/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-21 21:34:00,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-21 21:34:00,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-21 21:34:00,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-21 21:34:00,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-21 21:34:00,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-21 21:34:00,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-21 21:34:00,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-21 21:34:00,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-21 21:34:00,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-21 21:34:00,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-21 21:34:00,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-21 21:34:00,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-21 21:34:00,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-21 21:34:00,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-21 21:34:00,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-21 21:34:00,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-21 21:34:00,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-21 21:34:00,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-21 21:34:00,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-21 21:34:00,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-21 21:34:00,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-21 21:34:00,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-21 21:34:00,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-21 21:34:00,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-21 21:34:00,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-21 21:34:00,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-21 21:34:00,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-21 21:34:00,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-21 21:34:00,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-21 21:34:00,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-21 21:34:00,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-21 21:34:00,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-21 21:34:00,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-21 21:34:00,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-21 21:34:00,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-21 21:34:00,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-21 21:34:00,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-21 21:34:00,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-21 21:34:00,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-21 21:34:00,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-21 21:34:00,863 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-21 21:34:00,906 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-21 21:34:00,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-21 21:34:00,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-21 21:34:00,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-21 21:34:00,908 INFO L138 SettingsManager]: * Use SBE=true [2020-10-21 21:34:00,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-21 21:34:00,909 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-21 21:34:00,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-21 21:34:00,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-21 21:34:00,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-21 21:34:00,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-21 21:34:00,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-21 21:34:00,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-21 21:34:00,912 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-21 21:34:00,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-21 21:34:00,912 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-21 21:34:00,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-21 21:34:00,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-21 21:34:00,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-21 21:34:00,913 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-21 21:34:00,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-21 21:34:00,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 21:34:00,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-21 21:34:00,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-21 21:34:00,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-21 21:34:00,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-21 21:34:00,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-21 21:34:00,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-21 21:34:00,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-21 21:34:00,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-21 21:34:01,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-21 21:34:01,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-21 21:34:01,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-21 21:34:01,275 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-21 21:34:01,275 INFO L275 PluginConnector]: CDTParser initialized [2020-10-21 21:34:01,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-10-21 21:34:01,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3181bc3f0/c72f0fcf41ab494c8da25adc45c97cc4/FLAG8771ac019 [2020-10-21 21:34:01,968 INFO L306 CDTParser]: Found 1 translation units. [2020-10-21 21:34:01,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-10-21 21:34:01,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3181bc3f0/c72f0fcf41ab494c8da25adc45c97cc4/FLAG8771ac019 [2020-10-21 21:34:02,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3181bc3f0/c72f0fcf41ab494c8da25adc45c97cc4 [2020-10-21 21:34:02,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-21 21:34:02,310 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-21 21:34:02,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-21 21:34:02,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-21 21:34:02,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-21 21:34:02,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 09:34:02" (1/1) ... [2020-10-21 21:34:02,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b9dec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:02, skipping insertion in model container [2020-10-21 21:34:02,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 09:34:02" (1/1) ... [2020-10-21 21:34:02,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-21 21:34:02,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-21 21:34:03,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 21:34:03,020 INFO L203 MainTranslator]: Completed pre-run [2020-10-21 21:34:03,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 21:34:03,228 INFO L208 MainTranslator]: Completed translation [2020-10-21 21:34:03,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:03 WrapperNode [2020-10-21 21:34:03,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-21 21:34:03,231 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-21 21:34:03,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-21 21:34:03,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-21 21:34:03,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:03" (1/1) ... [2020-10-21 21:34:03,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:03" (1/1) ... [2020-10-21 21:34:03,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-21 21:34:03,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-21 21:34:03,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-21 21:34:03,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-21 21:34:03,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:03" (1/1) ... [2020-10-21 21:34:03,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:03" (1/1) ... [2020-10-21 21:34:03,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:03" (1/1) ... [2020-10-21 21:34:03,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:03" (1/1) ... [2020-10-21 21:34:03,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:03" (1/1) ... [2020-10-21 21:34:03,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:03" (1/1) ... [2020-10-21 21:34:03,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:03" (1/1) ... [2020-10-21 21:34:03,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-21 21:34:03,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-21 21:34:03,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-21 21:34:03,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-21 21:34:03,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 21:34:03,412 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-21 21:34:03,413 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-21 21:34:03,413 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-21 21:34:03,413 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-21 21:34:03,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-21 21:34:03,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-21 21:34:03,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-21 21:34:03,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-21 21:34:03,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-21 21:34:03,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-21 21:34:03,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-21 21:34:03,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-21 21:34:03,417 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-21 21:34:03,857 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-21 21:34:03,857 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-21 21:34:03,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 09:34:03 BoogieIcfgContainer [2020-10-21 21:34:03,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-21 21:34:03,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-21 21:34:03,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-21 21:34:03,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-21 21:34:03,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 09:34:02" (1/3) ... [2020-10-21 21:34:03,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409acebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 09:34:03, skipping insertion in model container [2020-10-21 21:34:03,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:03" (2/3) ... [2020-10-21 21:34:03,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409acebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 09:34:03, skipping insertion in model container [2020-10-21 21:34:03,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 09:34:03" (3/3) ... [2020-10-21 21:34:03,871 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-10-21 21:34:03,883 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-21 21:34:03,884 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-21 21:34:03,891 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-21 21:34:03,892 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-21 21:34:03,920 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,920 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,920 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,921 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,921 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,921 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,922 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,922 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,922 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,922 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,923 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,923 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,923 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,923 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,924 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,924 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,924 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,924 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,925 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,925 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,925 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,926 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,926 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,926 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,926 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,927 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,927 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,927 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,931 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,932 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,932 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,932 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,932 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,933 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,942 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,942 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,943 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,943 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,943 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,943 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:03,958 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-21 21:34:03,975 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-21 21:34:04,001 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-21 21:34:04,002 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-21 21:34:04,002 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-21 21:34:04,002 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-21 21:34:04,002 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-21 21:34:04,003 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-21 21:34:04,003 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-21 21:34:04,003 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-21 21:34:04,017 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-21 21:34:04,020 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-21 21:34:04,022 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-21 21:34:04,024 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-10-21 21:34:04,068 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-10-21 21:34:04,068 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-21 21:34:04,075 INFO L80 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-10-21 21:34:04,078 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-10-21 21:34:05,435 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-21 21:34:05,890 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-21 21:34:06,024 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-21 21:34:06,077 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-10-21 21:34:06,077 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-10-21 21:34:06,083 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-21 21:34:06,093 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-21 21:34:06,095 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-21 21:34:06,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-21 21:34:06,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:06,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-21 21:34:06,104 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:06,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:06,110 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-10-21 21:34:06,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:06,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403513122] [2020-10-21 21:34:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:06,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403513122] [2020-10-21 21:34:06,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:34:06,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-21 21:34:06,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567420100] [2020-10-21 21:34:06,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-21 21:34:06,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:06,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-21 21:34:06,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-21 21:34:06,370 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-21 21:34:06,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:06,448 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-21 21:34:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-21 21:34:06,450 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-21 21:34:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:06,462 INFO L225 Difference]: With dead ends: 75 [2020-10-21 21:34:06,463 INFO L226 Difference]: Without dead ends: 42 [2020-10-21 21:34:06,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-21 21:34:06,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-21 21:34:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-21 21:34:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 21:34:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-21 21:34:06,506 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-21 21:34:06,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:06,507 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-21 21:34:06,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-21 21:34:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-21 21:34:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 21:34:06,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:06,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:06,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-21 21:34:06,509 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:06,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-10-21 21:34:06,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:06,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378798577] [2020-10-21 21:34:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:06,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378798577] [2020-10-21 21:34:06,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:34:06,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 21:34:06,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330508038] [2020-10-21 21:34:06,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 21:34:06,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:06,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 21:34:06,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-21 21:34:06,624 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-21 21:34:06,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:06,655 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-21 21:34:06,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-21 21:34:06,656 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 21:34:06,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:06,657 INFO L225 Difference]: With dead ends: 56 [2020-10-21 21:34:06,657 INFO L226 Difference]: Without dead ends: 50 [2020-10-21 21:34:06,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-21 21:34:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-21 21:34:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-21 21:34:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 21:34:06,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-21 21:34:06,666 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-21 21:34:06,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:06,667 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-21 21:34:06,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 21:34:06,668 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-21 21:34:06,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:34:06,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:06,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:06,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-21 21:34:06,669 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:06,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:06,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-10-21 21:34:06,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:06,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580939368] [2020-10-21 21:34:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:06,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580939368] [2020-10-21 21:34:06,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:34:06,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 21:34:06,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012072416] [2020-10-21 21:34:06,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 21:34:06,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:06,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 21:34:06,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-21 21:34:06,785 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-21 21:34:06,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:06,869 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-10-21 21:34:06,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 21:34:06,870 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 21:34:06,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:06,871 INFO L225 Difference]: With dead ends: 54 [2020-10-21 21:34:06,871 INFO L226 Difference]: Without dead ends: 47 [2020-10-21 21:34:06,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:34:06,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-21 21:34:06,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-21 21:34:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 21:34:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-10-21 21:34:06,879 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-10-21 21:34:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:06,879 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-10-21 21:34:06,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 21:34:06,880 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-10-21 21:34:06,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:34:06,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:06,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:06,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-21 21:34:06,881 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:06,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:06,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2101929440, now seen corresponding path program 2 times [2020-10-21 21:34:06,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:06,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917118255] [2020-10-21 21:34:06,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:06,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917118255] [2020-10-21 21:34:06,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:34:06,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 21:34:06,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399267585] [2020-10-21 21:34:06,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 21:34:06,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 21:34:06,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-21 21:34:06,989 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-10-21 21:34:07,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:07,060 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2020-10-21 21:34:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 21:34:07,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 21:34:07,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:07,062 INFO L225 Difference]: With dead ends: 59 [2020-10-21 21:34:07,063 INFO L226 Difference]: Without dead ends: 53 [2020-10-21 21:34:07,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:34:07,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-21 21:34:07,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-10-21 21:34:07,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 21:34:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 96 transitions. [2020-10-21 21:34:07,071 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 96 transitions. Word has length 10 [2020-10-21 21:34:07,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:07,071 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 96 transitions. [2020-10-21 21:34:07,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 21:34:07,071 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 96 transitions. [2020-10-21 21:34:07,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:34:07,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:07,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:07,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-21 21:34:07,073 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:07,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 3 times [2020-10-21 21:34:07,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:07,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506557783] [2020-10-21 21:34:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:07,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506557783] [2020-10-21 21:34:07,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:34:07,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 21:34:07,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181505686] [2020-10-21 21:34:07,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 21:34:07,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:07,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 21:34:07,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-21 21:34:07,129 INFO L87 Difference]: Start difference. First operand 41 states and 96 transitions. Second operand 6 states. [2020-10-21 21:34:07,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:07,208 INFO L93 Difference]: Finished difference Result 65 states and 152 transitions. [2020-10-21 21:34:07,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 21:34:07,209 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 21:34:07,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:07,210 INFO L225 Difference]: With dead ends: 65 [2020-10-21 21:34:07,210 INFO L226 Difference]: Without dead ends: 52 [2020-10-21 21:34:07,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:34:07,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-21 21:34:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-10-21 21:34:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 21:34:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-10-21 21:34:07,217 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-10-21 21:34:07,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:07,218 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-10-21 21:34:07,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 21:34:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-10-21 21:34:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:34:07,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:07,219 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:07,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-21 21:34:07,220 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:07,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:07,220 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 4 times [2020-10-21 21:34:07,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:07,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557404694] [2020-10-21 21:34:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:07,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557404694] [2020-10-21 21:34:07,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300843739] [2020-10-21 21:34:07,305 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:07,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:07,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:07,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 21:34:07,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:07,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:07,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:07,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-21 21:34:07,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769634422] [2020-10-21 21:34:07,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 21:34:07,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:07,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 21:34:07,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-21 21:34:07,441 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-10-21 21:34:07,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:07,636 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-10-21 21:34:07,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:34:07,636 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-21 21:34:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:07,637 INFO L225 Difference]: With dead ends: 63 [2020-10-21 21:34:07,637 INFO L226 Difference]: Without dead ends: 54 [2020-10-21 21:34:07,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:34:07,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-21 21:34:07,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-10-21 21:34:07,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-21 21:34:07,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-10-21 21:34:07,643 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-10-21 21:34:07,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:07,644 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-10-21 21:34:07,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 21:34:07,644 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-10-21 21:34:07,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:34:07,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:07,645 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:07,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-21 21:34:07,846 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:07,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:07,847 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 5 times [2020-10-21 21:34:07,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:07,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091554971] [2020-10-21 21:34:07,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:07,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091554971] [2020-10-21 21:34:07,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889317060] [2020-10-21 21:34:07,913 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:07,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:07,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:07,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 21:34:07,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:07,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:08,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:08,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-21 21:34:08,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372089857] [2020-10-21 21:34:08,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 21:34:08,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:08,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 21:34:08,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-21 21:34:08,010 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 8 states. [2020-10-21 21:34:08,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:08,143 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-21 21:34:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-21 21:34:08,144 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-21 21:34:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:08,145 INFO L225 Difference]: With dead ends: 56 [2020-10-21 21:34:08,145 INFO L226 Difference]: Without dead ends: 51 [2020-10-21 21:34:08,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:34:08,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-21 21:34:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-21 21:34:08,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-21 21:34:08,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-21 21:34:08,157 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-21 21:34:08,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:08,158 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-21 21:34:08,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 21:34:08,158 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-21 21:34:08,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:34:08,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:08,159 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:08,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:08,360 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:08,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 6 times [2020-10-21 21:34:08,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:08,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910185852] [2020-10-21 21:34:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:08,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910185852] [2020-10-21 21:34:08,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449898463] [2020-10-21 21:34:08,439 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:08,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 21:34:08,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:08,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:34:08,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:08,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:08,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:08,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-21 21:34:08,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493636454] [2020-10-21 21:34:08,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 21:34:08,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:08,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 21:34:08,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-21 21:34:08,522 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-21 21:34:08,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:08,643 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-21 21:34:08,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 21:34:08,644 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-21 21:34:08,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:08,644 INFO L225 Difference]: With dead ends: 56 [2020-10-21 21:34:08,645 INFO L226 Difference]: Without dead ends: 50 [2020-10-21 21:34:08,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:34:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-21 21:34:08,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-21 21:34:08,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-21 21:34:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-21 21:34:08,650 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-10-21 21:34:08,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:08,650 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-21 21:34:08,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 21:34:08,650 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-21 21:34:08,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:34:08,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:08,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:08,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:08,852 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:08,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 7 times [2020-10-21 21:34:08,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:08,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558228663] [2020-10-21 21:34:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:08,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558228663] [2020-10-21 21:34:08,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603893773] [2020-10-21 21:34:08,919 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:08,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:34:08,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:09,003 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:09,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:09,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-21 21:34:09,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163295219] [2020-10-21 21:34:09,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 21:34:09,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:09,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 21:34:09,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:34:09,020 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-10-21 21:34:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:09,260 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-10-21 21:34:09,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-21 21:34:09,261 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 21:34:09,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:09,261 INFO L225 Difference]: With dead ends: 63 [2020-10-21 21:34:09,262 INFO L226 Difference]: Without dead ends: 58 [2020-10-21 21:34:09,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-21 21:34:09,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-21 21:34:09,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-10-21 21:34:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 21:34:09,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-21 21:34:09,266 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 12 [2020-10-21 21:34:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:09,267 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-21 21:34:09,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 21:34:09,267 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-21 21:34:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:34:09,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:09,268 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:09,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:09,480 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:09,480 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 8 times [2020-10-21 21:34:09,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:09,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176845734] [2020-10-21 21:34:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:09,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176845734] [2020-10-21 21:34:09,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185200173] [2020-10-21 21:34:09,542 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 [2020-10-21 21:34:09,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:09,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:09,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:34:09,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:09,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:09,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:09,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-21 21:34:09,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70751145] [2020-10-21 21:34:09,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 21:34:09,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:09,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 21:34:09,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:34:09,642 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-10-21 21:34:09,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:09,869 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2020-10-21 21:34:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:34:09,873 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 21:34:09,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:09,874 INFO L225 Difference]: With dead ends: 71 [2020-10-21 21:34:09,874 INFO L226 Difference]: Without dead ends: 62 [2020-10-21 21:34:09,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-21 21:34:09,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-21 21:34:09,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-10-21 21:34:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-21 21:34:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-21 21:34:09,883 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-10-21 21:34:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:09,883 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-21 21:34:09,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 21:34:09,883 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-21 21:34:09,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:34:09,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:09,890 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:10,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-21 21:34:10,102 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:10,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:10,102 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 9 times [2020-10-21 21:34:10,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:10,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542300357] [2020-10-21 21:34:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:10,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542300357] [2020-10-21 21:34:10,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105938818] [2020-10-21 21:34:10,168 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 [2020-10-21 21:34:10,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 21:34:10,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:10,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:34:10,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:10,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:10,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-21 21:34:10,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461302701] [2020-10-21 21:34:10,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 21:34:10,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:10,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 21:34:10,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-21 21:34:10,292 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-21 21:34:10,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:10,598 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-21 21:34:10,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:34:10,599 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 21:34:10,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:10,600 INFO L225 Difference]: With dead ends: 72 [2020-10-21 21:34:10,600 INFO L226 Difference]: Without dead ends: 63 [2020-10-21 21:34:10,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:34:10,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-21 21:34:10,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-10-21 21:34:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 21:34:10,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-21 21:34:10,606 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-10-21 21:34:10,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:10,606 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-21 21:34:10,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 21:34:10,607 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-21 21:34:10,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:34:10,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:10,608 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:10,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:10,818 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:10,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:10,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 10 times [2020-10-21 21:34:10,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:10,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371195272] [2020-10-21 21:34:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:10,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371195272] [2020-10-21 21:34:10,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935383983] [2020-10-21 21:34:10,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:10,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:10,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:10,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:34:10,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:10,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:11,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:11,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-21 21:34:11,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999295223] [2020-10-21 21:34:11,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 21:34:11,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:11,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 21:34:11,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-21 21:34:11,011 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 10 states. [2020-10-21 21:34:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:11,199 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-21 21:34:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-21 21:34:11,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 21:34:11,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:11,200 INFO L225 Difference]: With dead ends: 64 [2020-10-21 21:34:11,200 INFO L226 Difference]: Without dead ends: 59 [2020-10-21 21:34:11,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-21 21:34:11,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-21 21:34:11,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-21 21:34:11,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 21:34:11,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-21 21:34:11,206 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-21 21:34:11,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:11,206 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-21 21:34:11,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 21:34:11,206 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-21 21:34:11,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 21:34:11,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:11,207 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:11,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:11,417 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:11,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:11,418 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 11 times [2020-10-21 21:34:11,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:11,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091678640] [2020-10-21 21:34:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:11,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091678640] [2020-10-21 21:34:11,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106735831] [2020-10-21 21:34:11,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:11,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 21:34:11,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:11,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:34:11,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:11,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:11,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:11,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-21 21:34:11,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124309428] [2020-10-21 21:34:11,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 21:34:11,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:11,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 21:34:11,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-21 21:34:11,611 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-21 21:34:11,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:11,751 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-21 21:34:11,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:34:11,752 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-21 21:34:11,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:11,753 INFO L225 Difference]: With dead ends: 64 [2020-10-21 21:34:11,753 INFO L226 Difference]: Without dead ends: 58 [2020-10-21 21:34:11,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:34:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-21 21:34:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-21 21:34:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-21 21:34:11,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-21 21:34:11,759 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-10-21 21:34:11,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:11,759 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-21 21:34:11,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 21:34:11,759 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-21 21:34:11,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 21:34:11,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:11,762 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:11,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-21 21:34:11,975 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:11,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 12 times [2020-10-21 21:34:11,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:11,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123446608] [2020-10-21 21:34:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:12,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123446608] [2020-10-21 21:34:12,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75275002] [2020-10-21 21:34:12,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:12,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 21:34:12,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:12,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:34:12,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:12,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:12,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:12,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-21 21:34:12,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453549588] [2020-10-21 21:34:12,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:34:12,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:12,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:34:12,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:34:12,188 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-10-21 21:34:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:12,488 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-21 21:34:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-21 21:34:12,489 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-21 21:34:12,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:12,490 INFO L225 Difference]: With dead ends: 73 [2020-10-21 21:34:12,490 INFO L226 Difference]: Without dead ends: 68 [2020-10-21 21:34:12,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-21 21:34:12,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-21 21:34:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-10-21 21:34:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 21:34:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-21 21:34:12,494 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 14 [2020-10-21 21:34:12,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:12,494 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-21 21:34:12,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:34:12,495 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-21 21:34:12,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 21:34:12,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:12,495 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:12,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:12,696 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:12,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 13 times [2020-10-21 21:34:12,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:12,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522423449] [2020-10-21 21:34:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:12,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522423449] [2020-10-21 21:34:12,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177139406] [2020-10-21 21:34:12,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:12,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:34:12,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:12,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:12,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:12,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-21 21:34:12,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613522225] [2020-10-21 21:34:12,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:34:12,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:12,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:34:12,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:34:12,862 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-10-21 21:34:13,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:13,167 INFO L93 Difference]: Finished difference Result 81 states and 191 transitions. [2020-10-21 21:34:13,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 21:34:13,171 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-21 21:34:13,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:13,172 INFO L225 Difference]: With dead ends: 81 [2020-10-21 21:34:13,172 INFO L226 Difference]: Without dead ends: 72 [2020-10-21 21:34:13,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-21 21:34:13,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-21 21:34:13,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-21 21:34:13,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 21:34:13,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-21 21:34:13,176 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-10-21 21:34:13,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:13,177 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-21 21:34:13,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:34:13,177 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-21 21:34:13,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-21 21:34:13,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:13,178 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:13,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-21 21:34:13,388 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:13,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:13,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 14 times [2020-10-21 21:34:13,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:13,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092388876] [2020-10-21 21:34:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:13,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092388876] [2020-10-21 21:34:13,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456147805] [2020-10-21 21:34:13,464 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 [2020-10-21 21:34:13,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:13,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:13,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:34:13,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:13,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:13,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:13,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-21 21:34:13,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160943781] [2020-10-21 21:34:13,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 21:34:13,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:13,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 21:34:13,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-21 21:34:13,583 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-21 21:34:13,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:13,963 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-21 21:34:13,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:34:13,963 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-21 21:34:13,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:13,965 INFO L225 Difference]: With dead ends: 82 [2020-10-21 21:34:13,965 INFO L226 Difference]: Without dead ends: 73 [2020-10-21 21:34:13,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-21 21:34:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-21 21:34:13,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-10-21 21:34:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 21:34:13,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-21 21:34:13,969 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-10-21 21:34:13,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:13,969 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-21 21:34:13,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 21:34:13,970 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-21 21:34:13,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-21 21:34:13,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:13,970 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:14,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-21 21:34:14,182 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:14,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:14,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 15 times [2020-10-21 21:34:14,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:14,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122666154] [2020-10-21 21:34:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:14,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122666154] [2020-10-21 21:34:14,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647069081] [2020-10-21 21:34:14,251 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 [2020-10-21 21:34:14,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-21 21:34:14,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:14,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:34:14,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:14,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:14,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:14,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-21 21:34:14,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779595540] [2020-10-21 21:34:14,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 21:34:14,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:14,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 21:34:14,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-21 21:34:14,341 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 12 states. [2020-10-21 21:34:14,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:14,617 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-10-21 21:34:14,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-21 21:34:14,617 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-21 21:34:14,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:14,618 INFO L225 Difference]: With dead ends: 72 [2020-10-21 21:34:14,618 INFO L226 Difference]: Without dead ends: 67 [2020-10-21 21:34:14,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:34:14,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-21 21:34:14,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-21 21:34:14,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-21 21:34:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-21 21:34:14,624 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-21 21:34:14,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:14,625 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-21 21:34:14,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 21:34:14,627 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-21 21:34:14,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 21:34:14,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:14,628 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:14,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-21 21:34:14,839 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:14,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:14,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 16 times [2020-10-21 21:34:14,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:14,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446821772] [2020-10-21 21:34:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:14,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446821772] [2020-10-21 21:34:14,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646491106] [2020-10-21 21:34:14,949 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 [2020-10-21 21:34:15,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:15,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:15,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 21:34:15,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:15,007 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:15,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:15,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-21 21:34:15,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667309802] [2020-10-21 21:34:15,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 21:34:15,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:15,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 21:34:15,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-21 21:34:15,029 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-21 21:34:15,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:15,222 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-10-21 21:34:15,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:34:15,222 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-21 21:34:15,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:15,224 INFO L225 Difference]: With dead ends: 72 [2020-10-21 21:34:15,224 INFO L226 Difference]: Without dead ends: 66 [2020-10-21 21:34:15,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:34:15,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-21 21:34:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-10-21 21:34:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-21 21:34:15,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-21 21:34:15,228 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-10-21 21:34:15,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:15,229 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-21 21:34:15,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 21:34:15,229 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-21 21:34:15,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 21:34:15,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:15,230 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:15,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-21 21:34:15,442 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:15,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:15,442 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 17 times [2020-10-21 21:34:15,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:15,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101671369] [2020-10-21 21:34:15,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:15,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101671369] [2020-10-21 21:34:15,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973279919] [2020-10-21 21:34:15,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:15,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-21 21:34:15,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:15,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 21:34:15,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:15,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:15,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:15,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-21 21:34:15,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99243990] [2020-10-21 21:34:15,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:34:15,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:15,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:34:15,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:34:15,649 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-10-21 21:34:16,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:16,030 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-21 21:34:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-21 21:34:16,030 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-21 21:34:16,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:16,031 INFO L225 Difference]: With dead ends: 83 [2020-10-21 21:34:16,031 INFO L226 Difference]: Without dead ends: 78 [2020-10-21 21:34:16,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-21 21:34:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-21 21:34:16,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2020-10-21 21:34:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 21:34:16,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-21 21:34:16,036 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 16 [2020-10-21 21:34:16,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:16,036 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-21 21:34:16,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:34:16,036 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-21 21:34:16,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 21:34:16,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:16,037 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:16,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:16,246 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:16,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:16,246 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 18 times [2020-10-21 21:34:16,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:16,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264402302] [2020-10-21 21:34:16,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:16,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264402302] [2020-10-21 21:34:16,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685649747] [2020-10-21 21:34:16,329 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 [2020-10-21 21:34:16,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-21 21:34:16,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:16,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 21:34:16,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:16,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:16,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-21 21:34:16,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717568039] [2020-10-21 21:34:16,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:34:16,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:16,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:34:16,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:34:16,412 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-10-21 21:34:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:16,745 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-10-21 21:34:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:34:16,746 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-21 21:34:16,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:16,747 INFO L225 Difference]: With dead ends: 91 [2020-10-21 21:34:16,747 INFO L226 Difference]: Without dead ends: 82 [2020-10-21 21:34:16,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-21 21:34:16,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-21 21:34:16,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-10-21 21:34:16,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-21 21:34:16,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-21 21:34:16,751 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-10-21 21:34:16,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:16,752 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-21 21:34:16,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:34:16,752 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-21 21:34:16,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-21 21:34:16,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:16,753 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:16,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:16,960 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:16,960 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 19 times [2020-10-21 21:34:16,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:16,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613939615] [2020-10-21 21:34:16,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:17,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613939615] [2020-10-21 21:34:17,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137053005] [2020-10-21 21:34:17,066 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 [2020-10-21 21:34:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:17,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 21:34:17,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:17,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:17,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:17,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-21 21:34:17,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138770090] [2020-10-21 21:34:17,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 21:34:17,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:17,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 21:34:17,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-21 21:34:17,170 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-21 21:34:17,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:17,653 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-21 21:34:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 21:34:17,653 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-21 21:34:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:17,654 INFO L225 Difference]: With dead ends: 92 [2020-10-21 21:34:17,654 INFO L226 Difference]: Without dead ends: 83 [2020-10-21 21:34:17,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 21:34:17,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-21 21:34:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-10-21 21:34:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 21:34:17,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-21 21:34:17,658 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-10-21 21:34:17,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:17,658 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-21 21:34:17,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 21:34:17,658 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-21 21:34:17,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-21 21:34:17,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:17,659 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:17,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:17,868 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:17,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:17,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 20 times [2020-10-21 21:34:17,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:17,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071674141] [2020-10-21 21:34:17,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:17,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071674141] [2020-10-21 21:34:17,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940021204] [2020-10-21 21:34:17,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:18,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:18,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:18,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 21:34:18,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:18,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:18,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:18,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-21 21:34:18,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263873372] [2020-10-21 21:34:18,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 21:34:18,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:18,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 21:34:18,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-21 21:34:18,068 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 14 states. [2020-10-21 21:34:18,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:18,468 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-10-21 21:34:18,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-21 21:34:18,469 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-21 21:34:18,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:18,469 INFO L225 Difference]: With dead ends: 80 [2020-10-21 21:34:18,470 INFO L226 Difference]: Without dead ends: 75 [2020-10-21 21:34:18,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-21 21:34:18,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-21 21:34:18,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-21 21:34:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 21:34:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-21 21:34:18,475 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-21 21:34:18,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:18,476 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-21 21:34:18,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 21:34:18,476 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-21 21:34:18,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 21:34:18,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:18,477 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:18,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-21 21:34:18,679 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:18,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:18,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 21 times [2020-10-21 21:34:18,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:18,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073371185] [2020-10-21 21:34:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:18,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073371185] [2020-10-21 21:34:18,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120620511] [2020-10-21 21:34:18,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:18,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-21 21:34:18,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:18,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 21:34:18,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:18,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:18,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:18,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-21 21:34:18,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181812376] [2020-10-21 21:34:18,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 21:34:18,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:18,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 21:34:18,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-21 21:34:18,936 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-21 21:34:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:19,178 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-21 21:34:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:34:19,179 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-21 21:34:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:19,180 INFO L225 Difference]: With dead ends: 80 [2020-10-21 21:34:19,180 INFO L226 Difference]: Without dead ends: 74 [2020-10-21 21:34:19,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:34:19,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-21 21:34:19,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-21 21:34:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-21 21:34:19,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-21 21:34:19,184 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-10-21 21:34:19,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:19,184 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-21 21:34:19,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 21:34:19,185 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-21 21:34:19,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 21:34:19,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:19,185 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:19,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-21 21:34:19,389 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:19,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:19,389 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 22 times [2020-10-21 21:34:19,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:19,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367436029] [2020-10-21 21:34:19,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:19,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367436029] [2020-10-21 21:34:19,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891072228] [2020-10-21 21:34:19,488 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:19,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:19,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:19,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 21:34:19,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:19,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:19,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:19,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-21 21:34:19,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141221094] [2020-10-21 21:34:19,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:34:19,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:19,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:34:19,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:34:19,578 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-10-21 21:34:20,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:20,072 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-21 21:34:20,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-21 21:34:20,072 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-21 21:34:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:20,073 INFO L225 Difference]: With dead ends: 93 [2020-10-21 21:34:20,074 INFO L226 Difference]: Without dead ends: 88 [2020-10-21 21:34:20,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 21:34:20,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-21 21:34:20,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2020-10-21 21:34:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 21:34:20,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-21 21:34:20,077 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 18 [2020-10-21 21:34:20,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:20,078 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-21 21:34:20,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:34:20,078 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-21 21:34:20,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 21:34:20,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:20,078 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:20,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-21 21:34:20,286 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:20,286 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 23 times [2020-10-21 21:34:20,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:20,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463037278] [2020-10-21 21:34:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:20,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463037278] [2020-10-21 21:34:20,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061017932] [2020-10-21 21:34:20,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:20,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-21 21:34:20,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:20,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 21:34:20,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:20,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:20,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:20,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-21 21:34:20,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793858060] [2020-10-21 21:34:20,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:34:20,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:20,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:34:20,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:34:20,508 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-10-21 21:34:21,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:21,048 INFO L93 Difference]: Finished difference Result 101 states and 239 transitions. [2020-10-21 21:34:21,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 21:34:21,049 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-21 21:34:21,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:21,050 INFO L225 Difference]: With dead ends: 101 [2020-10-21 21:34:21,050 INFO L226 Difference]: Without dead ends: 92 [2020-10-21 21:34:21,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 21:34:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-21 21:34:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-21 21:34:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 21:34:21,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-21 21:34:21,054 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-10-21 21:34:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:21,055 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-21 21:34:21,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:34:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-21 21:34:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-21 21:34:21,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:21,055 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:21,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-21 21:34:21,256 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:21,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:21,257 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 24 times [2020-10-21 21:34:21,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:21,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294093243] [2020-10-21 21:34:21,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:21,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294093243] [2020-10-21 21:34:21,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247978593] [2020-10-21 21:34:21,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:21,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-21 21:34:21,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:21,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 21:34:21,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:21,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-21 21:34:21,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-10-21 21:34:21,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497153634] [2020-10-21 21:34:21,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 21:34:21,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:21,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 21:34:21,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:34:21,390 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 8 states. [2020-10-21 21:34:21,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:21,405 INFO L93 Difference]: Finished difference Result 144 states and 324 transitions. [2020-10-21 21:34:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-21 21:34:21,406 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-21 21:34:21,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:21,406 INFO L225 Difference]: With dead ends: 144 [2020-10-21 21:34:21,406 INFO L226 Difference]: Without dead ends: 36 [2020-10-21 21:34:21,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:34:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-21 21:34:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-21 21:34:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-21 21:34:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 65 transitions. [2020-10-21 21:34:21,409 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 65 transitions. Word has length 19 [2020-10-21 21:34:21,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:21,409 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 65 transitions. [2020-10-21 21:34:21,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 21:34:21,409 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 65 transitions. [2020-10-21 21:34:21,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-21 21:34:21,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:21,410 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:21,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-21 21:34:21,619 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:21,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:21,619 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 25 times [2020-10-21 21:34:21,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:21,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887719686] [2020-10-21 21:34:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:21,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887719686] [2020-10-21 21:34:21,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959052834] [2020-10-21 21:34:21,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:21,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 21:34:21,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:21,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-21 21:34:21,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2020-10-21 21:34:21,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920021177] [2020-10-21 21:34:21,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 21:34:21,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:21,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 21:34:21,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-21 21:34:21,765 INFO L87 Difference]: Start difference. First operand 36 states and 65 transitions. Second operand 8 states. [2020-10-21 21:34:21,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:21,775 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2020-10-21 21:34:21,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-21 21:34:21,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-21 21:34:21,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:21,776 INFO L225 Difference]: With dead ends: 56 [2020-10-21 21:34:21,776 INFO L226 Difference]: Without dead ends: 0 [2020-10-21 21:34:21,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-21 21:34:21,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-21 21:34:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-21 21:34:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-21 21:34:21,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-21 21:34:21,778 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-21 21:34:21,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:21,778 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-21 21:34:21,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 21:34:21,778 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-21 21:34:21,778 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-21 21:34:21,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:21,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 09:34:21 BasicIcfg [2020-10-21 21:34:21,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-21 21:34:21,985 INFO L168 Benchmark]: Toolchain (without parser) took 19680.58 ms. Allocated memory was 142.6 MB in the beginning and 371.2 MB in the end (delta: 228.6 MB). Free memory was 102.4 MB in the beginning and 183.5 MB in the end (delta: -81.0 MB). Peak memory consumption was 147.6 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:21,985 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 142.6 MB. Free memory was 123.1 MB in the beginning and 122.7 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-21 21:34:21,986 INFO L168 Benchmark]: CACSL2BoogieTranslator took 919.57 ms. Allocated memory was 142.6 MB in the beginning and 205.0 MB in the end (delta: 62.4 MB). Free memory was 101.6 MB in the beginning and 163.0 MB in the end (delta: -61.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:21,986 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.71 ms. Allocated memory is still 205.0 MB. Free memory was 163.0 MB in the beginning and 160.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:21,986 INFO L168 Benchmark]: Boogie Preprocessor took 32.83 ms. Allocated memory is still 205.0 MB. Free memory was 160.2 MB in the beginning and 159.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:21,987 INFO L168 Benchmark]: RCFGBuilder took 510.79 ms. Allocated memory is still 205.0 MB. Free memory was 159.1 MB in the beginning and 136.6 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:21,987 INFO L168 Benchmark]: TraceAbstraction took 18121.16 ms. Allocated memory was 205.0 MB in the beginning and 371.2 MB in the end (delta: 166.2 MB). Free memory was 136.6 MB in the beginning and 183.5 MB in the end (delta: -46.9 MB). Peak memory consumption was 119.3 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:21,990 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 142.6 MB. Free memory was 123.1 MB in the beginning and 122.7 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 919.57 ms. Allocated memory was 142.6 MB in the beginning and 205.0 MB in the end (delta: 62.4 MB). Free memory was 101.6 MB in the beginning and 163.0 MB in the end (delta: -61.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 84.71 ms. Allocated memory is still 205.0 MB. Free memory was 163.0 MB in the beginning and 160.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.83 ms. Allocated memory is still 205.0 MB. Free memory was 160.2 MB in the beginning and 159.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 510.79 ms. Allocated memory is still 205.0 MB. Free memory was 159.1 MB in the beginning and 136.6 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18121.16 ms. Allocated memory was 205.0 MB in the beginning and 371.2 MB in the end (delta: 166.2 MB). Free memory was 136.6 MB in the beginning and 183.5 MB in the end (delta: -46.9 MB). Peak memory consumption was 119.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 785 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.0s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - PositiveResult [Line: 685]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17.9s, OverallIterations: 27, TraceHistogramMax: 6, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 441 SDtfs, 1059 SDslu, 1265 SDs, 0 SdLazy, 1367 SolverSat, 648 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 770 GetRequests, 277 SyntacticMatches, 16 SemanticMatches, 477 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 27 MinimizatonAttempts, 394 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 704 NumberOfCodeBlocks, 704 NumberOfCodeBlocksAsserted, 86 NumberOfCheckSat, 655 ConstructedInterpolants, 0 QuantifiedInterpolants, 37671 SizeOfPredicates, 136 NumberOfNonLiveVariables, 2486 ConjunctsInSsa, 232 ConjunctsInUnsatCore, 49 InterpolantComputations, 7 PerfectInterpolantSequences, 82/460 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 proved your program to be correct! Received shutdown request...