-26 14:21:06,103 INFO L78 Accepts]: Start accepts. Automaton has 71830 states. Word has length 58 [2021-01-26 14:21:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:06,105 INFO L481 AbstractCegarLoop]: Abstraction has 71830 states. [2021-01-26 14:21:06,105 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 14:21:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 71830 states. [2021-01-26 14:21:06,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:21:06,170 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:06,170 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 14:21:06,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:06,384 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:06,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:06,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1735535381, now seen corresponding path program 9 times [2021-01-26 14:21:06,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:06,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022536082] [2021-01-26 14:21:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:06,679 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 14:21:06,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022536082] [2021-01-26 14:21:06,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30163285] [2021-01-26 14:21:06,680 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:06,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-26 14:21:06,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:06,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-26 14:21:06,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:06,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:06,837 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 14:21:06,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:06,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-01-26 14:21:06,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082334472] [2021-01-26 14:21:06,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:21:06,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:21:06,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:21:06,838 INFO L87 Difference]: Start difference. First operand 71830 states. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 14:21:07,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:07,755 INFO L93 Difference]: Finished difference Result 72022 states and 158644 transitions. [2021-01-26 14:21:07,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-26 14:21:07,757 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 14:21:07,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:07,872 INFO L225 Difference]: With dead ends: 72022 [2021-01-26 14:21:07,872 INFO L226 Difference]: Without dead ends: 71870 [2021-01-26 14:21:07,872 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-01-26 14:21:07,872 INFO L78 Accepts]: Start accepts. Automaton has 71870 states. Word has length 63 [2021-01-26 14:21:07,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:07,873 INFO L481 AbstractCegarLoop]: Abstraction has 71870 states. [2021-01-26 14:21:07,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 14:21:07,873 INFO L276 IsEmpty]: Start isEmpty. Operand 71870 states. [2021-01-26 14:21:07,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:21:07,941 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:07,943 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 14:21:08,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-01-26 14:21:08,156 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:08,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:08,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1555465405, now seen corresponding path program 10 times [2021-01-26 14:21:08,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:08,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511231545] [2021-01-26 14:21:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:08,487 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 14:21:08,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511231545] [2021-01-26 14:21:08,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907042192] [2021-01-26 14:21:08,488 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:08,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:21:08,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:08,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:21:08,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:08,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:21:09,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:09,055 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 14:21:09,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:09,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:21:09,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116718084] [2021-01-26 14:21:09,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:21:09,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:09,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:21:09,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:21:09,057 INFO L87 Difference]: Start difference. First operand 71870 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 14:21:09,901 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2021-01-26 14:21:11,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:11,189 INFO L93 Difference]: Finished difference Result 72910 states and 160932 transitions. [2021-01-26 14:21:11,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-26 14:21:11,191 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 14:21:11,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:11,280 INFO L225 Difference]: With dead ends: 72910 [2021-01-26 14:21:11,281 INFO L226 Difference]: Without dead ends: 72370 [2021-01-26 14:21:11,281 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=482, Invalid=1870, Unknown=0, NotChecked=0, Total=2352 [2021-01-26 14:21:11,281 INFO L78 Accepts]: Start accepts. Automaton has 72370 states. Word has length 63 [2021-01-26 14:21:11,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:11,281 INFO L481 AbstractCegarLoop]: Abstraction has 72370 states. [2021-01-26 14:21:11,281 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 14:21:11,281 INFO L276 IsEmpty]: Start isEmpty. Operand 72370 states. [2021-01-26 14:21:11,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:21:11,340 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:11,340 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 14:21:11,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-01-26 14:21:11,541 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:11,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:11,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1241373133, now seen corresponding path program 93 times [2021-01-26 14:21:11,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:11,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130275999] [2021-01-26 14:21:11,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:11,803 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 14:21:11,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130275999] [2021-01-26 14:21:11,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665589317] [2021-01-26 14:21:11,969 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:12,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-26 14:21:12,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:12,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:21:12,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:12,535 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:12,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:12,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:12,615 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 14:21:12,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:12,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:21:12,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159992176] [2021-01-26 14:21:12,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:21:12,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:12,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:21:12,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:21:12,619 INFO L87 Difference]: Start difference. First operand 72370 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 14:21:14,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:14,535 INFO L93 Difference]: Finished difference Result 72682 states and 160154 transitions. [2021-01-26 14:21:14,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-26 14:21:14,537 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 14:21:14,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:14,669 INFO L225 Difference]: With dead ends: 72682 [2021-01-26 14:21:14,669 INFO L226 Difference]: Without dead ends: 72530 [2021-01-26 14:21:14,670 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=371, Invalid=1269, Unknown=0, NotChecked=0, Total=1640 [2021-01-26 14:21:14,670 INFO L78 Accepts]: Start accepts. Automaton has 72530 states. Word has length 63 [2021-01-26 14:21:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:14,670 INFO L481 AbstractCegarLoop]: Abstraction has 72530 states. [2021-01-26 14:21:14,670 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 14:21:14,670 INFO L276 IsEmpty]: Start isEmpty. Operand 72530 states. [2021-01-26 14:21:14,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:21:14,748 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:14,748 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 14:21:14,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-01-26 14:21:14,962 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:14,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:14,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1784254887, now seen corresponding path program 94 times [2021-01-26 14:21:14,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:14,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979556253] [2021-01-26 14:21:14,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:15,262 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 14:21:15,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979556253] [2021-01-26 14:21:15,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212306379] [2021-01-26 14:21:15,263 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:15,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:21:15,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:15,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:21:15,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:15,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:15,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:15,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:15,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:15,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:15,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:15,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:15,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:15,897 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 14:21:15,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:15,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:21:15,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567102137] [2021-01-26 14:21:15,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:21:15,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:15,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:21:15,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:21:15,899 INFO L87 Difference]: Start difference. First operand 72530 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 14:21:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:17,889 INFO L93 Difference]: Finished difference Result 72842 states and 160474 transitions. [2021-01-26 14:21:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-26 14:21:17,891 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 14:21:17,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:18,020 INFO L225 Difference]: With dead ends: 72842 [2021-01-26 14:21:18,020 INFO L226 Difference]: Without dead ends: 72690 [2021-01-26 14:21:18,021 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=412, Invalid=1568, Unknown=0, NotChecked=0, Total=1980 [2021-01-26 14:21:18,021 INFO L78 Accepts]: Start accepts. Automaton has 72690 states. Word has length 63 [2021-01-26 14:21:18,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:18,021 INFO L481 AbstractCegarLoop]: Abstraction has 72690 states. [2021-01-26 14:21:18,021 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 14:21:18,021 INFO L276 IsEmpty]: Start isEmpty. Operand 72690 states. [2021-01-26 14:21:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:21:18,106 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:18,106 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 14:21:18,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:18,320 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:18,321 INFO L82 PathProgramCache]: Analyzing trace with hash -788631545, now seen corresponding path program 95 times [2021-01-26 14:21:18,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:18,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010405193] [2021-01-26 14:21:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:18,582 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 14:21:18,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010405193] [2021-01-26 14:21:18,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723352739] [2021-01-26 14:21:18,583 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:18,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-26 14:21:18,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:18,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:21:18,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:19,098 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:19,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:19,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:19,314 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-01-26 14:21:19,336 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 14:21:19,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:19,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:21:19,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763634076] [2021-01-26 14:21:19,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:21:19,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:19,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:21:19,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:21:19,337 INFO L87 Difference]: Start difference. First operand 72690 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 14:21:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:21,621 INFO L93 Difference]: Finished difference Result 72882 states and 160554 transitions. [2021-01-26 14:21:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-26 14:21:21,623 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 14:21:21,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:21,935 INFO L225 Difference]: With dead ends: 72882 [2021-01-26 14:21:21,935 INFO L226 Difference]: Without dead ends: 72730 [2021-01-26 14:21:21,935 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=499, Invalid=1757, Unknown=0, NotChecked=0, Total=2256 [2021-01-26 14:21:21,936 INFO L78 Accepts]: Start accepts. Automaton has 72730 states. Word has length 63 [2021-01-26 14:21:21,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:21,936 INFO L481 AbstractCegarLoop]: Abstraction has 72730 states. [2021-01-26 14:21:21,936 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 14:21:21,936 INFO L276 IsEmpty]: Start isEmpty. Operand 72730 states. [2021-01-26 14:21:22,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:21:22,007 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:22,007 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 14:21:22,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-01-26 14:21:22,220 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:22,221 INFO L82 PathProgramCache]: Analyzing trace with hash -32630773, now seen corresponding path program 96 times [2021-01-26 14:21:22,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:22,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441784071] [2021-01-26 14:21:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:22,638 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 14:21:22,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441784071] [2021-01-26 14:21:22,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156630045] [2021-01-26 14:21:22,639 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:22,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-26 14:21:22,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:22,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:21:22,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:23,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:21:23,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:23,519 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 14:21:23,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:23,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:21:23,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217491835] [2021-01-26 14:21:23,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:21:23,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:23,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:21:23,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:21:23,521 INFO L87 Difference]: Start difference. First operand 72730 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 14:22:44,792 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 24 [2021-01-26 14:22:44,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:22:44,838 INFO L93 Difference]: Finished difference Result 74770 states and 164842 transitions. [2021-01-26 14:22:44,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-26 14:22:44,840 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 14:22:44,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:22:44,946 INFO L225 Difference]: With dead ends: 74770 [2021-01-26 14:22:44,946 INFO L226 Difference]: Without dead ends: 74230 [2021-01-26 14:22:44,947 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=831, Invalid=3194, Unknown=7, NotChecked=0, Total=4032 [2021-01-26 14:22:44,948 INFO L78 Accepts]: Start accepts. Automaton has 74230 states. Word has length 63 [2021-01-26 14:22:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:22:44,948 INFO L481 AbstractCegarLoop]: Abstraction has 74230 states. [2021-01-26 14:22:44,948 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 14:22:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 74230 states. [2021-01-26 14:22:45,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:22:45,173 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:22:45,174 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 14:22:45,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-01-26 14:22:45,387 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:22:45,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:22:45,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1863343861, now seen corresponding path program 97 times [2021-01-26 14:22:45,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:22:45,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340529255] [2021-01-26 14:22:45,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:22:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:22:45,741 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 14:22:45,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340529255] [2021-01-26 14:22:45,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881720128] [2021-01-26 14:22:45,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:22:45,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:22:45,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:22:54,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:22:54,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:22:54,527 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 14:22:54,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:22:54,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:22:54,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051486069] [2021-01-26 14:22:54,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:22:54,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:22:54,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:22:54,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=408, Unknown=4, NotChecked=0, Total=506 [2021-01-26 14:22:54,529 INFO L87 Difference]: Start difference. First operand 74230 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 14:22:56,877 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-01-26 14:22:57,218 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 13 [2021-01-26 14:23:04,005 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 38 [2021-01-26 14:23:05,405 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 13 [2021-01-26 14:23:11,245 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 36 [2021-01-26 14:23:16,772 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 34 [2021-01-26 14:23:16,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:23:16,953 INFO L93 Difference]: Finished difference Result 74542 states and 164064 transitions. [2021-01-26 14:23:16,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-26 14:23:16,954 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 14:23:16,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:23:17,051 INFO L225 Difference]: With dead ends: 74542 [2021-01-26 14:23:17,051 INFO L226 Difference]: Without dead ends: 74390 [2021-01-26 14:23:17,051 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=428, Invalid=1374, Unknown=4, NotChecked=0, Total=1806 [2021-01-26 14:23:17,051 INFO L78 Accepts]: Start accepts. Automaton has 74390 states. Word has length 63 [2021-01-26 14:23:17,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:23:17,051 INFO L481 AbstractCegarLoop]: Abstraction has 74390 states. [2021-01-26 14:23:17,052 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 14:23:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand 74390 states. [2021-01-26 14:23:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:23:17,115 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:23:17,115 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:23:17,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:17,315 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:23:17,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:23:17,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1592421991, now seen corresponding path program 98 times [2021-01-26 14:23:17,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:23:17,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344922280] [2021-01-26 14:23:17,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:23:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:17,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344922280] [2021-01-26 14:23:17,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371933480] [2021-01-26 14:23:17,672 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:17,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:23:17,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:23:17,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:23:17,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:23:18,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:18,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:23:18,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:23:18,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277447315] [2021-01-26 14:23:18,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:23:18,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:23:18,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:23:18,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:23:18,516 INFO L87 Difference]: Start difference. First operand 74390 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 14:23:19,261 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-01-26 14:23:26,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:23:26,431 INFO L93 Difference]: Finished difference Result 74950 states and 164944 transitions. [2021-01-26 14:23:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-26 14:23:26,433 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 14:23:26,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:23:26,579 INFO L225 Difference]: With dead ends: 74950 [2021-01-26 14:23:26,580 INFO L226 Difference]: Without dead ends: 74710 [2021-01-26 14:23:26,581 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=423, Invalid=1469, Unknown=0, NotChecked=0, Total=1892 [2021-01-26 14:23:26,581 INFO L78 Accepts]: Start accepts. Automaton has 74710 states. Word has length 63 [2021-01-26 14:23:26,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:23:26,581 INFO L481 AbstractCegarLoop]: Abstraction has 74710 states. [2021-01-26 14:23:26,582 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 14:23:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 74710 states. [2021-01-26 14:23:26,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:23:26,860 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:23:26,860 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 14:23:27,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:27,077 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:23:27,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:23:27,078 INFO L82 PathProgramCache]: Analyzing trace with hash 899021825, now seen corresponding path program 99 times [2021-01-26 14:23:27,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:23:27,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513187199] [2021-01-26 14:23:27,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:23:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:27,618 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 14:23:27,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513187199] [2021-01-26 14:23:27,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044878150] [2021-01-26 14:23:27,619 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:27,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-26 14:23:27,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:23:27,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-26 14:23:27,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:23:28,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:28,174 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 14:23:28,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:23:28,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-01-26 14:23:28,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370222761] [2021-01-26 14:23:28,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:23:28,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:23:28,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:23:28,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:23:28,176 INFO L87 Difference]: Start difference. First operand 74710 states. Second operand has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 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 14:23:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:23:31,135 INFO L93 Difference]: Finished difference Result 75630 states and 166304 transitions. [2021-01-26 14:23:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-26 14:23:31,138 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 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 63 [2021-01-26 14:23:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:23:31,285 INFO L225 Difference]: With dead ends: 75630 [2021-01-26 14:23:31,285 INFO L226 Difference]: Without dead ends: 75390 [2021-01-26 14:23:31,285 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=378, Invalid=1692, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:23:31,285 INFO L78 Accepts]: Start accepts. Automaton has 75390 states. Word has length 63 [2021-01-26 14:23:31,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:23:31,286 INFO L481 AbstractCegarLoop]: Abstraction has 75390 states. [2021-01-26 14:23:31,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 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 14:23:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 75390 states. [2021-01-26 14:23:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:23:31,367 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:23:31,367 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:23:31,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:31,580 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:23:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:23:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash 628099955, now seen corresponding path program 100 times [2021-01-26 14:23:31,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:23:31,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370531499] [2021-01-26 14:23:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:23:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:31,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370531499] [2021-01-26 14:23:31,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596393651] [2021-01-26 14:23:31,935 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:31,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:23:31,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:23:31,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:23:31,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:23:32,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:33,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:23:33,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:23:33,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087995912] [2021-01-26 14:23:33,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:23:33,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:23:33,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:23:33,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:23:33,101 INFO L87 Difference]: Start difference. First operand 75390 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 14:23:44,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:23:44,152 INFO L93 Difference]: Finished difference Result 75830 states and 166704 transitions. [2021-01-26 14:23:44,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-26 14:23:44,154 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 14:23:44,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:23:44,240 INFO L225 Difference]: With dead ends: 75830 [2021-01-26 14:23:44,240 INFO L226 Difference]: Without dead ends: 75590 [2021-01-26 14:23:44,240 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=489, Invalid=1863, Unknown=0, NotChecked=0, Total=2352 [2021-01-26 14:23:44,240 INFO L78 Accepts]: Start accepts. Automaton has 75590 states. Word has length 63 [2021-01-26 14:23:44,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:23:44,240 INFO L481 AbstractCegarLoop]: Abstraction has 75590 states. [2021-01-26 14:23:44,240 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 14:23:44,241 INFO L276 IsEmpty]: Start isEmpty. Operand 75590 states. [2021-01-26 14:23:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:23:44,294 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:23:44,294 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 14:23:44,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:44,495 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:23:44,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:23:44,496 INFO L82 PathProgramCache]: Analyzing trace with hash -853730911, now seen corresponding path program 101 times [2021-01-26 14:23:44,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:23:44,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660083741] [2021-01-26 14:23:44,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:23:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:44,785 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 14:23:44,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660083741] [2021-01-26 14:23:44,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319309142] [2021-01-26 14:23:44,786 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:44,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-26 14:23:44,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:23:44,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:23:44,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:23:45,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:45,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:45,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:45,494 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 14:23:45,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:23:45,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:23:45,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323418862] [2021-01-26 14:23:45,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:23:45,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:23:45,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:23:45,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:23:45,496 INFO L87 Difference]: Start difference. First operand 75590 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 14:23:46,994 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2021-01-26 14:23:49,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:23:49,083 INFO L93 Difference]: Finished difference Result 75782 states and 166544 transitions. [2021-01-26 14:23:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-26 14:23:49,086 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 14:23:49,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:23:49,234 INFO L225 Difference]: With dead ends: 75782 [2021-01-26 14:23:49,234 INFO L226 Difference]: Without dead ends: 75630 [2021-01-26 14:23:49,234 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=624, Invalid=2238, Unknown=0, NotChecked=0, Total=2862 [2021-01-26 14:23:49,235 INFO L78 Accepts]: Start accepts. Automaton has 75630 states. Word has length 63 [2021-01-26 14:23:49,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:23:49,235 INFO L481 AbstractCegarLoop]: Abstraction has 75630 states. [2021-01-26 14:23:49,235 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 14:23:49,235 INFO L276 IsEmpty]: Start isEmpty. Operand 75630 states. [2021-01-26 14:23:49,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:23:49,325 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:23:49,325 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 14:23:49,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-01-26 14:23:49,539 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:23:49,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:23:49,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1505154611, now seen corresponding path program 102 times [2021-01-26 14:23:49,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:23:49,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374887431] [2021-01-26 14:23:49,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:23:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:50,119 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 14:23:50,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374887431] [2021-01-26 14:23:50,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208211610] [2021-01-26 14:23:50,120 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:50,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-26 14:23:50,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:23:50,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:23:50,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:23:51,007 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:51,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:51,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:51,141 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 14:23:51,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:23:51,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:23:51,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127611522] [2021-01-26 14:23:51,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:23:51,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:23:51,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:23:51,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:23:51,143 INFO L87 Difference]: Start difference. First operand 75630 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 14:23:55,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:23:55,304 INFO L93 Difference]: Finished difference Result 75822 states and 166624 transitions. [2021-01-26 14:23:55,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-26 14:23:55,306 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 14:23:55,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:23:55,452 INFO L225 Difference]: With dead ends: 75822 [2021-01-26 14:23:55,452 INFO L226 Difference]: Without dead ends: 75670 [2021-01-26 14:23:55,453 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=682, Invalid=2288, Unknown=0, NotChecked=0, Total=2970 [2021-01-26 14:23:55,453 INFO L78 Accepts]: Start accepts. Automaton has 75670 states. Word has length 63 [2021-01-26 14:23:55,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:23:55,453 INFO L481 AbstractCegarLoop]: Abstraction has 75670 states. [2021-01-26 14:23:55,453 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 14:23:55,453 INFO L276 IsEmpty]: Start isEmpty. Operand 75670 states. [2021-01-26 14:23:55,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:23:55,540 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:23:55,541 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 14:23:55,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-01-26 14:23:55,754 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:23:55,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:23:55,755 INFO L82 PathProgramCache]: Analyzing trace with hash -749153839, now seen corresponding path program 103 times [2021-01-26 14:23:55,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:23:55,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820695943] [2021-01-26 14:23:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:23:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:56,156 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 14:23:56,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820695943] [2021-01-26 14:23:56,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473726223] [2021-01-26 14:23:56,157 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:56,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:23:56,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:23:59,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:59,517 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-01-26 14:23:59,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:59,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:23:59,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:23:59,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:23:59,645 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 14:23:59,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:23:59,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:23:59,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954570438] [2021-01-26 14:23:59,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:23:59,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:23:59,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:23:59,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=384, Unknown=1, NotChecked=0, Total=506 [2021-01-26 14:23:59,766 INFO L87 Difference]: Start difference. First operand 75670 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 14:24:00,855 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 17 [2021-01-26 14:24:02,906 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 54 DAG size of output: 20 [2021-01-26 14:24:05,084 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 58 DAG size of output: 20 [2021-01-26 14:24:15,359 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 47 [2021-01-26 14:24:28,674 WARN L193 SmtUtils]: Spent 6.12 s on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-01-26 14:24:36,028 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-01-26 14:25:03,151 WARN L193 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-01-26 14:25:22,506 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 36 [2021-01-26 14:25:41,910 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-01-26 14:26:25,201 WARN L193 SmtUtils]: Spent 2.76 s on a formula simplification. DAG size of input: 51 DAG size of output: 22 [2021-01-26 14:26:57,807 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-01-26 14:27:18,554 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-01-26 14:28:08,624 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 38 [2021-01-26 14:28:17,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:28:17,417 INFO L93 Difference]: Finished difference Result 78297 states and 172268 transitions. [2021-01-26 14:28:17,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-26 14:28:17,419 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 14:28:17,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:28:17,518 INFO L225 Difference]: With dead ends: 78297 [2021-01-26 14:28:17,518 INFO L226 Difference]: Without dead ends: 77933 [2021-01-26 14:28:17,519 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 108.7s TimeCoverageRelationStatistics Valid=1013, Invalid=3659, Unknown=20, NotChecked=0, Total=4692 [2021-01-26 14:28:17,519 INFO L78 Accepts]: Start accepts. Automaton has 77933 states. Word has length 63 [2021-01-26 14:28:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:28:17,519 INFO L481 AbstractCegarLoop]: Abstraction has 77933 states. [2021-01-26 14:28:17,519 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 14:28:17,520 INFO L276 IsEmpty]: Start isEmpty. Operand 77933 states. [2021-01-26 14:28:17,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:28:17,591 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:28:17,591 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:28:17,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-01-26 14:28:17,792 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:28:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:28:17,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1259088443, now seen corresponding path program 104 times [2021-01-26 14:28:17,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:28:17,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076663162] [2021-01-26 14:28:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:28:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:28:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:18,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076663162] [2021-01-26 14:28:18,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383729044] [2021-01-26 14:28:18,174 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:28:18,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:28:18,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:28:18,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:28:18,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:28:18,816 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-01-26 14:28:19,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:19,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:28:19,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:28:19,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923641961] [2021-01-26 14:28:19,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:28:19,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:28:19,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:28:19,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:28:19,426 INFO L87 Difference]: Start difference. First operand 77933 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 14:28:23,070 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 15 [2021-01-26 14:28:23,971 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-01-26 14:28:25,258 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-01-26 14:28:27,566 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 43 [2021-01-26 14:28:33,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:28:33,616 INFO L93 Difference]: Finished difference Result 78613 states and 172770 transitions. [2021-01-26 14:28:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-26 14:28:33,620 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 14:28:33,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:28:33,751 INFO L225 Difference]: With dead ends: 78613 [2021-01-26 14:28:33,751 INFO L226 Difference]: Without dead ends: 78373 [2021-01-26 14:28:33,752 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=694, Invalid=2612, Unknown=0, NotChecked=0, Total=3306 [2021-01-26 14:28:33,752 INFO L78 Accepts]: Start accepts. Automaton has 78373 states. Word has length 63 [2021-01-26 14:28:33,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:28:33,752 INFO L481 AbstractCegarLoop]: Abstraction has 78373 states. [2021-01-26 14:28:33,753 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 14:28:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 78373 states. [2021-01-26 14:28:33,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:28:33,829 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:28:33,829 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:28:34,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:28:34,047 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:28:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:28:34,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1313797989, now seen corresponding path program 105 times [2021-01-26 14:28:34,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:28:34,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440506007] [2021-01-26 14:28:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:28:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:28:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:34,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440506007] [2021-01-26 14:28:34,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309203011] [2021-01-26 14:28:34,585 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:28:34,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-26 14:28:34,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:28:34,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-26 14:28:34,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:28:35,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:28:35,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:35,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:28:35,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-01-26 14:28:35,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260864139] [2021-01-26 14:28:35,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:28:35,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:28:35,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:28:35,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:28:35,184 INFO L87 Difference]: Start difference. First operand 78373 states. Second operand has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 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 14:28:36,254 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-01-26 14:28:38,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:28:38,865 INFO L93 Difference]: Finished difference Result 78685 states and 172850 transitions. [2021-01-26 14:28:38,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-26 14:28:38,869 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 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 63 [2021-01-26 14:28:38,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:28:38,989 INFO L225 Difference]: With dead ends: 78685 [2021-01-26 14:28:38,990 INFO L226 Difference]: Without dead ends: 78533 [2021-01-26 14:28:38,990 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=483, Invalid=1773, Unknown=0, NotChecked=0, Total=2256 [2021-01-26 14:28:38,990 INFO L78 Accepts]: Start accepts. Automaton has 78533 states. Word has length 63 [2021-01-26 14:28:38,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:28:38,991 INFO L481 AbstractCegarLoop]: Abstraction has 78533 states. [2021-01-26 14:28:38,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 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 14:28:38,991 INFO L276 IsEmpty]: Start isEmpty. Operand 78533 states. [2021-01-26 14:28:39,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:28:39,310 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:28:39,310 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:28:39,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-01-26 14:28:39,520 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:28:39,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:28:39,521 INFO L82 PathProgramCache]: Analyzing trace with hash -557797217, now seen corresponding path program 106 times [2021-01-26 14:28:39,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:28:39,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765300693] [2021-01-26 14:28:39,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:28:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:28:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:39,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765300693] [2021-01-26 14:28:39,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088567055] [2021-01-26 14:28:39,946 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:28:40,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:28:40,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:28:40,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:28:40,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:28:44,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:45,020 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-01-26 14:28:45,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:45,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:28:45,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:28:45,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849055310] [2021-01-26 14:28:45,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:28:45,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:28:45,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:28:45,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=388, Unknown=2, NotChecked=0, Total=506 [2021-01-26 14:28:45,084 INFO L87 Difference]: Start difference. First operand 78533 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 14:28:46,231 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 19 [2021-01-26 14:28:46,632 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 15 [2021-01-26 14:28:46,991 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 22 [2021-01-26 14:28:47,419 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 18 [2021-01-26 14:28:50,124 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 41 [2021-01-26 14:28:50,680 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2021-01-26 14:28:51,239 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-01-26 14:28:56,316 WARN L193 SmtUtils]: Spent 4.79 s on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-01-26 14:28:56,629 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 21 [2021-01-26 14:28:56,938 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-01-26 14:28:57,532 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-01-26 14:28:58,409 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-01-26 14:29:02,568 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 20 [2021-01-26 14:29:03,855 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 Received shutdown request... [2021-01-26 14:29:04,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-26 14:29:04,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:29:04,214 WARN L546 AbstractCegarLoop]: Verification canceled [2021-01-26 14:29:04,225 WARN L250 ceAbstractionStarter]: Timeout [2021-01-26 14:29:04,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.01 02:29:04 BasicIcfg [2021-01-26 14:29:04,226 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-26 14:29:04,229 INFO L168 Benchmark]: Toolchain (without parser) took 718754.32 ms. Allocated memory was 310.4 MB in the beginning and 6.3 GB in the end (delta: 6.0 GB). Free memory was 283.9 MB in the beginning and 2.3 GB in the end (delta: -2.0 GB). Peak memory consumption was 4.0 GB. Max. memory is 16.0 GB. [2021-01-26 14:29:04,230 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 310.4 MB. Free memory was 281.2 MB in the beginning and 281.2 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-01-26 14:29:04,230 INFO L168 Benchmark]: CACSL2BoogieTranslator took 713.82 ms. Allocated memory is still 310.4 MB. Free memory was 282.8 MB in the beginning and 285.7 MB in the end (delta: -2.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.0 GB. [2021-01-26 14:29:04,230 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.09 ms. Allocated memory is still 310.4 MB. Free memory was 285.7 MB in the beginning and 283.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-01-26 14:29:04,231 INFO L168 Benchmark]: Boogie Preprocessor took 29.71 ms. Allocated memory is still 310.4 MB. Free memory was 283.8 MB in the beginning and 282.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-01-26 14:29:04,231 INFO L168 Benchmark]: RCFGBuilder took 518.75 ms. Allocated memory is still 310.4 MB. Free memory was 281.7 MB in the beginning and 260.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-01-26 14:29:04,231 INFO L168 Benchmark]: TraceAbstraction took 717402.93 ms. Allocated memory was 310.4 MB in the beginning and 6.3 GB in the end (delta: 6.0 GB). Free memory was 260.7 MB in the beginning and 2.3 GB in the end (delta: -2.0 GB). Peak memory consumption was 3.9 GB. Max. memory is 16.0 GB. [2021-01-26 14:29:04,237 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 310.4 MB. Free memory was 281.2 MB in the beginning and 281.2 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 713.82 ms. Allocated memory is still 310.4 MB. Free memory was 282.8 MB in the beginning and 285.7 MB in the end (delta: -2.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 47.09 ms. Allocated memory is still 310.4 MB. Free memory was 285.7 MB in the beginning and 283.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 29.71 ms. Allocated memory is still 310.4 MB. Free memory was 283.8 MB in the beginning and 282.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 518.75 ms. Allocated memory is still 310.4 MB. Free memory was 281.7 MB in the beginning and 260.7 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 717402.93 ms. Allocated memory was 310.4 MB in the beginning and 6.3 GB in the end (delta: 6.0 GB). Free memory was 260.7 MB in the beginning and 2.3 GB in the end (delta: -2.0 GB). Peak memory consumption was 3.9 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 (78533states) and FLOYD_HOARE automaton (currently 33 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 49 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 717.2s, OverallIterations: 129, TraceHistogramMax: 6, AutomataDifference: 592.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 11693 SDtfs, 111153 SDslu, 140385 SDs, 0 SdLazy, 23740 SolverSat, 8447 SolverUnsat, 127 SolverUnknown, 0 SolverNotchecked, 276.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11155 GetRequests, 5937 SyntacticMatches, 53 SemanticMatches, 5164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69796 ImplicationChecksByTransitivity, 337.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78533occurred in iteration=128, 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, 3.5s SatisfiabilityAnalysisTime, 82.4s InterpolantComputationTime, 13853 NumberOfCodeBlocks, 13853 NumberOfCodeBlocksAsserted, 426 NumberOfCheckSat, 13602 ConstructedInterpolants, 11 QuantifiedInterpolants, 6010935 SizeOfPredicates, 501 NumberOfNonLiveVariables, 16639 ConjunctsInSsa, 1583 ConjunctsInUnsatCore, 251 InterpolantComputations, 7 PerfectInterpolantSequences, 0/4728 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 14:17:01.902 ----------------------------------------------- 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-2.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-2.i !ENTRY org.eclipse.osgi 4 0 2021-01-26 14:29:04.510 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3488aedd/.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/e3488aedd/.metadata/.log.