/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-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 10:51:19,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 10:51:19,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 10:51:19,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 10:51:19,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 10:51:19,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 10:51:19,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 10:51:19,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 10:51:19,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 10:51:19,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 10:51:19,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 10:51:19,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 10:51:19,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 10:51:19,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 10:51:19,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 10:51:19,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 10:51:19,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 10:51:19,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 10:51:19,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 10:51:19,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 10:51:19,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 10:51:19,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 10:51:19,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 10:51:19,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 10:51:19,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 10:51:19,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 10:51:19,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 10:51:19,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 10:51:19,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 10:51:19,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 10:51:19,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 10:51:19,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 10:51:19,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 10:51:19,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 10:51:19,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 10:51:19,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 10:51:19,976 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-16 10:51:19,998 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 10:51:19,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 10:51:20,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 10:51:20,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 10:51:20,000 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 10:51:20,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 10:51:20,001 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 10:51:20,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 10:51:20,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 10:51:20,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 10:51:20,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 10:51:20,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 10:51:20,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 10:51:20,002 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 10:51:20,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 10:51:20,002 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 10:51:20,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 10:51:20,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 10:51:20,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 10:51:20,003 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 10:51:20,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 10:51:20,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 10:51:20,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 10:51:20,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 10:51:20,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 10:51:20,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 10:51:20,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 10:51:20,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 10:51:20,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-16 10:51:20,005 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 10:51:20,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 10:51:20,344 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 10:51:20,348 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 10:51:20,349 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 10:51:20,350 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 10:51:20,351 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-16 10:51:20,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5059a91ab/c71aa7be083845b2bfaba158c7f9d222/FLAGcc74088f2 [2020-10-16 10:51:20,974 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 10:51:20,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-16 10:51:20,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5059a91ab/c71aa7be083845b2bfaba158c7f9d222/FLAGcc74088f2 [2020-10-16 10:51:21,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5059a91ab/c71aa7be083845b2bfaba158c7f9d222 [2020-10-16 10:51:21,251 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 10:51:21,254 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 10:51:21,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 10:51:21,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 10:51:21,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 10:51:21,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 10:51:21" (1/1) ... [2020-10-16 10:51:21,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e01ad76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:21, skipping insertion in model container [2020-10-16 10:51:21,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 10:51:21" (1/1) ... [2020-10-16 10:51:21,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 10:51:21,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 10:51:21,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 10:51:21,939 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 10:51:21,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 10:51:22,067 INFO L208 MainTranslator]: Completed translation [2020-10-16 10:51:22,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22 WrapperNode [2020-10-16 10:51:22,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 10:51:22,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 10:51:22,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 10:51:22,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 10:51:22,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 10:51:22,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 10:51:22,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 10:51:22,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 10:51:22,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... [2020-10-16 10:51:22,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 10:51:22,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 10:51:22,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 10:51:22,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 10:51:22,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:22,218 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 10:51:22,219 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 10:51:22,219 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 10:51:22,219 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 10:51:22,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 10:51:22,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 10:51:22,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 10:51:22,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 10:51:22,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 10:51:22,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 10:51:22,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 10:51:22,224 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 10:51:22,552 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 10:51:22,552 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 10:51:22,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 10:51:22 BoogieIcfgContainer [2020-10-16 10:51:22,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 10:51:22,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 10:51:22,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 10:51:22,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 10:51:22,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 10:51:21" (1/3) ... [2020-10-16 10:51:22,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f4e71e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 10:51:22, skipping insertion in model container [2020-10-16 10:51:22,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:22" (2/3) ... [2020-10-16 10:51:22,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f4e71e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 10:51:22, skipping insertion in model container [2020-10-16 10:51:22,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 10:51:22" (3/3) ... [2020-10-16 10:51:22,577 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-10-16 10:51:22,595 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 10:51:22,595 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 10:51:22,601 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 10:51:22,602 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 10:51:22,632 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,633 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,633 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,633 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,634 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,634 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,635 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,635 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,635 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,636 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,636 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,636 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,637 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,637 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,637 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,638 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,638 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,638 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,639 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,639 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,639 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,640 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,640 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,641 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,641 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,641 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,641 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,642 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,645 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,646 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,646 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,646 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,647 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,649 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,656 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,656 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,657 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,658 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,660 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 10:51:22,675 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 10:51:22,696 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 10:51:22,696 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 10:51:22,696 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 10:51:22,697 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 10:51:22,697 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 10:51:22,697 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 10:51:22,697 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 10:51:22,698 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 10:51:22,708 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 10:51:22,711 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 10:51:22,713 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 10:51:22,714 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 10:51:22,756 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 10:51:22,756 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 10:51:22,762 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-16 10:51:22,765 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-16 10:51:24,014 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-16 10:51:24,014 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-16 10:51:24,021 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-16 10:51:24,032 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 10:51:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 10:51:24,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 10:51:24,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:24,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 10:51:24,044 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:24,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-16 10:51:24,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:24,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570070366] [2020-10-16 10:51:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:24,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570070366] [2020-10-16 10:51:24,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:51:24,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 10:51:24,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973043216] [2020-10-16 10:51:24,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 10:51:24,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:24,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 10:51:24,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 10:51:24,329 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 10:51:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:24,401 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-16 10:51:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 10:51:24,403 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 10:51:24,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:24,416 INFO L225 Difference]: With dead ends: 75 [2020-10-16 10:51:24,416 INFO L226 Difference]: Without dead ends: 42 [2020-10-16 10:51:24,417 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 [2020-10-16 10:51:24,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-16 10:51:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-16 10:51:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 10:51:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-16 10:51:24,460 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-16 10:51:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:24,460 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-16 10:51:24,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 10:51:24,460 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-16 10:51:24,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 10:51:24,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:24,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:24,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 10:51:24,462 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:24,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:24,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-16 10:51:24,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:24,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669636101] [2020-10-16 10:51:24,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:24,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669636101] [2020-10-16 10:51:24,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:51:24,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 10:51:24,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7338367] [2020-10-16 10:51:24,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 10:51:24,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:24,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 10:51:24,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:51:24,549 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-16 10:51:24,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:24,579 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-16 10:51:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 10:51:24,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 10:51:24,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:24,581 INFO L225 Difference]: With dead ends: 56 [2020-10-16 10:51:24,581 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 10:51:24,582 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 [2020-10-16 10:51:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 10:51:24,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-16 10:51:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 10:51:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-16 10:51:24,589 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-16 10:51:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:24,590 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-16 10:51:24,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 10:51:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-16 10:51:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:51:24,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:24,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:24,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 10:51:24,592 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:24,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-16 10:51:24,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:24,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796127325] [2020-10-16 10:51:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:24,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796127325] [2020-10-16 10:51:24,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:51:24,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:51:24,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449561758] [2020-10-16 10:51:24,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:51:24,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:24,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:51:24,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:51:24,674 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-16 10:51:24,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:24,745 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-16 10:51:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:51:24,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:51:24,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:24,747 INFO L225 Difference]: With dead ends: 78 [2020-10-16 10:51:24,748 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 10:51:24,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:24,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 10:51:24,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-16 10:51:24,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:24,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 10:51:24,757 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-16 10:51:24,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:24,757 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 10:51:24,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:51:24,758 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 10:51:24,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:51:24,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:24,759 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:24,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 10:51:24,759 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:24,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:24,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-16 10:51:24,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:24,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173013740] [2020-10-16 10:51:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:24,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173013740] [2020-10-16 10:51:24,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:51:24,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:51:24,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079263484] [2020-10-16 10:51:24,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:51:24,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:24,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:51:24,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:51:24,860 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-16 10:51:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:24,937 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-16 10:51:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:51:24,938 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:51:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:24,939 INFO L225 Difference]: With dead ends: 54 [2020-10-16 10:51:24,939 INFO L226 Difference]: Without dead ends: 43 [2020-10-16 10:51:24,939 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 [2020-10-16 10:51:24,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-16 10:51:24,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-16 10:51:24,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 10:51:24,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-16 10:51:24,944 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-16 10:51:24,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:24,945 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-16 10:51:24,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:51:24,945 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-16 10:51:24,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:51:24,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:24,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:24,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 10:51:24,946 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:24,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:24,947 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-16 10:51:24,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:24,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53598167] [2020-10-16 10:51:24,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:25,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53598167] [2020-10-16 10:51:25,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:51:25,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:51:25,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136005313] [2020-10-16 10:51:25,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:51:25,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:25,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:51:25,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:51:25,004 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-16 10:51:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:25,069 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-16 10:51:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:51:25,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:51:25,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:25,070 INFO L225 Difference]: With dead ends: 57 [2020-10-16 10:51:25,070 INFO L226 Difference]: Without dead ends: 51 [2020-10-16 10:51:25,071 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 [2020-10-16 10:51:25,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-16 10:51:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-16 10:51:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 10:51:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-16 10:51:25,076 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-16 10:51:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:25,076 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-16 10:51:25,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:51:25,077 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-16 10:51:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:51:25,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:25,078 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:25,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 10:51:25,078 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:25,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:25,078 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-16 10:51:25,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:25,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136554797] [2020-10-16 10:51:25,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:25,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136554797] [2020-10-16 10:51:25,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737424813] [2020-10-16 10:51:25,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:25,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:25,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:25,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:51:25,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:25,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:25,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:25,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 10:51:25,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5966019] [2020-10-16 10:51:25,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:51:25,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:25,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:51:25,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-16 10:51:25,277 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-16 10:51:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:25,378 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-16 10:51:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:51:25,379 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 10:51:25,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:25,380 INFO L225 Difference]: With dead ends: 48 [2020-10-16 10:51:25,380 INFO L226 Difference]: Without dead ends: 43 [2020-10-16 10:51:25,380 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 [2020-10-16 10:51:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-16 10:51:25,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-16 10:51:25,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 10:51:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-16 10:51:25,386 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-16 10:51:25,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:25,386 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-16 10:51:25,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:51:25,387 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-16 10:51:25,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:51:25,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:25,387 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:25,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 10:51:25,599 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:25,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:25,599 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-16 10:51:25,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:25,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956804107] [2020-10-16 10:51:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:25,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956804107] [2020-10-16 10:51:25,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508436354] [2020-10-16 10:51:25,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:25,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:25,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:25,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:51:25,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:25,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:25,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 10:51:25,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373985282] [2020-10-16 10:51:25,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 10:51:25,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:25,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 10:51:25,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-16 10:51:25,774 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-16 10:51:25,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:25,843 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-16 10:51:25,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:51:25,844 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-16 10:51:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:25,845 INFO L225 Difference]: With dead ends: 54 [2020-10-16 10:51:25,845 INFO L226 Difference]: Without dead ends: 48 [2020-10-16 10:51:25,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:25,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-16 10:51:25,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-16 10:51:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 10:51:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-16 10:51:25,851 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-16 10:51:25,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:25,851 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-16 10:51:25,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 10:51:25,852 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-16 10:51:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:51:25,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:25,853 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:26,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:26,057 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:26,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:26,057 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-16 10:51:26,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:26,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669041877] [2020-10-16 10:51:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:26,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669041877] [2020-10-16 10:51:26,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379264818] [2020-10-16 10:51:26,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:26,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:51:26,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:26,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:51:26,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:26,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:26,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:26,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 10:51:26,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012690299] [2020-10-16 10:51:26,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:51:26,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:26,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:51:26,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 10:51:26,226 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-16 10:51:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:26,324 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-16 10:51:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:51:26,325 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 10:51:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:26,326 INFO L225 Difference]: With dead ends: 58 [2020-10-16 10:51:26,326 INFO L226 Difference]: Without dead ends: 52 [2020-10-16 10:51:26,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:26,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-16 10:51:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-16 10:51:26,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 10:51:26,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-16 10:51:26,331 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-16 10:51:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:26,332 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-16 10:51:26,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:51:26,332 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-16 10:51:26,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:51:26,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:26,333 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:26,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:26,546 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:26,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:26,547 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-16 10:51:26,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:26,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628039622] [2020-10-16 10:51:26,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:26,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628039622] [2020-10-16 10:51:26,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299946918] [2020-10-16 10:51:26,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:26,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:51:26,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:26,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:26,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 10:51:26,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634493871] [2020-10-16 10:51:26,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 10:51:26,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:26,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 10:51:26,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-16 10:51:26,682 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-16 10:51:26,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:26,803 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-16 10:51:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:26,803 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-16 10:51:26,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:26,804 INFO L225 Difference]: With dead ends: 78 [2020-10-16 10:51:26,805 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 10:51:26,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:26,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 10:51:26,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-16 10:51:26,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-16 10:51:26,811 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-16 10:51:26,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:26,812 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-16 10:51:26,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 10:51:26,812 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-16 10:51:26,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:51:26,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:26,813 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:27,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:27,026 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:27,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:27,027 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-16 10:51:27,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:27,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448068680] [2020-10-16 10:51:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:27,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448068680] [2020-10-16 10:51:27,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673274000] [2020-10-16 10:51:27,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:27,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:27,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:27,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:51:27,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:27,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:27,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:27,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 10:51:27,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863270512] [2020-10-16 10:51:27,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:51:27,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:27,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:51:27,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 10:51:27,189 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-16 10:51:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:27,367 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-16 10:51:27,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:51:27,368 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 10:51:27,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:27,369 INFO L225 Difference]: With dead ends: 62 [2020-10-16 10:51:27,369 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 10:51:27,369 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 [2020-10-16 10:51:27,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 10:51:27,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-16 10:51:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 10:51:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-16 10:51:27,375 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-16 10:51:27,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:27,375 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-16 10:51:27,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:51:27,375 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-16 10:51:27,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:51:27,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:27,376 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:27,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 10:51:27,587 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:27,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:27,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-16 10:51:27,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:27,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141667830] [2020-10-16 10:51:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:27,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141667830] [2020-10-16 10:51:27,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947430024] [2020-10-16 10:51:27,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:27,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:51:27,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:27,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:51:27,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:27,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:27,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 10:51:27,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414426135] [2020-10-16 10:51:27,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:51:27,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:27,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:51:27,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 10:51:27,729 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-16 10:51:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:27,837 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-16 10:51:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:51:27,838 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 10:51:27,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:27,839 INFO L225 Difference]: With dead ends: 64 [2020-10-16 10:51:27,839 INFO L226 Difference]: Without dead ends: 58 [2020-10-16 10:51:27,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:27,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-16 10:51:27,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-16 10:51:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 10:51:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-16 10:51:27,844 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-16 10:51:27,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:27,844 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-16 10:51:27,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:51:27,844 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-16 10:51:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:51:27,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:27,845 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:28,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:28,056 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:28,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-16 10:51:28,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:28,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329025721] [2020-10-16 10:51:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:28,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329025721] [2020-10-16 10:51:28,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052454141] [2020-10-16 10:51:28,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:28,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:28,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:28,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:51:28,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:28,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:28,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:28,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 10:51:28,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674373789] [2020-10-16 10:51:28,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:28,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:28,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:28,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:28,241 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-16 10:51:28,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:28,407 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-16 10:51:28,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:51:28,407 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 10:51:28,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:28,408 INFO L225 Difference]: With dead ends: 61 [2020-10-16 10:51:28,408 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 10:51:28,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:51:28,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 10:51:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-16 10:51:28,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 10:51:28,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-16 10:51:28,414 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-16 10:51:28,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:28,414 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-16 10:51:28,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:28,415 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-16 10:51:28,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:51:28,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:28,416 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:28,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:28,626 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:28,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:28,626 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-16 10:51:28,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:28,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957546846] [2020-10-16 10:51:28,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:28,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957546846] [2020-10-16 10:51:28,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183744083] [2020-10-16 10:51:28,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:28,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:28,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:28,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:51:28,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:28,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:28,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 10:51:28,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754316647] [2020-10-16 10:51:28,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:51:28,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:28,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:51:28,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 10:51:28,742 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-16 10:51:28,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:28,890 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-16 10:51:28,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:28,891 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 10:51:28,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:28,892 INFO L225 Difference]: With dead ends: 77 [2020-10-16 10:51:28,892 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 10:51:28,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:51:28,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 10:51:28,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-16 10:51:28,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 10:51:28,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-16 10:51:28,897 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-16 10:51:28,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:28,898 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-16 10:51:28,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:51:28,898 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-16 10:51:28,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:51:28,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:28,899 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:29,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 10:51:29,111 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:29,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:29,111 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-16 10:51:29,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:29,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931769096] [2020-10-16 10:51:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:29,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931769096] [2020-10-16 10:51:29,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670840205] [2020-10-16 10:51:29,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:29,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:51:29,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:29,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:51:29,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:29,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:29,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:29,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 10:51:29,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35932512] [2020-10-16 10:51:29,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:29,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:29,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:29,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:29,278 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-16 10:51:29,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:29,484 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-16 10:51:29,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:51:29,485 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 10:51:29,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:29,485 INFO L225 Difference]: With dead ends: 58 [2020-10-16 10:51:29,485 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 10:51:29,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:51:29,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 10:51:29,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-16 10:51:29,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 10:51:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-16 10:51:29,489 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-16 10:51:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:29,489 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-16 10:51:29,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-16 10:51:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:51:29,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:29,490 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:29,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:29,700 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:29,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:29,701 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-16 10:51:29,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:29,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120166730] [2020-10-16 10:51:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:29,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120166730] [2020-10-16 10:51:29,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889204670] [2020-10-16 10:51:29,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:29,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:51:29,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:29,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:29,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:29,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 10:51:29,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399041270] [2020-10-16 10:51:29,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:29,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:29,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:29,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:29,861 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-16 10:51:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:30,028 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-16 10:51:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:30,032 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 10:51:30,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:30,033 INFO L225 Difference]: With dead ends: 60 [2020-10-16 10:51:30,033 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 10:51:30,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:51:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 10:51:30,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-16 10:51:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 10:51:30,037 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-16 10:51:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:30,037 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 10:51:30,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 10:51:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:30,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:30,038 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:30,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 10:51:30,247 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:30,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:30,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-16 10:51:30,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:30,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63292717] [2020-10-16 10:51:30,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:30,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63292717] [2020-10-16 10:51:30,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216052104] [2020-10-16 10:51:30,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:30,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:30,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:30,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:30,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:30,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:30,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:30,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 10:51:30,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492506273] [2020-10-16 10:51:30,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:30,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:30,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:30,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:30,398 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-16 10:51:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:30,574 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-16 10:51:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:30,574 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 10:51:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:30,575 INFO L225 Difference]: With dead ends: 54 [2020-10-16 10:51:30,575 INFO L226 Difference]: Without dead ends: 49 [2020-10-16 10:51:30,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:51:30,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-16 10:51:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-16 10:51:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 10:51:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-16 10:51:30,579 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-16 10:51:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:30,579 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-16 10:51:30,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:30,579 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-16 10:51:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:30,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:30,580 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:30,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 10:51:30,781 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:30,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:30,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-16 10:51:30,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:30,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347714720] [2020-10-16 10:51:30,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:30,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347714720] [2020-10-16 10:51:30,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539899080] [2020-10-16 10:51:30,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:30,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:51:30,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:30,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:30,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:30,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:30,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 10:51:30,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311964103] [2020-10-16 10:51:30,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:30,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:30,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:30,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:30,913 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-16 10:51:31,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:31,013 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-16 10:51:31,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:51:31,014 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 10:51:31,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:31,015 INFO L225 Difference]: With dead ends: 60 [2020-10-16 10:51:31,015 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 10:51:31,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 10:51:31,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-16 10:51:31,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:31,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-16 10:51:31,020 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-16 10:51:31,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:31,021 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-16 10:51:31,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:31,021 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-16 10:51:31,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:31,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:31,022 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:31,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 10:51:31,234 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:31,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:31,235 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-16 10:51:31,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:31,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509381921] [2020-10-16 10:51:31,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:31,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509381921] [2020-10-16 10:51:31,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723906921] [2020-10-16 10:51:31,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:31,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:31,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:31,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:31,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:31,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:31,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:31,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 10:51:31,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435196897] [2020-10-16 10:51:31,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:31,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:31,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:31,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:31,407 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-16 10:51:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:31,523 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-16 10:51:31,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:51:31,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 10:51:31,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:31,524 INFO L225 Difference]: With dead ends: 66 [2020-10-16 10:51:31,525 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 10:51:31,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:51:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 10:51:31,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-16 10:51:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 10:51:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-16 10:51:31,528 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-16 10:51:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:31,528 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-16 10:51:31,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-16 10:51:31,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:31,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:31,529 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:31,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 10:51:31,733 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:31,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:31,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-16 10:51:31,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:31,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919362731] [2020-10-16 10:51:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:31,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919362731] [2020-10-16 10:51:31,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149686877] [2020-10-16 10:51:31,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:31,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:51:31,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:31,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:31,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:31,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:31,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 10:51:31,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002325823] [2020-10-16 10:51:31,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:31,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:31,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:31,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:31,868 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-16 10:51:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:32,008 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-16 10:51:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:51:32,008 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 10:51:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:32,009 INFO L225 Difference]: With dead ends: 67 [2020-10-16 10:51:32,010 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 10:51:32,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:51:32,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 10:51:32,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-16 10:51:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 10:51:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-16 10:51:32,014 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-16 10:51:32,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:32,014 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-16 10:51:32,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:32,014 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-16 10:51:32,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:32,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:32,015 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:32,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:32,220 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:32,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-16 10:51:32,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:32,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405428256] [2020-10-16 10:51:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:32,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405428256] [2020-10-16 10:51:32,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939879952] [2020-10-16 10:51:32,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:32,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:51:32,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:32,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:32,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:32,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:32,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:32,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 10:51:32,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705772125] [2020-10-16 10:51:32,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:32,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:32,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:32,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:32,380 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-16 10:51:32,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:32,594 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-16 10:51:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:51:32,594 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 10:51:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:32,595 INFO L225 Difference]: With dead ends: 69 [2020-10-16 10:51:32,595 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 10:51:32,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:51:32,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 10:51:32,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-16 10:51:32,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:32,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 10:51:32,598 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-16 10:51:32,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:32,599 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 10:51:32,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:32,599 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 10:51:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:32,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:32,599 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:32,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:32,809 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:32,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:32,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-16 10:51:32,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:32,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175192460] [2020-10-16 10:51:32,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:32,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175192460] [2020-10-16 10:51:32,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84441539] [2020-10-16 10:51:32,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:32,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:32,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:32,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:32,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 10:51:32,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531941185] [2020-10-16 10:51:32,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:32,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:32,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:32,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:32,942 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-16 10:51:33,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:33,139 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-16 10:51:33,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:33,143 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 10:51:33,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:33,144 INFO L225 Difference]: With dead ends: 88 [2020-10-16 10:51:33,144 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 10:51:33,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:51:33,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 10:51:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-16 10:51:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 10:51:33,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-16 10:51:33,148 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-16 10:51:33,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:33,148 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-16 10:51:33,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:33,148 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-16 10:51:33,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:33,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:33,149 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:33,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:33,359 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:33,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:33,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-16 10:51:33,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:33,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063323377] [2020-10-16 10:51:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:33,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063323377] [2020-10-16 10:51:33,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684866889] [2020-10-16 10:51:33,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:33,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:33,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:33,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:33,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:33,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:33,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:33,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 10:51:33,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857317923] [2020-10-16 10:51:33,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:33,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:33,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:33,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:33,498 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-16 10:51:33,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:33,731 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-16 10:51:33,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:33,731 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 10:51:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:33,732 INFO L225 Difference]: With dead ends: 69 [2020-10-16 10:51:33,732 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 10:51:33,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:51:33,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 10:51:33,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-16 10:51:33,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 10:51:33,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-16 10:51:33,736 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-16 10:51:33,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:33,736 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-16 10:51:33,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:33,736 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-16 10:51:33,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:33,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:33,737 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:33,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 10:51:33,947 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:33,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:33,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-16 10:51:33,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:33,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413709707] [2020-10-16 10:51:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:34,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413709707] [2020-10-16 10:51:34,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081595012] [2020-10-16 10:51:34,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:34,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:51:34,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:34,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:34,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:34,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:34,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 10:51:34,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406391940] [2020-10-16 10:51:34,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:34,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:34,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:34,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:34,093 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-16 10:51:34,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:34,223 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-16 10:51:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:34,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 10:51:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:34,225 INFO L225 Difference]: With dead ends: 74 [2020-10-16 10:51:34,225 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 10:51:34,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:51:34,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 10:51:34,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-16 10:51:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 10:51:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 10:51:34,228 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-16 10:51:34,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:34,229 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 10:51:34,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 10:51:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:34,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:34,229 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:34,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 10:51:34,434 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:34,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:34,434 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-16 10:51:34,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:34,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488993398] [2020-10-16 10:51:34,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:34,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488993398] [2020-10-16 10:51:34,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432576396] [2020-10-16 10:51:34,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:34,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:34,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:34,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:34,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:34,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:34,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:34,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 10:51:34,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988476523] [2020-10-16 10:51:34,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:34,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:34,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:34,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:34,619 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-16 10:51:34,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:34,812 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-16 10:51:34,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:51:34,813 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 10:51:34,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:34,814 INFO L225 Difference]: With dead ends: 71 [2020-10-16 10:51:34,814 INFO L226 Difference]: Without dead ends: 65 [2020-10-16 10:51:34,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:51:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-16 10:51:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-16 10:51:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:51:34,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 10:51:34,817 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-16 10:51:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:34,817 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 10:51:34,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 10:51:34,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:34,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:34,817 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:35,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 10:51:35,018 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:35,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:35,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-16 10:51:35,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:35,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384465241] [2020-10-16 10:51:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:35,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384465241] [2020-10-16 10:51:35,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928003781] [2020-10-16 10:51:35,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:35,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:51:35,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:35,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:35,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:35,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:35,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 10:51:35,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882343195] [2020-10-16 10:51:35,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:35,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:35,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:35,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:35,158 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-16 10:51:35,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:35,335 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-16 10:51:35,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:51:35,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 10:51:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:35,336 INFO L225 Difference]: With dead ends: 68 [2020-10-16 10:51:35,337 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 10:51:35,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:51:35,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 10:51:35,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-16 10:51:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 10:51:35,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 10:51:35,341 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-16 10:51:35,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:35,341 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 10:51:35,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 10:51:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:35,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:35,342 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:35,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 10:51:35,548 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:35,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:35,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-16 10:51:35,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:35,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227589686] [2020-10-16 10:51:35,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:35,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227589686] [2020-10-16 10:51:35,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345829941] [2020-10-16 10:51:35,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:35,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:51:35,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:35,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:35,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:35,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:35,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:35,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 10:51:35,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772628821] [2020-10-16 10:51:35,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:35,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:35,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:35,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:35,693 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-16 10:51:35,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:35,938 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-16 10:51:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:35,939 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 10:51:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:35,940 INFO L225 Difference]: With dead ends: 67 [2020-10-16 10:51:35,940 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 10:51:35,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:51:35,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 10:51:35,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-16 10:51:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:51:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 10:51:35,944 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-16 10:51:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:35,944 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 10:51:35,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:35,944 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 10:51:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:35,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:35,945 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:36,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 10:51:36,151 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:36,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-16 10:51:36,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:36,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916545821] [2020-10-16 10:51:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:36,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916545821] [2020-10-16 10:51:36,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63956718] [2020-10-16 10:51:36,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:36,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:36,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:36,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:36,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 10:51:36,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389727009] [2020-10-16 10:51:36,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:36,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:36,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:36,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:36,287 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-16 10:51:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:36,527 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-16 10:51:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:36,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 10:51:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:36,530 INFO L225 Difference]: With dead ends: 83 [2020-10-16 10:51:36,530 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 10:51:36,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:51:36,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 10:51:36,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-16 10:51:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 10:51:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-16 10:51:36,533 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-16 10:51:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:36,533 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-16 10:51:36,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-16 10:51:36,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:36,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:36,534 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:36,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:36,743 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:36,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-16 10:51:36,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:36,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090627753] [2020-10-16 10:51:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:36,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090627753] [2020-10-16 10:51:36,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620129345] [2020-10-16 10:51:36,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:36,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:36,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:36,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:36,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:36,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:36,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 10:51:36,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664831044] [2020-10-16 10:51:36,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:36,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:36,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:36,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:36,878 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-16 10:51:37,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:37,148 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-16 10:51:37,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:37,149 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 10:51:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:37,149 INFO L225 Difference]: With dead ends: 62 [2020-10-16 10:51:37,150 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 10:51:37,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:51:37,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 10:51:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-16 10:51:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-16 10:51:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-16 10:51:37,154 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-16 10:51:37,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:37,154 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-16 10:51:37,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-16 10:51:37,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:37,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:37,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:37,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 10:51:37,357 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:37,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:37,358 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-16 10:51:37,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:37,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063871848] [2020-10-16 10:51:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:37,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063871848] [2020-10-16 10:51:37,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638600289] [2020-10-16 10:51:37,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:37,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:51:37,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:37,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:37,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:37,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:37,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:37,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 10:51:37,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739663476] [2020-10-16 10:51:37,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:37,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:37,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:37,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:37,497 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-16 10:51:37,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:37,779 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-16 10:51:37,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:37,779 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 10:51:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:37,780 INFO L225 Difference]: With dead ends: 68 [2020-10-16 10:51:37,780 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 10:51:37,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:51:37,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 10:51:37,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-16 10:51:37,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 10:51:37,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-16 10:51:37,783 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-16 10:51:37,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:37,783 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-16 10:51:37,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:37,783 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-16 10:51:37,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:37,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:37,784 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:37,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 10:51:37,993 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:37,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:37,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-16 10:51:37,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:37,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327302792] [2020-10-16 10:51:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:38,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327302792] [2020-10-16 10:51:38,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345828714] [2020-10-16 10:51:38,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:38,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:38,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:38,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:38,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:38,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:38,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:38,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 10:51:38,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096234379] [2020-10-16 10:51:38,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:38,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:38,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:38,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:38,143 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-16 10:51:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:38,452 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-16 10:51:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:38,453 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 10:51:38,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:38,453 INFO L225 Difference]: With dead ends: 60 [2020-10-16 10:51:38,454 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 10:51:38,454 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 [2020-10-16 10:51:38,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 10:51:38,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-16 10:51:38,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 10:51:38,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-16 10:51:38,457 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-16 10:51:38,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:38,457 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-16 10:51:38,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:38,457 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-16 10:51:38,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:38,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:38,458 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:38,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:38,667 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:38,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-16 10:51:38,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:38,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897075862] [2020-10-16 10:51:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:38,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897075862] [2020-10-16 10:51:38,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689341041] [2020-10-16 10:51:38,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:38,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 10:51:38,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:38,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:38,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:38,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:38,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 10:51:38,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289411609] [2020-10-16 10:51:38,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:38,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:38,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:38,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:38,826 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-16 10:51:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:38,963 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-16 10:51:38,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:38,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 10:51:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:38,965 INFO L225 Difference]: With dead ends: 66 [2020-10-16 10:51:38,965 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 10:51:38,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:51:38,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 10:51:38,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-16 10:51:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:51:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-16 10:51:38,968 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-16 10:51:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:38,968 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-16 10:51:38,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-16 10:51:38,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:38,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:38,969 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:39,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:39,170 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:39,170 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-16 10:51:39,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:39,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824876673] [2020-10-16 10:51:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:39,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824876673] [2020-10-16 10:51:39,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114971349] [2020-10-16 10:51:39,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:39,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 10:51:39,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:39,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:39,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:39,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:39,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:39,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 10:51:39,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215467315] [2020-10-16 10:51:39,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:39,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:39,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:39,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:39,316 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-16 10:51:39,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:39,500 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-16 10:51:39,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:51:39,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 10:51:39,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:39,502 INFO L225 Difference]: With dead ends: 74 [2020-10-16 10:51:39,502 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 10:51:39,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:51:39,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 10:51:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-16 10:51:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 10:51:39,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-16 10:51:39,506 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-16 10:51:39,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:39,506 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-16 10:51:39,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:39,506 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-16 10:51:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:39,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:39,507 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:39,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 10:51:39,716 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:39,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:39,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-16 10:51:39,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:39,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838700176] [2020-10-16 10:51:39,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:39,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838700176] [2020-10-16 10:51:39,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171271288] [2020-10-16 10:51:39,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:39,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:39,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:39,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:39,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 10:51:39,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365007558] [2020-10-16 10:51:39,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:39,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:39,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:39,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:39,865 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-16 10:51:40,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:40,072 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-16 10:51:40,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:40,072 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 10:51:40,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:40,073 INFO L225 Difference]: With dead ends: 75 [2020-10-16 10:51:40,073 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 10:51:40,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:51:40,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 10:51:40,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-16 10:51:40,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 10:51:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 10:51:40,077 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-16 10:51:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:40,078 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 10:51:40,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 10:51:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:40,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:40,079 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:40,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:40,288 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:40,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:40,288 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-16 10:51:40,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:40,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165867127] [2020-10-16 10:51:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:40,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165867127] [2020-10-16 10:51:40,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954478676] [2020-10-16 10:51:40,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:40,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:40,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:40,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:40,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:40,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:40,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:40,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 10:51:40,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085258799] [2020-10-16 10:51:40,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:40,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:40,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:40,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:40,445 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-16 10:51:40,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:40,701 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-16 10:51:40,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:40,701 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 10:51:40,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:40,702 INFO L225 Difference]: With dead ends: 79 [2020-10-16 10:51:40,702 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 10:51:40,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:51:40,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 10:51:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-16 10:51:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:51:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 10:51:40,705 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-16 10:51:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:40,705 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 10:51:40,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 10:51:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:40,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:40,706 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:40,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 10:51:40,914 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:40,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:40,914 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-16 10:51:40,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:40,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718146763] [2020-10-16 10:51:40,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:40,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718146763] [2020-10-16 10:51:40,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323553184] [2020-10-16 10:51:40,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:41,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:51:41,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:41,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:41,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:41,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:41,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 10:51:41,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183978109] [2020-10-16 10:51:41,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:41,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:41,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:41,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:41,057 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-16 10:51:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:41,274 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-16 10:51:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:51:41,274 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 10:51:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:41,275 INFO L225 Difference]: With dead ends: 79 [2020-10-16 10:51:41,275 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 10:51:41,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:51:41,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 10:51:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-16 10:51:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 10:51:41,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-16 10:51:41,278 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-16 10:51:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:41,279 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-16 10:51:41,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:41,279 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-16 10:51:41,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:41,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:41,279 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:41,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:41,480 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:41,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:41,481 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-16 10:51:41,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:41,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187973915] [2020-10-16 10:51:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:41,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187973915] [2020-10-16 10:51:41,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221766945] [2020-10-16 10:51:41,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:41,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:41,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:41,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:41,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:41,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:41,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:41,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 10:51:41,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28577946] [2020-10-16 10:51:41,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:41,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:41,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:41,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:41,633 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-16 10:51:41,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:41,946 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-16 10:51:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:51:41,947 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 10:51:41,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:41,948 INFO L225 Difference]: With dead ends: 76 [2020-10-16 10:51:41,948 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 10:51:41,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:51:41,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 10:51:41,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-16 10:51:41,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 10:51:41,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-16 10:51:41,951 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-16 10:51:41,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:41,951 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-16 10:51:41,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:41,951 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-16 10:51:41,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:41,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:41,952 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:42,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 10:51:42,159 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:42,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:42,160 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-16 10:51:42,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:42,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522816656] [2020-10-16 10:51:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:42,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522816656] [2020-10-16 10:51:42,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308446692] [2020-10-16 10:51:42,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:42,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 10:51:42,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:42,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:42,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:42,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:42,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 10:51:42,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007337198] [2020-10-16 10:51:42,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:42,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:42,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:42,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:42,282 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-16 10:51:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:42,554 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-16 10:51:42,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:51:42,556 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 10:51:42,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:42,557 INFO L225 Difference]: With dead ends: 96 [2020-10-16 10:51:42,557 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 10:51:42,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:51:42,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 10:51:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-16 10:51:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:51:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-16 10:51:42,560 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-16 10:51:42,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:42,560 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-16 10:51:42,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-16 10:51:42,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:42,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:42,561 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:42,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 10:51:42,769 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:42,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:42,769 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-16 10:51:42,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:42,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537910983] [2020-10-16 10:51:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:42,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537910983] [2020-10-16 10:51:42,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953539107] [2020-10-16 10:51:42,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:42,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 10:51:42,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:42,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:42,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:42,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:42,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:42,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 10:51:42,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599009547] [2020-10-16 10:51:42,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:42,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:42,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:42,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:42,922 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-16 10:51:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:43,265 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-16 10:51:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:51:43,265 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 10:51:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:43,266 INFO L225 Difference]: With dead ends: 77 [2020-10-16 10:51:43,266 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 10:51:43,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:51:43,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 10:51:43,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-16 10:51:43,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 10:51:43,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-16 10:51:43,269 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-16 10:51:43,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:43,269 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-16 10:51:43,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:43,270 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-16 10:51:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:43,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:43,270 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:43,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 10:51:43,477 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:43,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:43,477 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-16 10:51:43,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:43,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546864176] [2020-10-16 10:51:43,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:43,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546864176] [2020-10-16 10:51:43,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963008040] [2020-10-16 10:51:43,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:43,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:43,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:43,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:43,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 10:51:43,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954447915] [2020-10-16 10:51:43,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:43,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:43,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:43,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:43,667 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-16 10:51:43,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:43,832 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-16 10:51:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:51:43,833 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 10:51:43,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:43,834 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:51:43,834 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 10:51:43,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:51:43,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 10:51:43,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-16 10:51:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 10:51:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 10:51:43,838 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 10:51:43,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:43,838 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 10:51:43,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:43,838 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 10:51:43,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:43,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:43,839 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:44,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 10:51:44,049 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:44,049 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-16 10:51:44,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:44,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614238985] [2020-10-16 10:51:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:44,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614238985] [2020-10-16 10:51:44,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058209395] [2020-10-16 10:51:44,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:44,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:44,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:44,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:44,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:44,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:44,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:44,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 10:51:44,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161946534] [2020-10-16 10:51:44,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:44,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:44,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:44,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:44,200 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 10:51:44,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:44,443 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-16 10:51:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:44,443 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 10:51:44,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:44,444 INFO L225 Difference]: With dead ends: 81 [2020-10-16 10:51:44,444 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 10:51:44,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:51:44,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 10:51:44,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-16 10:51:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 10:51:44,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 10:51:44,448 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 10:51:44,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:44,448 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 10:51:44,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:44,448 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 10:51:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:44,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:44,449 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:44,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 10:51:44,658 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:44,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:44,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-16 10:51:44,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:44,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202918893] [2020-10-16 10:51:44,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:44,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202918893] [2020-10-16 10:51:44,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957116363] [2020-10-16 10:51:44,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:44,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:51:44,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:44,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:44,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:44,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:44,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 10:51:44,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105865252] [2020-10-16 10:51:44,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:44,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:44,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:44,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:44,817 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 10:51:45,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:45,040 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-16 10:51:45,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:45,041 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 10:51:45,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:45,042 INFO L225 Difference]: With dead ends: 78 [2020-10-16 10:51:45,042 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 10:51:45,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:51:45,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 10:51:45,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-16 10:51:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 10:51:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 10:51:45,046 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 10:51:45,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:45,047 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 10:51:45,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 10:51:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:45,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:45,047 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:45,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-16 10:51:45,258 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:45,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:45,258 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-16 10:51:45,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:45,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529315966] [2020-10-16 10:51:45,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:45,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529315966] [2020-10-16 10:51:45,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541133567] [2020-10-16 10:51:45,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:45,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:45,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:45,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:45,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:45,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:45,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:45,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 10:51:45,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37155038] [2020-10-16 10:51:45,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:45,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:45,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:45,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:45,405 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 10:51:45,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:45,715 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-16 10:51:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:51:45,716 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 10:51:45,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:45,717 INFO L225 Difference]: With dead ends: 77 [2020-10-16 10:51:45,717 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 10:51:45,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:51:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 10:51:45,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-16 10:51:45,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 10:51:45,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 10:51:45,720 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 10:51:45,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:45,720 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 10:51:45,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:45,720 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 10:51:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:45,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:45,721 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:45,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 10:51:45,922 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:45,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:45,922 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-16 10:51:45,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:45,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735713181] [2020-10-16 10:51:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:45,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735713181] [2020-10-16 10:51:45,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548439929] [2020-10-16 10:51:45,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:46,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 10:51:46,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:46,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:46,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:46,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:46,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 10:51:46,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608769155] [2020-10-16 10:51:46,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:46,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:46,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:46,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:46,128 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 10:51:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:46,440 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-16 10:51:46,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:51:46,441 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 10:51:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:46,442 INFO L225 Difference]: With dead ends: 74 [2020-10-16 10:51:46,442 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 10:51:46,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:51:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 10:51:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-16 10:51:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 10:51:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 10:51:46,445 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 10:51:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:46,447 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 10:51:46,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:46,447 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 10:51:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:46,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:46,448 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:46,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:46,655 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:46,656 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-16 10:51:46,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:46,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995550482] [2020-10-16 10:51:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:46,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995550482] [2020-10-16 10:51:46,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142436305] [2020-10-16 10:51:46,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:46,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 10:51:46,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:46,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:46,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:46,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:46,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:46,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 10:51:46,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173837131] [2020-10-16 10:51:46,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:46,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:46,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:46,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:46,877 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 10:51:47,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:47,291 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-16 10:51:47,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:51:47,292 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 10:51:47,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:47,292 INFO L225 Difference]: With dead ends: 73 [2020-10-16 10:51:47,293 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 10:51:47,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:51:47,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 10:51:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-16 10:51:47,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 10:51:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 10:51:47,297 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 10:51:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:47,297 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 10:51:47,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:47,297 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 10:51:47,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:47,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:47,298 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:47,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 10:51:47,506 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:47,507 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-16 10:51:47,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:47,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935101538] [2020-10-16 10:51:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:47,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935101538] [2020-10-16 10:51:47,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008438277] [2020-10-16 10:51:47,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:47,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:47,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:47,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:47,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 10:51:47,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562838462] [2020-10-16 10:51:47,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:47,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:47,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:47,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:47,696 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 10:51:47,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:47,977 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-16 10:51:47,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:51:47,978 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 10:51:47,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:47,979 INFO L225 Difference]: With dead ends: 89 [2020-10-16 10:51:47,979 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 10:51:47,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:51:47,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 10:51:47,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-16 10:51:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 10:51:47,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-16 10:51:47,982 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-16 10:51:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:47,982 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-16 10:51:47,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-16 10:51:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:47,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:47,983 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:48,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:48,190 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:48,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:48,190 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-16 10:51:48,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:48,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534384532] [2020-10-16 10:51:48,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:48,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534384532] [2020-10-16 10:51:48,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257456159] [2020-10-16 10:51:48,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:48,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:48,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:48,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:48,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:48,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:48,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:48,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 10:51:48,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338403964] [2020-10-16 10:51:48,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:48,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:48,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:48,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:48,349 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-16 10:51:48,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:48,756 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-10-16 10:51:48,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:51:48,757 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 10:51:48,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:48,758 INFO L225 Difference]: With dead ends: 70 [2020-10-16 10:51:48,758 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 10:51:48,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:51:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 10:51:48,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-10-16 10:51:48,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 10:51:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-16 10:51:48,761 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-16 10:51:48,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:48,761 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-16 10:51:48,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:48,761 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-16 10:51:48,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:48,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:48,762 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:48,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 10:51:48,969 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:48,970 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-16 10:51:48,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:48,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989130950] [2020-10-16 10:51:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:49,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989130950] [2020-10-16 10:51:49,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967199290] [2020-10-16 10:51:49,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:49,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:51:49,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:49,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:49,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:49,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:49,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:49,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 10:51:49,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282020025] [2020-10-16 10:51:49,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:49,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:49,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:49,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:49,114 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-16 10:51:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:49,502 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-16 10:51:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:51:49,503 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 10:51:49,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:49,504 INFO L225 Difference]: With dead ends: 76 [2020-10-16 10:51:49,504 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 10:51:49,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:51:49,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 10:51:49,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-16 10:51:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:51:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-16 10:51:49,507 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-16 10:51:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:49,507 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-16 10:51:49,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:49,507 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-16 10:51:49,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:49,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:49,508 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:49,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:49,717 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:49,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:49,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-16 10:51:49,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:49,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644334562] [2020-10-16 10:51:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:49,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644334562] [2020-10-16 10:51:49,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863714412] [2020-10-16 10:51:49,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:49,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:49,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:49,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:49,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:49,868 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:49,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:49,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:49,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528370420] [2020-10-16 10:51:49,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:49,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:49,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:49,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:49,882 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-16 10:51:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:50,269 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-16 10:51:50,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:51:50,272 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:50,273 INFO L225 Difference]: With dead ends: 66 [2020-10-16 10:51:50,273 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 10:51:50,274 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 [2020-10-16 10:51:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 10:51:50,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-16 10:51:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-16 10:51:50,276 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-16 10:51:50,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:50,277 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-16 10:51:50,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:50,277 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-16 10:51:50,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:50,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:50,277 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:50,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-16 10:51:50,486 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-16 10:51:50,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:50,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450757857] [2020-10-16 10:51:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:50,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450757857] [2020-10-16 10:51:50,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727915342] [2020-10-16 10:51:50,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:50,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 10:51:50,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:50,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:50,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:50,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:50,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 10:51:50,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476753843] [2020-10-16 10:51:50,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:50,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:50,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:50,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:50,650 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-16 10:51:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:50,825 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-16 10:51:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:51:50,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 10:51:50,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:50,826 INFO L225 Difference]: With dead ends: 72 [2020-10-16 10:51:50,826 INFO L226 Difference]: Without dead ends: 66 [2020-10-16 10:51:50,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:51:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-16 10:51:50,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-16 10:51:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 10:51:50,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-16 10:51:50,830 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-16 10:51:50,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:50,830 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-16 10:51:50,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:50,830 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-16 10:51:50,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:50,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:50,831 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:51,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 10:51:51,040 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:51,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:51,040 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-16 10:51:51,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:51,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859054608] [2020-10-16 10:51:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:51,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859054608] [2020-10-16 10:51:51,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066014558] [2020-10-16 10:51:51,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:51,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 10:51:51,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:51,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:51,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:51,210 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:51,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:51,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:51,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665787985] [2020-10-16 10:51:51,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:51,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:51,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:51,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:51,223 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-16 10:51:51,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:51,442 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-16 10:51:51,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:51,442 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:51,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:51,443 INFO L225 Difference]: With dead ends: 82 [2020-10-16 10:51:51,443 INFO L226 Difference]: Without dead ends: 76 [2020-10-16 10:51:51,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:51:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-16 10:51:51,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-16 10:51:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 10:51:51,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-16 10:51:51,447 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-16 10:51:51,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:51,447 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-16 10:51:51,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:51,447 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-16 10:51:51,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:51,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:51,448 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:51,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 10:51:51,656 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:51,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:51,657 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-16 10:51:51,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:51,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298549439] [2020-10-16 10:51:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:51,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298549439] [2020-10-16 10:51:51,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89404595] [2020-10-16 10:51:51,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:51,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:51,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:51,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:51,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 10:51:51,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794665806] [2020-10-16 10:51:51,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:51,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:51,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:51,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:51,829 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-16 10:51:52,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:52,068 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-16 10:51:52,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:51:52,069 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 10:51:52,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:52,070 INFO L225 Difference]: With dead ends: 83 [2020-10-16 10:51:52,070 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 10:51:52,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:51:52,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 10:51:52,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-16 10:51:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 10:51:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-16 10:51:52,075 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-16 10:51:52,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:52,075 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-16 10:51:52,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:52,075 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-16 10:51:52,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:52,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:52,076 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:52,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-16 10:51:52,283 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:52,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:52,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-16 10:51:52,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:52,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232175302] [2020-10-16 10:51:52,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:52,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232175302] [2020-10-16 10:51:52,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664232472] [2020-10-16 10:51:52,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:52,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:52,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:52,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:52,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:52,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:52,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:52,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:52,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628116127] [2020-10-16 10:51:52,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:52,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:52,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:52,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:52,494 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-16 10:51:52,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:52,865 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-16 10:51:52,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:51:52,865 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:52,866 INFO L225 Difference]: With dead ends: 89 [2020-10-16 10:51:52,866 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 10:51:52,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:51:52,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 10:51:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-16 10:51:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 10:51:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-16 10:51:52,869 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-16 10:51:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:52,870 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-16 10:51:52,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-16 10:51:52,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:52,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:52,871 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:53,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:53,079 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:53,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:53,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-16 10:51:53,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:53,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576482195] [2020-10-16 10:51:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:53,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576482195] [2020-10-16 10:51:53,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623115316] [2020-10-16 10:51:53,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:53,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 10:51:53,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:53,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:53,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:53,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:53,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 10:51:53,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235704018] [2020-10-16 10:51:53,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:53,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:53,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:53,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:53,275 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-16 10:51:53,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:53,540 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-16 10:51:53,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:51:53,541 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 10:51:53,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:53,542 INFO L225 Difference]: With dead ends: 89 [2020-10-16 10:51:53,542 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 10:51:53,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:51:53,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 10:51:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-16 10:51:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 10:51:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 10:51:53,546 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-16 10:51:53,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:53,546 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 10:51:53,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:53,547 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 10:51:53,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:53,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:53,547 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:53,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:53,748 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:53,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:53,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-16 10:51:53,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:53,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120718306] [2020-10-16 10:51:53,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:53,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120718306] [2020-10-16 10:51:53,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720487808] [2020-10-16 10:51:53,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:53,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:53,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:53,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:53,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:53,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:53,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:53,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:53,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215341971] [2020-10-16 10:51:53,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:53,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:53,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:53,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:53,926 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-16 10:51:54,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:54,289 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-16 10:51:54,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:51:54,290 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:54,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:54,291 INFO L225 Difference]: With dead ends: 86 [2020-10-16 10:51:54,291 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 10:51:54,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:51:54,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 10:51:54,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-16 10:51:54,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 10:51:54,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 10:51:54,294 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-16 10:51:54,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:54,294 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 10:51:54,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:54,295 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 10:51:54,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:54,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:54,295 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:54,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 10:51:54,502 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:54,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-16 10:51:54,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:54,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446851606] [2020-10-16 10:51:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:54,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446851606] [2020-10-16 10:51:54,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514196963] [2020-10-16 10:51:54,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:54,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 10:51:54,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:54,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:54,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:54,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:54,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 10:51:54,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323881952] [2020-10-16 10:51:54,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:54,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:54,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:54,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:54,651 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-16 10:51:54,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:54,992 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-16 10:51:54,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:51:54,993 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 10:51:54,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:54,994 INFO L225 Difference]: With dead ends: 87 [2020-10-16 10:51:54,994 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 10:51:54,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:51:54,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 10:51:54,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-16 10:51:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 10:51:54,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-16 10:51:54,997 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-16 10:51:54,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:54,997 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-16 10:51:54,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-16 10:51:54,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:54,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:54,998 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:55,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:55,199 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:55,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:55,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-16 10:51:55,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:55,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387903286] [2020-10-16 10:51:55,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:55,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387903286] [2020-10-16 10:51:55,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778788893] [2020-10-16 10:51:55,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:55,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 10:51:55,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:55,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:55,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:55,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:55,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:55,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:55,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851099461] [2020-10-16 10:51:55,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:55,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:55,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:55,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:55,406 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-16 10:51:55,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:55,824 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-16 10:51:55,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:51:55,825 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:55,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:55,826 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:51:55,826 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 10:51:55,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:51:55,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 10:51:55,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-16 10:51:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:51:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-16 10:51:55,828 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-16 10:51:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:55,829 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-16 10:51:55,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:55,829 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-16 10:51:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:55,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:55,829 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:56,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 10:51:56,038 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:56,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:56,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-16 10:51:56,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:56,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953452615] [2020-10-16 10:51:56,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:56,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953452615] [2020-10-16 10:51:56,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269448853] [2020-10-16 10:51:56,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:56,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:56,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:56,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:56,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 10:51:56,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203064297] [2020-10-16 10:51:56,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:56,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:56,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:56,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:56,180 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-16 10:51:56,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:56,548 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-16 10:51:56,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:51:56,548 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 10:51:56,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:56,549 INFO L225 Difference]: With dead ends: 104 [2020-10-16 10:51:56,550 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:51:56,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:51:56,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:51:56,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-16 10:51:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:51:56,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-16 10:51:56,562 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-16 10:51:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:56,563 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-16 10:51:56,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:56,563 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-16 10:51:56,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:56,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:56,563 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:56,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 10:51:56,773 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:56,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:56,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-16 10:51:56,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:56,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394604907] [2020-10-16 10:51:56,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:56,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394604907] [2020-10-16 10:51:56,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467997332] [2020-10-16 10:51:56,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:56,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:56,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:56,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:56,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:56,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:56,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:56,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:56,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174482790] [2020-10-16 10:51:56,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:56,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:56,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:56,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:56,934 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-16 10:51:57,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:57,374 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-16 10:51:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:51:57,374 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:57,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:57,375 INFO L225 Difference]: With dead ends: 85 [2020-10-16 10:51:57,375 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 10:51:57,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:51:57,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 10:51:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-16 10:51:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 10:51:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-16 10:51:57,377 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-16 10:51:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:57,377 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-16 10:51:57,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:57,378 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-16 10:51:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:51:57,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:57,378 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:57,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 10:51:57,585 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:57,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-16 10:51:57,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:57,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042451493] [2020-10-16 10:51:57,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:57,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042451493] [2020-10-16 10:51:57,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554047177] [2020-10-16 10:51:57,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:57,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 10:51:57,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:51:57,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:57,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:57,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 10:51:57,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134394441] [2020-10-16 10:51:57,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:57,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:57,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:57,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:57,796 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-16 10:51:57,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:57,993 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-16 10:51:57,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:57,994 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 10:51:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:57,995 INFO L225 Difference]: With dead ends: 94 [2020-10-16 10:51:57,995 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 10:51:57,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:51:57,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 10:51:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-16 10:51:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:51:58,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 10:51:58,001 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 10:51:58,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:58,001 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 10:51:58,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:58,001 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 10:51:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:51:58,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:58,002 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:58,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 10:51:58,211 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:58,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:58,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-16 10:51:58,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:58,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265790415] [2020-10-16 10:51:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:58,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265790415] [2020-10-16 10:51:58,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175483716] [2020-10-16 10:51:58,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:58,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:58,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:58,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:51:58,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:58,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:58,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:58,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:51:58,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584812022] [2020-10-16 10:51:58,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:51:58,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:58,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:51:58,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:51:58,402 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 10:51:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:58,691 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-16 10:51:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:51:58,692 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:51:58,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:58,693 INFO L225 Difference]: With dead ends: 91 [2020-10-16 10:51:58,693 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 10:51:58,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:51:58,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 10:51:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-16 10:51:58,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:51:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 10:51:58,696 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 10:51:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:58,696 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 10:51:58,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:51:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 10:51:58,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:51:58,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:58,696 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:58,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-16 10:51:58,897 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:58,898 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-16 10:51:58,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:58,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350628835] [2020-10-16 10:51:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:59,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350628835] [2020-10-16 10:51:59,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222380185] [2020-10-16 10:51:59,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:59,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 10:51:59,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:59,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:51:59,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:59,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:59,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 10:51:59,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459127123] [2020-10-16 10:51:59,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:59,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:59,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:59,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:59,069 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 10:51:59,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:59,336 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-16 10:51:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:51:59,337 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 10:51:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:59,338 INFO L225 Difference]: With dead ends: 88 [2020-10-16 10:51:59,338 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 10:51:59,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:51:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 10:51:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-16 10:51:59,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:51:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 10:51:59,341 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 10:51:59,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:59,342 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 10:51:59,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:59,342 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 10:51:59,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:51:59,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:59,342 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:59,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:59,552 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:59,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:59,552 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-16 10:51:59,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:59,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324713236] [2020-10-16 10:51:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:59,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324713236] [2020-10-16 10:51:59,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474714374] [2020-10-16 10:51:59,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:59,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 10:51:59,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:59,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:51:59,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:59,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:59,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:59,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:51:59,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956656460] [2020-10-16 10:51:59,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:51:59,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:59,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:51:59,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:51:59,743 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 10:52:00,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:00,105 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-16 10:52:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:52:00,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:52:00,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:00,107 INFO L225 Difference]: With dead ends: 87 [2020-10-16 10:52:00,107 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 10:52:00,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:52:00,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 10:52:00,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-16 10:52:00,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 10:52:00,110 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 10:52:00,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:00,111 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 10:52:00,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 10:52:00,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:00,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:00,111 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:00,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:00,320 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:00,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:00,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-16 10:52:00,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:00,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985910006] [2020-10-16 10:52:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:00,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985910006] [2020-10-16 10:52:00,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375309452] [2020-10-16 10:52:00,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:00,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:00,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:00,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:00,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 10:52:00,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662005463] [2020-10-16 10:52:00,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:52:00,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:00,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:52:00,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:52:00,485 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 10:52:00,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:00,796 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-16 10:52:00,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:52:00,797 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 10:52:00,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:00,798 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:52:00,798 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 10:52:00,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:52:00,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 10:52:00,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-16 10:52:00,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:52:00,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 10:52:00,802 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 10:52:00,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:00,802 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 10:52:00,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:52:00,802 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 10:52:00,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:00,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:00,803 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:01,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-16 10:52:01,009 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:01,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:01,009 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-16 10:52:01,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:01,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172439207] [2020-10-16 10:52:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:01,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172439207] [2020-10-16 10:52:01,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373295424] [2020-10-16 10:52:01,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:01,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:01,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:01,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:01,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:01,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:01,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:01,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:52:01,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312219905] [2020-10-16 10:52:01,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:01,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:01,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:01,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:01,189 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 10:52:01,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:01,638 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-16 10:52:01,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:52:01,639 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:52:01,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:01,640 INFO L225 Difference]: With dead ends: 83 [2020-10-16 10:52:01,640 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 10:52:01,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:52:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 10:52:01,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-16 10:52:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 10:52:01,643 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 10:52:01,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:01,643 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 10:52:01,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 10:52:01,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:01,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:01,644 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:01,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:01,849 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:01,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:01,849 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-16 10:52:01,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:01,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815872814] [2020-10-16 10:52:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:01,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815872814] [2020-10-16 10:52:01,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170379673] [2020-10-16 10:52:01,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:01,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 10:52:01,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:01,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:01,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:02,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:02,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 10:52:02,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388813759] [2020-10-16 10:52:02,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:52:02,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:02,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:52:02,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:52:02,003 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 10:52:02,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:02,368 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-16 10:52:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:52:02,369 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 10:52:02,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:02,369 INFO L225 Difference]: With dead ends: 80 [2020-10-16 10:52:02,370 INFO L226 Difference]: Without dead ends: 74 [2020-10-16 10:52:02,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:52:02,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-16 10:52:02,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-16 10:52:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:52:02,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 10:52:02,372 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 10:52:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:02,372 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 10:52:02,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:52:02,372 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 10:52:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:02,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:02,373 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:02,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-16 10:52:02,574 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:02,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:02,574 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-16 10:52:02,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:02,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969997435] [2020-10-16 10:52:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:02,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969997435] [2020-10-16 10:52:02,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837401867] [2020-10-16 10:52:02,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:02,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:02,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:02,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:02,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:02,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:02,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:02,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:52:02,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477531134] [2020-10-16 10:52:02,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:02,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:02,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:02,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:02,760 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 10:52:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:03,325 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-16 10:52:03,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:52:03,325 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:52:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:03,326 INFO L225 Difference]: With dead ends: 79 [2020-10-16 10:52:03,326 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 10:52:03,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:52:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 10:52:03,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-16 10:52:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 10:52:03,329 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 10:52:03,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:03,329 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 10:52:03,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:03,329 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 10:52:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:03,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:03,330 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:03,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:03,536 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:03,537 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-16 10:52:03,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:03,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158290064] [2020-10-16 10:52:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:03,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158290064] [2020-10-16 10:52:03,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450202316] [2020-10-16 10:52:03,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:03,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 10:52:03,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:03,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:03,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:03,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:03,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 10:52:03,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290495336] [2020-10-16 10:52:03,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:52:03,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:03,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:52:03,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:52:03,710 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 10:52:04,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:04,136 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-16 10:52:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:04,136 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 10:52:04,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:04,137 INFO L225 Difference]: With dead ends: 95 [2020-10-16 10:52:04,138 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 10:52:04,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:52:04,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 10:52:04,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-16 10:52:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:52:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-16 10:52:04,139 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-16 10:52:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:04,140 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-16 10:52:04,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:52:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-16 10:52:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:04,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:04,140 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:04,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-16 10:52:04,349 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:04,349 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-16 10:52:04,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:04,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977313245] [2020-10-16 10:52:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:04,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977313245] [2020-10-16 10:52:04,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960793768] [2020-10-16 10:52:04,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:04,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 10:52:04,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:04,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:04,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:04,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:04,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:04,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:52:04,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784881280] [2020-10-16 10:52:04,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:04,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:04,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:04,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:04,514 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-16 10:52:05,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:05,039 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-16 10:52:05,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:52:05,039 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:52:05,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:05,040 INFO L225 Difference]: With dead ends: 76 [2020-10-16 10:52:05,041 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 10:52:05,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:05,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 10:52:05,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-16 10:52:05,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 10:52:05,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-16 10:52:05,044 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-16 10:52:05,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:05,044 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-16 10:52:05,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-16 10:52:05,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:05,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:05,045 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:05,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:05,254 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:05,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:05,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-16 10:52:05,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:05,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799685962] [2020-10-16 10:52:05,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:05,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799685962] [2020-10-16 10:52:05,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688880848] [2020-10-16 10:52:05,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:05,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:05,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:05,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:52:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:05,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:05,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:52:05,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442349887] [2020-10-16 10:52:05,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:05,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:05,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:05,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:05,449 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-16 10:52:05,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:05,949 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-16 10:52:05,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:05,949 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:52:05,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:05,950 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:52:05,951 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 10:52:05,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:05,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 10:52:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-16 10:52:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:52:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-16 10:52:05,953 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-16 10:52:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:05,953 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-16 10:52:05,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:05,954 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-16 10:52:05,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:05,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:05,954 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:06,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-16 10:52:06,155 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:06,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:06,156 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-16 10:52:06,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:06,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5596675] [2020-10-16 10:52:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:06,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5596675] [2020-10-16 10:52:06,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648761269] [2020-10-16 10:52:06,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:06,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:06,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:06,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:06,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:06,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:52:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:06,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:06,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:06,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773658685] [2020-10-16 10:52:06,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:06,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:06,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:06,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:06,342 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-16 10:52:06,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:06,900 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-16 10:52:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:06,900 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:06,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:06,901 INFO L225 Difference]: With dead ends: 72 [2020-10-16 10:52:06,901 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 10:52:06,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:52:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 10:52:06,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-16 10:52:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:52:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-16 10:52:06,904 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-16 10:52:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:06,904 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-16 10:52:06,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-16 10:52:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:06,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:06,905 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:07,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-16 10:52:07,113 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:07,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:07,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-16 10:52:07,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:07,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319239682] [2020-10-16 10:52:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:07,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319239682] [2020-10-16 10:52:07,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915116334] [2020-10-16 10:52:07,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:07,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 10:52:07,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:07,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:07,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:07,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:07,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:07,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314078081] [2020-10-16 10:52:07,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:07,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:07,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:07,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:07,315 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-16 10:52:07,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:07,566 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-16 10:52:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:52:07,567 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:07,568 INFO L225 Difference]: With dead ends: 78 [2020-10-16 10:52:07,568 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 10:52:07,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:52:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 10:52:07,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-16 10:52:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:52:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-16 10:52:07,572 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-16 10:52:07,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:07,572 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-16 10:52:07,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:07,572 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-16 10:52:07,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:07,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:07,573 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:07,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:07,776 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:07,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:07,776 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-16 10:52:07,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:07,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446724337] [2020-10-16 10:52:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:07,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446724337] [2020-10-16 10:52:07,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574616436] [2020-10-16 10:52:07,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:07,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:07,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:07,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:07,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:07,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:07,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:07,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:07,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835317184] [2020-10-16 10:52:07,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:07,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:07,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:07,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:07,996 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-16 10:52:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:08,284 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-16 10:52:08,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:52:08,284 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:08,285 INFO L225 Difference]: With dead ends: 90 [2020-10-16 10:52:08,285 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 10:52:08,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:52:08,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 10:52:08,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-16 10:52:08,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 10:52:08,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-16 10:52:08,288 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-16 10:52:08,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:08,288 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-16 10:52:08,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:08,289 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-16 10:52:08,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:08,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:08,289 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:08,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:08,497 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:08,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:08,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-16 10:52:08,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:08,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835092735] [2020-10-16 10:52:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:08,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835092735] [2020-10-16 10:52:08,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458270291] [2020-10-16 10:52:08,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:08,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 10:52:08,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:08,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:08,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:08,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:08,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:08,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584201878] [2020-10-16 10:52:08,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:08,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:08,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:08,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:08,697 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-16 10:52:08,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:08,984 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-16 10:52:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:52:08,985 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:08,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:08,986 INFO L225 Difference]: With dead ends: 91 [2020-10-16 10:52:08,986 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 10:52:08,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:52:08,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 10:52:08,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-16 10:52:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 10:52:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-16 10:52:08,989 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-16 10:52:08,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:08,989 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-16 10:52:08,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:08,989 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-16 10:52:08,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:08,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:08,990 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:09,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:09,191 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:09,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:09,191 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-16 10:52:09,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:09,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370764847] [2020-10-16 10:52:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:09,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370764847] [2020-10-16 10:52:09,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653084968] [2020-10-16 10:52:09,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:09,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 10:52:09,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:09,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:09,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:09,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:09,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:09,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:09,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010391820] [2020-10-16 10:52:09,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:09,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:09,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:09,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:09,447 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-16 10:52:09,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:09,803 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-16 10:52:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:52:09,804 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:09,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:09,805 INFO L225 Difference]: With dead ends: 99 [2020-10-16 10:52:09,805 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:52:09,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:52:09,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:52:09,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-16 10:52:09,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:52:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-16 10:52:09,808 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-16 10:52:09,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:09,808 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-16 10:52:09,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:09,808 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-16 10:52:09,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:09,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:09,809 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:10,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:10,009 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:10,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:10,010 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-16 10:52:10,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:10,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319584812] [2020-10-16 10:52:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:10,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319584812] [2020-10-16 10:52:10,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044684853] [2020-10-16 10:52:10,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:10,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:10,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:10,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:10,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:10,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128208869] [2020-10-16 10:52:10,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:10,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:10,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:10,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:10,208 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-16 10:52:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:10,567 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-16 10:52:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:52:10,568 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:10,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:10,569 INFO L225 Difference]: With dead ends: 99 [2020-10-16 10:52:10,569 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:52:10,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:52:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:52:10,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-16 10:52:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 10:52:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-16 10:52:10,572 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-16 10:52:10,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:10,572 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-16 10:52:10,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:10,572 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-16 10:52:10,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:10,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:10,572 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:10,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-16 10:52:10,773 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:10,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:10,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-16 10:52:10,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:10,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097660397] [2020-10-16 10:52:10,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:10,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097660397] [2020-10-16 10:52:10,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952703693] [2020-10-16 10:52:10,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:10,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:10,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:10,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:10,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:10,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:10,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:10,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:10,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721969967] [2020-10-16 10:52:10,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:10,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:10,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:10,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:10,975 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-16 10:52:11,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:11,407 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-16 10:52:11,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:52:11,408 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:11,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:11,409 INFO L225 Difference]: With dead ends: 96 [2020-10-16 10:52:11,409 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 10:52:11,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:52:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 10:52:11,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-16 10:52:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 10:52:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-16 10:52:11,412 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-16 10:52:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:11,412 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-16 10:52:11,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-16 10:52:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:11,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:11,413 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:11,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:11,614 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:11,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:11,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-16 10:52:11,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:11,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067422638] [2020-10-16 10:52:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:11,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067422638] [2020-10-16 10:52:11,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610816245] [2020-10-16 10:52:11,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:11,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 10:52:11,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:11,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:11,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:11,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:11,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:11,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760661710] [2020-10-16 10:52:11,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:11,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:11,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:11,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:11,810 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-16 10:52:12,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:12,201 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-16 10:52:12,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:12,201 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:12,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:12,202 INFO L225 Difference]: With dead ends: 97 [2020-10-16 10:52:12,203 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 10:52:12,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:52:12,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 10:52:12,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-16 10:52:12,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:52:12,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 10:52:12,205 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-16 10:52:12,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:12,205 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 10:52:12,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:12,206 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 10:52:12,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:12,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:12,206 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:12,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-16 10:52:12,407 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:12,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:12,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-16 10:52:12,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:12,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855737116] [2020-10-16 10:52:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:12,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855737116] [2020-10-16 10:52:12,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935777715] [2020-10-16 10:52:12,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:12,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:12,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:12,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:12,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:12,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:12,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:12,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:12,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564010015] [2020-10-16 10:52:12,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:12,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:12,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:12,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:12,645 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-16 10:52:13,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:13,300 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-16 10:52:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:52:13,301 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:13,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:13,301 INFO L225 Difference]: With dead ends: 94 [2020-10-16 10:52:13,302 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 10:52:13,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 10:52:13,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 10:52:13,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-16 10:52:13,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:13,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 10:52:13,304 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-16 10:52:13,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:13,305 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 10:52:13,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:13,305 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 10:52:13,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:13,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:13,306 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:13,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:13,506 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:13,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:13,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-16 10:52:13,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:13,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253214927] [2020-10-16 10:52:13,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:13,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253214927] [2020-10-16 10:52:13,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777421046] [2020-10-16 10:52:13,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:13,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 10:52:13,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:13,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:13,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:13,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:13,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:13,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467986671] [2020-10-16 10:52:13,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:13,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:13,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:13,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:13,772 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-16 10:52:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:14,282 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-16 10:52:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:52:14,283 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:14,284 INFO L225 Difference]: With dead ends: 95 [2020-10-16 10:52:14,284 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 10:52:14,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:14,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 10:52:14,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-16 10:52:14,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 10:52:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-16 10:52:14,287 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-16 10:52:14,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:14,287 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-16 10:52:14,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:14,288 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-16 10:52:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:14,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:14,288 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:14,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-16 10:52:14,498 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:14,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:14,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-16 10:52:14,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:14,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9317430] [2020-10-16 10:52:14,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:14,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9317430] [2020-10-16 10:52:14,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474299280] [2020-10-16 10:52:14,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:14,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 10:52:14,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:14,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:14,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:14,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:14,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:14,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:14,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382062081] [2020-10-16 10:52:14,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:14,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:14,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:14,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:14,695 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-16 10:52:15,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:15,218 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-16 10:52:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:52:15,219 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:15,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:15,219 INFO L225 Difference]: With dead ends: 92 [2020-10-16 10:52:15,220 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 10:52:15,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:52:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 10:52:15,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-16 10:52:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:52:15,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-16 10:52:15,225 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-16 10:52:15,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:15,225 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-16 10:52:15,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:15,225 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-16 10:52:15,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:15,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:15,226 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:15,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:15,435 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:15,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:15,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-16 10:52:15,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:15,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964283969] [2020-10-16 10:52:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:15,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964283969] [2020-10-16 10:52:15,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848459200] [2020-10-16 10:52:15,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:15,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:15,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:15,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:15,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:15,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276968665] [2020-10-16 10:52:15,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:15,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:15,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:15,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:15,600 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-16 10:52:16,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:16,076 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-16 10:52:16,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:16,077 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:16,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:16,078 INFO L225 Difference]: With dead ends: 112 [2020-10-16 10:52:16,078 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 10:52:16,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:52:16,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 10:52:16,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-16 10:52:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:52:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-16 10:52:16,081 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-16 10:52:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:16,081 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-16 10:52:16,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-16 10:52:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:16,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:16,082 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:16,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:16,288 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:16,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:16,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-16 10:52:16,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:16,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122589426] [2020-10-16 10:52:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:16,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122589426] [2020-10-16 10:52:16,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206204552] [2020-10-16 10:52:16,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:16,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:16,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:16,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:16,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:16,491 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:16,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:16,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:16,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745914896] [2020-10-16 10:52:16,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:16,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:16,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:16,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:16,515 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-16 10:52:17,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:17,145 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-16 10:52:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:52:17,145 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:17,146 INFO L225 Difference]: With dead ends: 93 [2020-10-16 10:52:17,146 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 10:52:17,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:52:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 10:52:17,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-16 10:52:17,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 10:52:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-16 10:52:17,148 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-16 10:52:17,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:17,149 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-16 10:52:17,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-16 10:52:17,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:17,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:17,149 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:17,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:17,358 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:17,358 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-16 10:52:17,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:17,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612967397] [2020-10-16 10:52:17,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:17,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612967397] [2020-10-16 10:52:17,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524728327] [2020-10-16 10:52:17,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:17,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 10:52:17,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:17,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:17,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:17,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:17,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:17,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52618856] [2020-10-16 10:52:17,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:17,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:17,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:17,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:17,577 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-16 10:52:17,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:17,867 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-16 10:52:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:52:17,868 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:17,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:17,869 INFO L225 Difference]: With dead ends: 104 [2020-10-16 10:52:17,869 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:52:17,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:52:17,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:52:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-16 10:52:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:17,872 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 10:52:17,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:17,872 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:17,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:17,872 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:17,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:17,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:17,873 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:18,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:18,083 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:18,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:18,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-16 10:52:18,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:18,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800485493] [2020-10-16 10:52:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:18,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800485493] [2020-10-16 10:52:18,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378356357] [2020-10-16 10:52:18,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:18,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:18,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:18,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:18,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:18,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:18,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:18,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:18,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060656717] [2020-10-16 10:52:18,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:18,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:18,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:18,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:18,314 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 10:52:18,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:18,675 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-16 10:52:18,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:52:18,676 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:18,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:18,677 INFO L225 Difference]: With dead ends: 101 [2020-10-16 10:52:18,677 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 10:52:18,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:52:18,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 10:52:18,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-16 10:52:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:18,680 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 10:52:18,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:18,680 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:18,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:18,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:18,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:18,680 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:18,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:18,882 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:18,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:18,882 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-16 10:52:18,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:18,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180613577] [2020-10-16 10:52:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:19,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180613577] [2020-10-16 10:52:19,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535698821] [2020-10-16 10:52:19,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:19,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 10:52:19,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:19,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:19,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:19,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:19,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:19,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932469296] [2020-10-16 10:52:19,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:19,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:19,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:19,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:19,086 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 10:52:19,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:19,424 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-16 10:52:19,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:52:19,425 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:19,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:19,426 INFO L225 Difference]: With dead ends: 98 [2020-10-16 10:52:19,426 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 10:52:19,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:52:19,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 10:52:19,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-16 10:52:19,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:19,429 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 10:52:19,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:19,429 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:19,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:19,430 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:19,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:19,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:19,430 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:19,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:19,636 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:19,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:19,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-16 10:52:19,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:19,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431458953] [2020-10-16 10:52:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:19,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431458953] [2020-10-16 10:52:19,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814233786] [2020-10-16 10:52:19,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:19,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 10:52:19,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:19,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:19,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:19,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:19,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:19,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:19,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64318400] [2020-10-16 10:52:19,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:19,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:19,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:19,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:19,885 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 10:52:20,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:20,329 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-16 10:52:20,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:52:20,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:20,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:20,331 INFO L225 Difference]: With dead ends: 97 [2020-10-16 10:52:20,331 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 10:52:20,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:52:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 10:52:20,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-16 10:52:20,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:20,335 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 10:52:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:20,335 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:20,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:20,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:20,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:20,336 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:20,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:20,545 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:20,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:20,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-16 10:52:20,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:20,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435117540] [2020-10-16 10:52:20,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:20,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435117540] [2020-10-16 10:52:20,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223897563] [2020-10-16 10:52:20,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:20,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:20,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:20,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:20,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:20,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911756274] [2020-10-16 10:52:20,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:20,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:20,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:20,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:20,744 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 10:52:21,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:21,124 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-16 10:52:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:52:21,125 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:21,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:21,126 INFO L225 Difference]: With dead ends: 94 [2020-10-16 10:52:21,126 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 10:52:21,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:52:21,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 10:52:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-16 10:52:21,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:21,131 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 10:52:21,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:21,132 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:21,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:21,132 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:21,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:21,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:21,132 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:21,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-16 10:52:21,340 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:21,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:21,340 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-16 10:52:21,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:21,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971127436] [2020-10-16 10:52:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:21,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971127436] [2020-10-16 10:52:21,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301707705] [2020-10-16 10:52:21,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:21,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:21,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:21,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:21,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:21,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:21,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:21,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:21,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379676818] [2020-10-16 10:52:21,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:21,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:21,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:21,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:21,550 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 10:52:22,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:22,066 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-16 10:52:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:52:22,067 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:22,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:22,068 INFO L225 Difference]: With dead ends: 93 [2020-10-16 10:52:22,068 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 10:52:22,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 10:52:22,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-16 10:52:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:22,070 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 10:52:22,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:22,070 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:22,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:22,070 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:22,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:22,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:22,071 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:22,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:22,272 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:22,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:22,272 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-16 10:52:22,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:22,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117581711] [2020-10-16 10:52:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:22,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117581711] [2020-10-16 10:52:22,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399815245] [2020-10-16 10:52:22,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:22,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 10:52:22,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:22,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:22,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:22,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:22,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:22,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001804817] [2020-10-16 10:52:22,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:22,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:22,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:22,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:22,458 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 10:52:22,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:22,898 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-16 10:52:22,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:22,899 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:22,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:22,900 INFO L225 Difference]: With dead ends: 90 [2020-10-16 10:52:22,900 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 10:52:22,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 10:52:22,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 10:52:22,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-16 10:52:22,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:22,903 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 10:52:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:22,903 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:22,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:22,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:22,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:22,904 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:23,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-16 10:52:23,105 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:23,105 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-16 10:52:23,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:23,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146891088] [2020-10-16 10:52:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:23,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146891088] [2020-10-16 10:52:23,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167509364] [2020-10-16 10:52:23,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:23,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:23,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:23,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:23,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:23,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:23,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:23,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:23,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196147905] [2020-10-16 10:52:23,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:23,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:23,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:23,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:23,312 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 10:52:23,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:23,874 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-16 10:52:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:52:23,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:23,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:23,876 INFO L225 Difference]: With dead ends: 89 [2020-10-16 10:52:23,876 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 10:52:23,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:52:23,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 10:52:23,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-16 10:52:23,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:23,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:23,878 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 10:52:23,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:23,879 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:23,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:23,879 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:23,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:23,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:23,880 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:24,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:24,088 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:24,089 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-16 10:52:24,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:24,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526293168] [2020-10-16 10:52:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:24,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526293168] [2020-10-16 10:52:24,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943344510] [2020-10-16 10:52:24,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:24,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 10:52:24,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:24,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:24,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:24,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:24,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:24,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350321184] [2020-10-16 10:52:24,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:24,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:24,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:24,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:24,308 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 10:52:24,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:24,813 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-16 10:52:24,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:52:24,813 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:24,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:24,814 INFO L225 Difference]: With dead ends: 86 [2020-10-16 10:52:24,814 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 10:52:24,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:52:24,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 10:52:24,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-16 10:52:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:24,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:24,817 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 10:52:24,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:24,817 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:24,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:24,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:24,818 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:25,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:25,027 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:25,027 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-16 10:52:25,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:25,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015290783] [2020-10-16 10:52:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:25,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015290783] [2020-10-16 10:52:25,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029610406] [2020-10-16 10:52:25,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:25,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 10:52:25,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:25,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:25,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:25,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:25,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:25,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:25,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933694916] [2020-10-16 10:52:25,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:25,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:25,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:25,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:25,240 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 10:52:25,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:25,905 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-16 10:52:25,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:52:25,906 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:25,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:25,907 INFO L225 Difference]: With dead ends: 85 [2020-10-16 10:52:25,907 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 10:52:25,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:52:25,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 10:52:25,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-16 10:52:25,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:25,909 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 10:52:25,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:25,910 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:25,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:25,910 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:25,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:25,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:25,910 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:26,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:26,116 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:26,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:26,116 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-16 10:52:26,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:26,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185616478] [2020-10-16 10:52:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:26,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185616478] [2020-10-16 10:52:26,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570310101] [2020-10-16 10:52:26,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:26,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:26,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:26,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:26,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:26,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721945693] [2020-10-16 10:52:26,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:26,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:26,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:26,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:26,302 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 10:52:26,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:26,838 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-16 10:52:26,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:26,839 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:26,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:26,840 INFO L225 Difference]: With dead ends: 101 [2020-10-16 10:52:26,840 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 10:52:26,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:52:26,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 10:52:26,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-16 10:52:26,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 10:52:26,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-16 10:52:26,843 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-16 10:52:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:26,843 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-16 10:52:26,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:26,844 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-16 10:52:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:26,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:26,844 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:27,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:27,045 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:27,046 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-16 10:52:27,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:27,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826248124] [2020-10-16 10:52:27,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:27,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826248124] [2020-10-16 10:52:27,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73545297] [2020-10-16 10:52:27,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:27,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:27,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:27,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:27,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:27,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:27,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:27,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:27,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130291259] [2020-10-16 10:52:27,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:27,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:27,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:27,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:27,246 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-16 10:52:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:27,946 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-10-16 10:52:27,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:52:27,947 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:27,948 INFO L225 Difference]: With dead ends: 82 [2020-10-16 10:52:27,948 INFO L226 Difference]: Without dead ends: 74 [2020-10-16 10:52:27,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:52:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-16 10:52:27,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-16 10:52:27,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 10:52:27,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-16 10:52:27,952 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-16 10:52:27,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:27,952 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-16 10:52:27,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:27,952 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-16 10:52:27,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:27,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:27,953 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:28,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:28,162 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:28,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:28,162 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-16 10:52:28,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:28,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674119287] [2020-10-16 10:52:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:28,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674119287] [2020-10-16 10:52:28,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835878259] [2020-10-16 10:52:28,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:28,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 10:52:28,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:28,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:28,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:28,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:52:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:28,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:28,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:28,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314233597] [2020-10-16 10:52:28,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:28,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:28,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:28,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:28,368 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-16 10:52:29,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:29,020 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-16 10:52:29,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:29,021 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:29,022 INFO L225 Difference]: With dead ends: 92 [2020-10-16 10:52:29,022 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 10:52:29,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:52:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 10:52:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-16 10:52:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:52:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-16 10:52:29,024 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-16 10:52:29,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:29,025 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-16 10:52:29,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:29,025 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-16 10:52:29,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:29,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:29,026 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:29,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:29,233 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:29,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:29,233 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-16 10:52:29,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:29,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580726606] [2020-10-16 10:52:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:29,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580726606] [2020-10-16 10:52:29,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907250124] [2020-10-16 10:52:29,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:29,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:29,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:29,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:29,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:29,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:52:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:29,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:29,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:29,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589737007] [2020-10-16 10:52:29,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:29,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:29,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:29,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:29,463 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-16 10:52:30,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:30,174 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-16 10:52:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:30,174 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:30,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:30,175 INFO L225 Difference]: With dead ends: 78 [2020-10-16 10:52:30,175 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 10:52:30,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:52:30,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 10:52:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-16 10:52:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 10:52:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-16 10:52:30,177 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-16 10:52:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:30,178 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-16 10:52:30,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-16 10:52:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:30,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:30,178 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:30,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-16 10:52:30,386 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:30,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:30,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-16 10:52:30,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:30,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367403017] [2020-10-16 10:52:30,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:30,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367403017] [2020-10-16 10:52:30,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125159735] [2020-10-16 10:52:30,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:30,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 10:52:30,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:30,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:30,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:30,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:30,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:30,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110168057] [2020-10-16 10:52:30,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:30,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:30,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:30,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:30,638 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-16 10:52:30,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:30,943 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-16 10:52:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:52:30,944 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:30,945 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:52:30,945 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 10:52:30,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:52:30,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 10:52:30,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-16 10:52:30,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-16 10:52:30,948 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-16 10:52:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:30,948 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-16 10:52:30,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-16 10:52:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:30,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:30,949 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:31,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:31,150 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:31,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:31,150 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-16 10:52:31,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:31,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059179578] [2020-10-16 10:52:31,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:31,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059179578] [2020-10-16 10:52:31,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893341418] [2020-10-16 10:52:31,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:31,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 10:52:31,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:31,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:31,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:31,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:31,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:31,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:31,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331483808] [2020-10-16 10:52:31,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:31,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:31,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:31,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:31,418 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-16 10:52:31,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:31,745 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-16 10:52:31,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:52:31,746 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:31,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:31,747 INFO L225 Difference]: With dead ends: 98 [2020-10-16 10:52:31,747 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 10:52:31,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:52:31,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 10:52:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-16 10:52:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 10:52:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-16 10:52:31,750 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-16 10:52:31,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:31,750 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-16 10:52:31,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:31,750 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-16 10:52:31,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:31,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:31,751 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:31,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-16 10:52:31,951 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:31,952 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-16 10:52:31,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:31,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143189744] [2020-10-16 10:52:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:32,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143189744] [2020-10-16 10:52:32,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823631829] [2020-10-16 10:52:32,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:32,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:32,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:32,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:32,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:32,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123458669] [2020-10-16 10:52:32,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:32,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:32,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:32,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:32,199 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-16 10:52:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:32,639 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-16 10:52:32,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:52:32,640 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:32,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:32,641 INFO L225 Difference]: With dead ends: 99 [2020-10-16 10:52:32,642 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:52:32,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:52:32,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:52:32,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-16 10:52:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:52:32,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-16 10:52:32,645 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-16 10:52:32,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:32,646 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-16 10:52:32,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:32,646 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-16 10:52:32,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:32,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:32,647 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:32,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:32,848 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:32,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:32,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-16 10:52:32,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:32,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946547128] [2020-10-16 10:52:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:33,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946547128] [2020-10-16 10:52:33,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830893823] [2020-10-16 10:52:33,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:33,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:33,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:33,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:33,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:33,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:33,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:33,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:33,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402084588] [2020-10-16 10:52:33,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:33,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:33,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:33,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:33,222 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-16 10:52:33,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:33,702 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-16 10:52:33,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:52:33,703 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:33,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:33,704 INFO L225 Difference]: With dead ends: 109 [2020-10-16 10:52:33,704 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 10:52:33,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 10:52:33,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 10:52:33,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-16 10:52:33,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-16 10:52:33,709 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-16 10:52:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:33,709 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-16 10:52:33,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-16 10:52:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:33,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:33,710 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:33,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:33,919 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:33,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:33,919 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-16 10:52:33,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:33,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184231114] [2020-10-16 10:52:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:34,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184231114] [2020-10-16 10:52:34,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348992579] [2020-10-16 10:52:34,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:34,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 10:52:34,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:34,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:34,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:34,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:34,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:34,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091487385] [2020-10-16 10:52:34,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:34,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:34,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:34,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:34,152 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-16 10:52:34,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:34,594 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-16 10:52:34,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:34,595 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:34,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:34,596 INFO L225 Difference]: With dead ends: 109 [2020-10-16 10:52:34,596 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 10:52:34,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:34,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 10:52:34,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-16 10:52:34,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 10:52:34,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-16 10:52:34,600 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-16 10:52:34,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:34,600 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-16 10:52:34,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:34,600 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-16 10:52:34,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:34,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:34,602 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:34,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-16 10:52:34,810 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:34,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:34,810 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-16 10:52:34,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:34,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732108344] [2020-10-16 10:52:34,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:34,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732108344] [2020-10-16 10:52:34,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593785155] [2020-10-16 10:52:34,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:35,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:35,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:35,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:35,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:35,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:35,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:35,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:35,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30624120] [2020-10-16 10:52:35,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:35,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:35,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:35,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:35,068 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-16 10:52:35,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:35,591 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-16 10:52:35,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:52:35,591 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:35,593 INFO L225 Difference]: With dead ends: 106 [2020-10-16 10:52:35,593 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 10:52:35,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:52:35,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 10:52:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-16 10:52:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:52:35,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-16 10:52:35,596 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-16 10:52:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:35,597 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-16 10:52:35,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-16 10:52:35,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:35,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:35,597 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:35,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 10:52:35,806 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:35,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:35,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-16 10:52:35,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:35,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784348634] [2020-10-16 10:52:35,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:35,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784348634] [2020-10-16 10:52:35,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363314814] [2020-10-16 10:52:35,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:36,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 10:52:36,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:36,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:36,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:36,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:36,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:36,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477995209] [2020-10-16 10:52:36,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:36,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:36,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:36,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:36,036 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-16 10:52:36,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:36,531 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-16 10:52:36,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:52:36,531 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:36,533 INFO L225 Difference]: With dead ends: 107 [2020-10-16 10:52:36,533 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:52:36,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:52:36,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:52:36,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-16 10:52:36,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 10:52:36,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-16 10:52:36,535 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-16 10:52:36,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:36,535 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-16 10:52:36,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:36,536 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-16 10:52:36,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:36,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:36,536 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:36,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:36,743 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:36,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-16 10:52:36,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:36,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888191973] [2020-10-16 10:52:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:36,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888191973] [2020-10-16 10:52:36,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327689139] [2020-10-16 10:52:36,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:36,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 10:52:36,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:36,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:36,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:36,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:36,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:36,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:36,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774638968] [2020-10-16 10:52:36,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:36,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:36,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:36,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:36,988 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-16 10:52:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:37,571 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-16 10:52:37,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:52:37,572 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:37,573 INFO L225 Difference]: With dead ends: 104 [2020-10-16 10:52:37,573 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:52:37,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:52:37,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:52:37,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-16 10:52:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:52:37,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-16 10:52:37,576 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-16 10:52:37,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:37,576 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-16 10:52:37,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:37,576 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-16 10:52:37,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:37,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:37,577 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:37,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 10:52:37,778 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:37,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:37,778 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-16 10:52:37,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:37,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976246451] [2020-10-16 10:52:37,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:37,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976246451] [2020-10-16 10:52:37,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742607258] [2020-10-16 10:52:37,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:37,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:37,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:37,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:37,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:37,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934918202] [2020-10-16 10:52:37,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:37,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:37,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:37,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:37,981 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-16 10:52:38,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:38,495 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-16 10:52:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:38,496 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:38,497 INFO L225 Difference]: With dead ends: 105 [2020-10-16 10:52:38,497 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 10:52:38,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:52:38,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 10:52:38,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-16 10:52:38,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:38,500 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-16 10:52:38,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:38,501 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:38,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:38,501 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:38,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:38,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:38,501 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:38,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:38,707 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:38,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:38,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-16 10:52:38,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:38,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693700675] [2020-10-16 10:52:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:38,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693700675] [2020-10-16 10:52:38,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239872010] [2020-10-16 10:52:38,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:38,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:38,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:38,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:38,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:38,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:38,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:38,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:38,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87997788] [2020-10-16 10:52:38,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:38,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:38,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:38,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:38,941 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-16 10:52:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:39,578 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-16 10:52:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:52:39,579 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:39,580 INFO L225 Difference]: With dead ends: 102 [2020-10-16 10:52:39,580 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 10:52:39,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:52:39,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 10:52:39,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-16 10:52:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:39,583 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-16 10:52:39,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:39,583 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:39,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:39,583 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:39,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:39,583 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:39,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-16 10:52:39,784 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:39,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:39,785 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-16 10:52:39,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:39,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540578093] [2020-10-16 10:52:39,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:39,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540578093] [2020-10-16 10:52:39,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123892498] [2020-10-16 10:52:39,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:39,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 10:52:39,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:39,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:39,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:39,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:39,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:39,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443462402] [2020-10-16 10:52:39,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:39,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:39,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:39,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:39,985 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-16 10:52:40,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:40,550 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-16 10:52:40,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:52:40,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:40,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:40,552 INFO L225 Difference]: With dead ends: 103 [2020-10-16 10:52:40,552 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 10:52:40,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:52:40,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 10:52:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-16 10:52:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 10:52:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-16 10:52:40,555 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-16 10:52:40,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:40,555 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-16 10:52:40,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-16 10:52:40,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:40,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:40,556 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:40,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:40,757 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:40,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:40,757 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-16 10:52:40,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:40,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824178684] [2020-10-16 10:52:40,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:40,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824178684] [2020-10-16 10:52:40,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005464761] [2020-10-16 10:52:40,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:40,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:40,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:40,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:40,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:40,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:40,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:40,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:40,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440864950] [2020-10-16 10:52:40,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:40,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:40,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:40,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:40,974 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-16 10:52:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:41,701 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-16 10:52:41,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:52:41,701 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:41,702 INFO L225 Difference]: With dead ends: 100 [2020-10-16 10:52:41,702 INFO L226 Difference]: Without dead ends: 94 [2020-10-16 10:52:41,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:52:41,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-16 10:52:41,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-16 10:52:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:52:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-16 10:52:41,706 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-16 10:52:41,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:41,706 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-16 10:52:41,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-16 10:52:41,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:41,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:41,707 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:41,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 10:52:41,915 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:41,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:41,915 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-16 10:52:41,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:41,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725297477] [2020-10-16 10:52:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:42,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725297477] [2020-10-16 10:52:42,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883828315] [2020-10-16 10:52:42,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:42,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 10:52:42,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:42,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:42,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:42,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:42,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:42,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767918799] [2020-10-16 10:52:42,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:42,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:42,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:42,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:42,168 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-16 10:52:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:42,840 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-16 10:52:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:52:42,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:42,841 INFO L225 Difference]: With dead ends: 120 [2020-10-16 10:52:42,842 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 10:52:42,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:52:42,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 10:52:42,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-16 10:52:42,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:52:42,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-16 10:52:42,848 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-16 10:52:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:42,849 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-16 10:52:42,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:42,849 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-16 10:52:42,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:42,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:42,850 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:43,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-16 10:52:43,057 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:43,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:43,058 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-16 10:52:43,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:43,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117727909] [2020-10-16 10:52:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:43,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117727909] [2020-10-16 10:52:43,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681088025] [2020-10-16 10:52:43,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:43,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 10:52:43,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:43,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:43,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:43,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:43,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:43,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:43,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699416811] [2020-10-16 10:52:43,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:43,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:43,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:43,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:43,369 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-16 10:52:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:44,271 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-16 10:52:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:52:44,272 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:44,273 INFO L225 Difference]: With dead ends: 101 [2020-10-16 10:52:44,273 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:52:44,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:52:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:52:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-16 10:52:44,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 10:52:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-16 10:52:44,276 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-16 10:52:44,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:44,276 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-16 10:52:44,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:44,276 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-16 10:52:44,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:44,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:44,277 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:44,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:44,485 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:44,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:44,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-16 10:52:44,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:44,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853229652] [2020-10-16 10:52:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:44,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853229652] [2020-10-16 10:52:44,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340541711] [2020-10-16 10:52:44,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:44,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:44,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:44,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:44,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:44,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145948489] [2020-10-16 10:52:44,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:44,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:44,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:44,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:44,765 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-16 10:52:45,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:45,129 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-16 10:52:45,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:52:45,129 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:45,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:45,130 INFO L225 Difference]: With dead ends: 114 [2020-10-16 10:52:45,130 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 10:52:45,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:52:45,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 10:52:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-16 10:52:45,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:45,133 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:45,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:45,133 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:45,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:45,134 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:45,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:45,134 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:45,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:45,336 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:45,336 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-16 10:52:45,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:45,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546270587] [2020-10-16 10:52:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:45,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546270587] [2020-10-16 10:52:45,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704970618] [2020-10-16 10:52:45,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:45,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:45,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:45,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:45,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:45,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:45,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:45,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:45,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588475014] [2020-10-16 10:52:45,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:45,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:45,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:45,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:45,622 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:46,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:46,067 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-16 10:52:46,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:52:46,068 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:46,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:46,068 INFO L225 Difference]: With dead ends: 111 [2020-10-16 10:52:46,069 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 10:52:46,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:46,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 10:52:46,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-16 10:52:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:46,071 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:46,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:46,071 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:46,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:46,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:46,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:46,072 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:46,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 10:52:46,281 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:46,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:46,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-16 10:52:46,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:46,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290905551] [2020-10-16 10:52:46,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:46,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290905551] [2020-10-16 10:52:46,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815611100] [2020-10-16 10:52:46,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:46,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 10:52:46,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:46,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:46,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:46,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:46,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:46,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026834898] [2020-10-16 10:52:46,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:46,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:46,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:46,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:46,541 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:46,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:46,950 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-16 10:52:46,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:52:46,951 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:46,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:46,951 INFO L225 Difference]: With dead ends: 108 [2020-10-16 10:52:46,951 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 10:52:46,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 10:52:46,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 10:52:46,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-16 10:52:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:46,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:46,956 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:46,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:46,956 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:46,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:46,957 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:46,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:46,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:46,957 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:47,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:47,166 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:47,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:47,166 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-16 10:52:47,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:47,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368396596] [2020-10-16 10:52:47,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:47,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368396596] [2020-10-16 10:52:47,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816376298] [2020-10-16 10:52:47,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:47,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:47,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:47,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:47,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:47,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:47,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:47,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:47,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113896681] [2020-10-16 10:52:47,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:47,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:47,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:47,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:47,436 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:47,959 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-16 10:52:47,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:52:47,960 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:47,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:47,960 INFO L225 Difference]: With dead ends: 107 [2020-10-16 10:52:47,960 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:52:47,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:52:47,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:52:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-16 10:52:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:47,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:47,963 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:47,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:47,963 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:47,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:47,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:47,964 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:48,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-16 10:52:48,165 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:48,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:48,165 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-16 10:52:48,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:48,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494239974] [2020-10-16 10:52:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:48,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494239974] [2020-10-16 10:52:48,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199924222] [2020-10-16 10:52:48,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:48,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 10:52:48,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:48,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:48,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:48,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:48,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:48,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917480970] [2020-10-16 10:52:48,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:48,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:48,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:48,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:48,408 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:48,895 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-16 10:52:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:48,896 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:48,897 INFO L225 Difference]: With dead ends: 104 [2020-10-16 10:52:48,897 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:52:48,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:52:48,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:52:48,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-16 10:52:48,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:48,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:48,901 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:48,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:48,901 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:48,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:48,901 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:48,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:48,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:48,902 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:49,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 10:52:49,111 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:49,111 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-16 10:52:49,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:49,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258656606] [2020-10-16 10:52:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:49,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258656606] [2020-10-16 10:52:49,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181737024] [2020-10-16 10:52:49,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:49,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 10:52:49,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:49,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:49,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:49,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:49,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:49,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:49,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297064945] [2020-10-16 10:52:49,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:49,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:49,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:49,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:49,382 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:50,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:50,004 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-16 10:52:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:52:50,005 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:50,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:50,006 INFO L225 Difference]: With dead ends: 103 [2020-10-16 10:52:50,006 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 10:52:50,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:52:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 10:52:50,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-16 10:52:50,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:50,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:50,009 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:50,010 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:50,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:50,010 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:50,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:50,010 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:50,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-16 10:52:50,216 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:50,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:50,216 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-16 10:52:50,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:50,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464128692] [2020-10-16 10:52:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:50,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464128692] [2020-10-16 10:52:50,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331896001] [2020-10-16 10:52:50,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:50,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:50,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:50,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:50,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:50,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623368968] [2020-10-16 10:52:50,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:50,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:50,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:50,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:50,454 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:50,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:50,999 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-16 10:52:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:52:51,000 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:51,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:51,000 INFO L225 Difference]: With dead ends: 100 [2020-10-16 10:52:51,000 INFO L226 Difference]: Without dead ends: 94 [2020-10-16 10:52:51,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:52:51,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-16 10:52:51,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-16 10:52:51,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:51,002 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:51,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:51,003 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:51,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:51,003 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:51,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:51,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:51,003 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:51,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:51,207 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:51,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-16 10:52:51,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:51,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499978945] [2020-10-16 10:52:51,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:51,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499978945] [2020-10-16 10:52:51,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738157337] [2020-10-16 10:52:51,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:51,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:51,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:51,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:51,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:51,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:51,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:51,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:51,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403405035] [2020-10-16 10:52:51,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:51,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:51,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:51,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:51,467 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:52,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:52,170 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-16 10:52:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:52:52,171 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:52,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:52,172 INFO L225 Difference]: With dead ends: 99 [2020-10-16 10:52:52,172 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:52:52,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:52:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:52:52,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-16 10:52:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:52,174 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:52,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:52,175 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:52,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:52,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:52,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:52,177 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:52,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-16 10:52:52,386 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:52,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:52,386 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-16 10:52:52,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:52,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714713045] [2020-10-16 10:52:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:52,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714713045] [2020-10-16 10:52:52,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450026812] [2020-10-16 10:52:52,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:52,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 10:52:52,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:52,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:52,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:52,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:52,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:52,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693186057] [2020-10-16 10:52:52,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:52,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:52,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:52,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:52,624 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:53,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:53,224 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-16 10:52:53,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:53,224 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:53,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:53,225 INFO L225 Difference]: With dead ends: 96 [2020-10-16 10:52:53,225 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 10:52:53,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:52:53,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 10:52:53,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-16 10:52:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:53,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:53,228 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:53,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:53,229 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:53,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:53,229 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:53,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:53,230 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:53,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:53,434 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:53,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:53,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-16 10:52:53,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:53,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105131255] [2020-10-16 10:52:53,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:53,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105131255] [2020-10-16 10:52:53,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343982314] [2020-10-16 10:52:53,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:53,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:53,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:53,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:53,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:53,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:53,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:53,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:53,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012439807] [2020-10-16 10:52:53,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:53,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:53,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:53,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:53,700 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:54,496 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-16 10:52:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:52:54,497 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:54,497 INFO L225 Difference]: With dead ends: 95 [2020-10-16 10:52:54,498 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 10:52:54,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:52:54,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 10:52:54,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-16 10:52:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:54,500 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:54,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:54,500 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:54,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:54,500 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:54,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:54,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:54,501 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:54,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:54,701 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:54,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-16 10:52:54,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:54,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235996874] [2020-10-16 10:52:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:54,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235996874] [2020-10-16 10:52:54,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730836754] [2020-10-16 10:52:54,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:54,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 10:52:54,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:54,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:54,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:54,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:54,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:54,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983794084] [2020-10-16 10:52:54,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:54,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:54,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:54,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:54,989 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:55,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:55,652 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-16 10:52:55,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:52:55,653 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:55,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:55,653 INFO L225 Difference]: With dead ends: 92 [2020-10-16 10:52:55,653 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 10:52:55,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:52:55,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 10:52:55,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-16 10:52:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:55,657 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:55,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:55,657 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:55,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:55,658 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:55,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:55,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:55,659 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:55,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:55,867 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:55,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:55,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-16 10:52:55,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:55,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534659723] [2020-10-16 10:52:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:56,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534659723] [2020-10-16 10:52:56,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748620338] [2020-10-16 10:52:56,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:56,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 10:52:56,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:56,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:56,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:56,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:56,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:56,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:56,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068766138] [2020-10-16 10:52:56,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:56,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:56,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:56,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:56,107 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:57,004 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-16 10:52:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:52:57,005 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:57,006 INFO L225 Difference]: With dead ends: 91 [2020-10-16 10:52:57,006 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 10:52:57,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:52:57,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 10:52:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-16 10:52:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:57,009 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:57,010 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:57,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:57,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:57,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:57,011 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:57,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:57,211 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:57,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:57,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-16 10:52:57,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:57,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989208556] [2020-10-16 10:52:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:57,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989208556] [2020-10-16 10:52:57,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844625158] [2020-10-16 10:52:57,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:57,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:57,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:57,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:57,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:57,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541925506] [2020-10-16 10:52:57,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:57,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:57,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:57,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:57,464 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:58,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:58,173 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-16 10:52:58,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:52:58,173 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:58,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:58,174 INFO L225 Difference]: With dead ends: 107 [2020-10-16 10:52:58,174 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:52:58,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:52:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:52:58,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-16 10:52:58,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 10:52:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-16 10:52:58,177 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-16 10:52:58,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:58,177 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-16 10:52:58,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:58,177 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-16 10:52:58,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:58,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:58,177 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:58,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-16 10:52:58,378 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:58,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:58,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-16 10:52:58,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:58,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987230159] [2020-10-16 10:52:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:58,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987230159] [2020-10-16 10:52:58,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145780458] [2020-10-16 10:52:58,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:58,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:58,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:58,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:58,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:58,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:58,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:58,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:58,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929326196] [2020-10-16 10:52:58,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:58,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:58,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:58,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:58,621 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-16 10:52:59,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:59,533 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-16 10:52:59,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:52:59,534 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:59,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:59,535 INFO L225 Difference]: With dead ends: 88 [2020-10-16 10:52:59,535 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 10:52:59,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:52:59,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 10:52:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-16 10:52:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 10:52:59,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-16 10:52:59,537 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-16 10:52:59,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:59,538 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-16 10:52:59,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:59,538 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-16 10:52:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:59,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:59,538 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:59,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-16 10:52:59,742 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:59,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:59,742 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-16 10:52:59,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:59,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834494713] [2020-10-16 10:52:59,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:59,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834494713] [2020-10-16 10:52:59,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922003479] [2020-10-16 10:52:59,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:59,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 10:52:59,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:59,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:59,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:59,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:52:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:59,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:59,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:59,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583467453] [2020-10-16 10:52:59,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:59,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:59,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:59,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:59,988 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-16 10:53:00,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:00,841 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-16 10:53:00,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:53:00,842 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:53:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:00,842 INFO L225 Difference]: With dead ends: 100 [2020-10-16 10:53:00,842 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 10:53:00,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:53:00,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 10:53:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-16 10:53:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:53:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-16 10:53:00,845 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-16 10:53:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:00,845 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-16 10:53:00,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-16 10:53:00,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:00,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:00,845 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:01,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-16 10:53:01,046 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:01,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:01,047 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-16 10:53:01,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:01,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805375756] [2020-10-16 10:53:01,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:01,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805375756] [2020-10-16 10:53:01,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92431368] [2020-10-16 10:53:01,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:01,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:01,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:01,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:01,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:01,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:53:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:01,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:01,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:01,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422945723] [2020-10-16 10:53:01,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:01,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:01,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:01,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:01,313 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-16 10:53:02,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:02,261 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-16 10:53:02,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:53:02,262 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:02,262 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:53:02,262 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 10:53:02,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:53:02,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 10:53:02,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-16 10:53:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:53:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-16 10:53:02,265 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-16 10:53:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:02,265 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-16 10:53:02,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:02,265 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-16 10:53:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:02,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:02,266 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:02,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 10:53:02,470 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:02,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:02,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-16 10:53:02,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:02,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966530673] [2020-10-16 10:53:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:02,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966530673] [2020-10-16 10:53:02,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991432257] [2020-10-16 10:53:02,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:02,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:02,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:02,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:02,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:02,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:02,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:02,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713956250] [2020-10-16 10:53:02,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:02,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:02,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:02,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:02,766 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-16 10:53:03,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:03,154 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-16 10:53:03,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:53:03,154 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:03,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:03,155 INFO L225 Difference]: With dead ends: 90 [2020-10-16 10:53:03,155 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 10:53:03,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:53:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 10:53:03,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-16 10:53:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:53:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-16 10:53:03,158 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-16 10:53:03,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:03,158 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-16 10:53:03,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-16 10:53:03,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:03,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:03,159 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:03,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:03,361 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:03,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:03,362 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-16 10:53:03,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:03,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483081096] [2020-10-16 10:53:03,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:03,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483081096] [2020-10-16 10:53:03,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670453978] [2020-10-16 10:53:03,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:03,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:03,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:03,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:03,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:03,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:03,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:03,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:03,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335146701] [2020-10-16 10:53:03,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:03,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:03,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:03,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:03,686 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-16 10:53:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:04,098 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-16 10:53:04,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:53:04,099 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:04,100 INFO L225 Difference]: With dead ends: 106 [2020-10-16 10:53:04,100 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 10:53:04,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:53:04,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 10:53:04,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-16 10:53:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:53:04,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-16 10:53:04,103 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-16 10:53:04,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:04,103 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-16 10:53:04,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:04,103 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-16 10:53:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:04,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:04,109 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:04,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-16 10:53:04,313 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:04,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:04,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-16 10:53:04,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:04,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970522555] [2020-10-16 10:53:04,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:04,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970522555] [2020-10-16 10:53:04,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637402534] [2020-10-16 10:53:04,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:04,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:04,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:04,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:04,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:04,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662738409] [2020-10-16 10:53:04,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:04,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:04,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:04,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:04,600 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-16 10:53:05,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:05,065 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-16 10:53:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:53:05,066 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:05,066 INFO L225 Difference]: With dead ends: 107 [2020-10-16 10:53:05,066 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:53:05,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:53:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:53:05,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-16 10:53:05,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 10:53:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-16 10:53:05,069 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-16 10:53:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:05,070 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-16 10:53:05,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:05,070 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-16 10:53:05,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:05,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:05,070 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:05,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-16 10:53:05,279 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:05,279 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-16 10:53:05,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:05,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800418601] [2020-10-16 10:53:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:05,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800418601] [2020-10-16 10:53:05,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62335562] [2020-10-16 10:53:05,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:05,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:05,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:05,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:05,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:05,581 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:05,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:05,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:05,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498335601] [2020-10-16 10:53:05,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:05,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:05,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:05,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:05,593 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-16 10:53:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:06,114 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-16 10:53:06,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:53:06,115 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:06,115 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:53:06,115 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:53:06,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:53:06,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:53:06,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-16 10:53:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:53:06,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-16 10:53:06,118 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-16 10:53:06,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:06,119 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-16 10:53:06,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-16 10:53:06,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:06,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:06,119 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:06,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-16 10:53:06,320 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:06,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:06,321 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-16 10:53:06,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:06,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830623002] [2020-10-16 10:53:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:06,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830623002] [2020-10-16 10:53:06,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620089617] [2020-10-16 10:53:06,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:06,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 10:53:06,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:06,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:06,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:06,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:06,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:06,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530459831] [2020-10-16 10:53:06,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:06,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:06,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:06,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:06,601 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-16 10:53:07,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:07,123 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-16 10:53:07,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:53:07,123 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:07,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:07,124 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:53:07,124 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:53:07,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:53:07,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:53:07,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-16 10:53:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:53:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-16 10:53:07,127 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-16 10:53:07,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:07,127 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-16 10:53:07,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:07,127 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-16 10:53:07,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:07,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:07,128 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:07,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:07,334 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:07,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:07,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-16 10:53:07,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:07,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127455990] [2020-10-16 10:53:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:07,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127455990] [2020-10-16 10:53:07,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775337019] [2020-10-16 10:53:07,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:07,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:07,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:07,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:07,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:07,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:07,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:07,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:07,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664857755] [2020-10-16 10:53:07,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:07,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:07,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:07,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:07,636 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-16 10:53:08,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:08,239 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-16 10:53:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:53:08,239 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:08,240 INFO L225 Difference]: With dead ends: 116 [2020-10-16 10:53:08,240 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 10:53:08,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:53:08,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 10:53:08,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-16 10:53:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:53:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-16 10:53:08,243 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-16 10:53:08,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:08,243 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-16 10:53:08,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:08,243 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-16 10:53:08,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:08,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:08,244 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:08,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:08,445 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:08,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:08,446 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-16 10:53:08,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:08,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013389670] [2020-10-16 10:53:08,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:08,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013389670] [2020-10-16 10:53:08,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981733520] [2020-10-16 10:53:08,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:08,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:08,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:08,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:08,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:08,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:08,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:08,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102436847] [2020-10-16 10:53:08,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:08,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:08,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:08,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:08,784 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-16 10:53:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:09,348 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-16 10:53:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:53:09,353 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:09,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:09,354 INFO L225 Difference]: With dead ends: 117 [2020-10-16 10:53:09,354 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 10:53:09,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:53:09,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 10:53:09,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-16 10:53:09,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 10:53:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-16 10:53:09,356 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-16 10:53:09,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:09,357 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-16 10:53:09,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:09,357 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-16 10:53:09,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:09,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:09,357 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:09,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:09,559 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:09,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:09,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-16 10:53:09,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:09,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331569991] [2020-10-16 10:53:09,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:09,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331569991] [2020-10-16 10:53:09,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937558296] [2020-10-16 10:53:09,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:09,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:09,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:09,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:09,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:09,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:09,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:09,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:09,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342132558] [2020-10-16 10:53:09,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:09,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:09,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:09,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:09,857 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-16 10:53:10,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:10,545 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-16 10:53:10,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:53:10,546 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:10,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:10,547 INFO L225 Difference]: With dead ends: 114 [2020-10-16 10:53:10,547 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 10:53:10,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:53:10,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 10:53:10,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-16 10:53:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:53:10,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-16 10:53:10,549 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-16 10:53:10,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:10,550 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-16 10:53:10,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:10,550 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-16 10:53:10,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:10,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:10,551 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:10,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 10:53:10,759 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:10,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:10,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-16 10:53:10,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:10,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712109014] [2020-10-16 10:53:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:10,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712109014] [2020-10-16 10:53:10,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370590337] [2020-10-16 10:53:10,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:10,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:10,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:11,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:11,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:11,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312354584] [2020-10-16 10:53:11,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:11,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:11,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:11,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:11,022 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-16 10:53:11,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:11,680 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-16 10:53:11,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:53:11,681 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:11,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:11,682 INFO L225 Difference]: With dead ends: 115 [2020-10-16 10:53:11,682 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 10:53:11,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:53:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 10:53:11,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-16 10:53:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 10:53:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-16 10:53:11,684 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-16 10:53:11,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:11,685 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-16 10:53:11,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-16 10:53:11,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:11,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:11,685 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:11,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:11,886 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:11,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:11,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-16 10:53:11,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:11,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516392583] [2020-10-16 10:53:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:12,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516392583] [2020-10-16 10:53:12,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245849183] [2020-10-16 10:53:12,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:12,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:12,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:12,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:12,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:12,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:12,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:12,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:12,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148090510] [2020-10-16 10:53:12,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:12,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:12,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:12,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:12,167 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-16 10:53:12,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:12,943 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-16 10:53:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:53:12,943 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:12,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:12,944 INFO L225 Difference]: With dead ends: 112 [2020-10-16 10:53:12,944 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 10:53:12,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:53:12,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 10:53:12,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-16 10:53:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 10:53:12,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-16 10:53:12,946 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-16 10:53:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:12,946 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-16 10:53:12,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:12,946 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-16 10:53:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:12,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:12,946 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:13,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 10:53:13,147 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:13,147 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-16 10:53:13,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:13,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225627181] [2020-10-16 10:53:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:13,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225627181] [2020-10-16 10:53:13,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305755049] [2020-10-16 10:53:13,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:13,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 10:53:13,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:13,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:13,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:13,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:13,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:13,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369941522] [2020-10-16 10:53:13,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:13,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:13,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:13,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:13,406 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-16 10:53:14,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:14,100 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-16 10:53:14,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:53:14,100 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:14,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:14,101 INFO L225 Difference]: With dead ends: 113 [2020-10-16 10:53:14,101 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 10:53:14,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:53:14,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 10:53:14,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-16 10:53:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:53:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:53:14,104 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-16 10:53:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:14,104 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:53:14,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:14,104 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:53:14,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:14,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:14,104 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:14,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-16 10:53:14,305 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:14,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:14,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-16 10:53:14,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:14,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891992863] [2020-10-16 10:53:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:14,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891992863] [2020-10-16 10:53:14,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403545184] [2020-10-16 10:53:14,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:14,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:14,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:14,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:14,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:14,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:14,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:14,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:14,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260195845] [2020-10-16 10:53:14,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:14,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:14,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:14,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:14,576 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-16 10:53:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:15,446 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-16 10:53:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:53:15,447 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:15,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:15,448 INFO L225 Difference]: With dead ends: 110 [2020-10-16 10:53:15,448 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 10:53:15,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:53:15,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 10:53:15,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-16 10:53:15,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:53:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:53:15,451 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-16 10:53:15,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:15,451 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:53:15,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:15,451 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:53:15,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:15,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:15,451 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:15,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-16 10:53:15,652 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:15,653 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-16 10:53:15,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:15,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66570054] [2020-10-16 10:53:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:15,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66570054] [2020-10-16 10:53:15,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794123827] [2020-10-16 10:53:15,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:15,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:15,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:15,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:15,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:15,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:15,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:15,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001995078] [2020-10-16 10:53:15,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:15,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:15,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:15,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:15,916 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-16 10:53:16,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:16,701 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-16 10:53:16,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:53:16,701 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:16,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:16,702 INFO L225 Difference]: With dead ends: 111 [2020-10-16 10:53:16,702 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 10:53:16,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:53:16,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 10:53:16,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-16 10:53:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 10:53:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-16 10:53:16,705 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-16 10:53:16,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:16,705 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-16 10:53:16,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:16,705 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-16 10:53:16,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:16,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:16,705 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:16,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:16,906 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:16,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:16,907 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-16 10:53:16,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:16,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418946027] [2020-10-16 10:53:16,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:17,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418946027] [2020-10-16 10:53:17,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394060749] [2020-10-16 10:53:17,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:17,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:17,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:17,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:17,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:17,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:17,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:17,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:17,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111870651] [2020-10-16 10:53:17,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:17,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:17,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:17,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:17,182 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-16 10:53:18,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:18,132 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-16 10:53:18,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:53:18,133 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:18,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:18,134 INFO L225 Difference]: With dead ends: 108 [2020-10-16 10:53:18,134 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 10:53:18,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:53:18,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 10:53:18,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-16 10:53:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:53:18,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-16 10:53:18,136 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-16 10:53:18,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:18,136 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-16 10:53:18,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:18,136 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-16 10:53:18,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:18,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:18,137 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:18,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 10:53:18,338 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:18,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:18,338 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-16 10:53:18,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:18,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810630049] [2020-10-16 10:53:18,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:18,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810630049] [2020-10-16 10:53:18,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067206055] [2020-10-16 10:53:18,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:18,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:18,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:18,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:18,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:18,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431719598] [2020-10-16 10:53:18,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:18,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:18,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:18,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:18,586 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-16 10:53:19,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:19,397 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-16 10:53:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:53:19,398 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:19,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:19,399 INFO L225 Difference]: With dead ends: 128 [2020-10-16 10:53:19,399 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 10:53:19,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:53:19,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 10:53:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-16 10:53:19,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:53:19,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-16 10:53:19,402 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-16 10:53:19,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:19,402 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-16 10:53:19,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:19,402 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-16 10:53:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:19,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:19,402 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:19,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:19,603 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:19,604 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-16 10:53:19,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:19,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731757536] [2020-10-16 10:53:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:19,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731757536] [2020-10-16 10:53:19,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522448397] [2020-10-16 10:53:19,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:19,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:19,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:19,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:19,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:19,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:19,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:19,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:19,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234274762] [2020-10-16 10:53:19,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:19,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:19,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:19,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:19,877 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-16 10:53:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:20,872 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-16 10:53:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:53:20,873 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:20,874 INFO L225 Difference]: With dead ends: 109 [2020-10-16 10:53:20,874 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:53:20,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:53:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:53:20,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-16 10:53:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 10:53:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-16 10:53:20,876 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-16 10:53:20,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:20,876 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-16 10:53:20,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:20,876 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-16 10:53:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:20,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:20,877 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:21,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:21,078 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:21,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:21,078 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-16 10:53:21,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:21,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150384041] [2020-10-16 10:53:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:21,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150384041] [2020-10-16 10:53:21,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964184590] [2020-10-16 10:53:21,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:21,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 10:53:21,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:21,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:21,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:21,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:21,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:21,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798051211] [2020-10-16 10:53:21,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:21,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:21,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:21,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:21,411 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-16 10:53:21,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:21,863 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-16 10:53:21,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:53:21,864 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:21,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:21,864 INFO L225 Difference]: With dead ends: 124 [2020-10-16 10:53:21,864 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 10:53:21,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:53:21,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 10:53:21,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-16 10:53:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:21,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:21,867 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:21,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:21,867 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:21,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:21,867 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:21,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:21,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:21,868 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:22,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:22,074 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:22,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:22,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-16 10:53:22,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:22,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258783442] [2020-10-16 10:53:22,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:22,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258783442] [2020-10-16 10:53:22,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315341971] [2020-10-16 10:53:22,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:22,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:22,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:22,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:22,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:22,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:22,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:22,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:22,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273398645] [2020-10-16 10:53:22,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:22,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:22,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:22,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:22,430 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:22,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:22,986 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-16 10:53:22,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:53:22,987 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:22,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:22,988 INFO L225 Difference]: With dead ends: 121 [2020-10-16 10:53:22,988 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 10:53:22,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:53:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 10:53:22,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-16 10:53:22,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:22,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:22,991 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:22,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:22,991 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:22,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:22,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:22,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:22,992 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:23,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:23,200 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:23,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-16 10:53:23,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:23,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902690583] [2020-10-16 10:53:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:23,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902690583] [2020-10-16 10:53:23,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923279520] [2020-10-16 10:53:23,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:23,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:23,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:23,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:23,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:23,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:23,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:23,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694800772] [2020-10-16 10:53:23,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:23,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:23,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:23,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:23,512 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:24,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:24,043 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-16 10:53:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:53:24,043 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:24,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:24,044 INFO L225 Difference]: With dead ends: 118 [2020-10-16 10:53:24,044 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 10:53:24,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:53:24,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 10:53:24,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-16 10:53:24,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:24,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:24,047 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:24,048 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:24,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:24,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:24,048 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:24,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:24,251 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:24,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:24,252 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-16 10:53:24,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:24,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093098613] [2020-10-16 10:53:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:24,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093098613] [2020-10-16 10:53:24,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225959329] [2020-10-16 10:53:24,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:24,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:24,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:24,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:24,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:24,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:24,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:24,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:24,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66836964] [2020-10-16 10:53:24,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:24,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:24,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:24,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:24,582 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:25,232 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-16 10:53:25,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:53:25,233 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:25,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:25,234 INFO L225 Difference]: With dead ends: 117 [2020-10-16 10:53:25,234 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 10:53:25,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:53:25,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 10:53:25,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-16 10:53:25,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:25,236 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:25,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:25,237 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:25,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:25,237 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:25,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:25,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:25,237 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:25,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 10:53:25,438 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:25,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:25,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-16 10:53:25,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:25,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143829634] [2020-10-16 10:53:25,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:25,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143829634] [2020-10-16 10:53:25,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934203917] [2020-10-16 10:53:25,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:25,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:25,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:25,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:25,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:25,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394388903] [2020-10-16 10:53:25,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:25,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:25,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:25,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:25,735 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:26,315 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-16 10:53:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:53:26,316 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:26,317 INFO L225 Difference]: With dead ends: 114 [2020-10-16 10:53:26,317 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 10:53:26,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:53:26,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 10:53:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-16 10:53:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:26,319 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:26,319 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:26,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:26,319 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:26,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:26,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:26,320 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:26,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 10:53:26,520 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:26,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:26,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-16 10:53:26,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:26,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390850939] [2020-10-16 10:53:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:26,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390850939] [2020-10-16 10:53:26,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146247098] [2020-10-16 10:53:26,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:26,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:26,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:26,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:26,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:26,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:26,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:26,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:26,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536927339] [2020-10-16 10:53:26,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:26,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:26,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:26,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:26,852 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:27,593 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-16 10:53:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:53:27,594 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:27,594 INFO L225 Difference]: With dead ends: 113 [2020-10-16 10:53:27,594 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 10:53:27,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:53:27,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 10:53:27,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-16 10:53:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:27,597 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:27,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:27,598 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:27,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:27,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:27,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:27,598 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:27,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 10:53:27,807 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:27,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:27,807 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-16 10:53:27,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:27,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892532284] [2020-10-16 10:53:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:28,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892532284] [2020-10-16 10:53:28,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629128044] [2020-10-16 10:53:28,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:28,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 10:53:28,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:28,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:28,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:28,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:28,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:28,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700379351] [2020-10-16 10:53:28,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:28,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:28,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:28,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:28,113 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:28,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:28,770 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-16 10:53:28,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:53:28,771 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:28,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:28,772 INFO L225 Difference]: With dead ends: 110 [2020-10-16 10:53:28,772 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 10:53:28,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:53:28,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 10:53:28,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-16 10:53:28,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:28,774 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:28,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:28,774 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:28,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:28,774 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:28,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:28,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:28,775 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:28,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 10:53:28,976 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:28,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:28,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-16 10:53:28,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:28,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229327968] [2020-10-16 10:53:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:29,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229327968] [2020-10-16 10:53:29,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015403497] [2020-10-16 10:53:29,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:29,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:29,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:29,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:29,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:29,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:29,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:29,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:29,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704279626] [2020-10-16 10:53:29,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:29,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:29,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:29,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:29,302 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:30,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:30,134 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-16 10:53:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:53:30,134 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:30,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:30,135 INFO L225 Difference]: With dead ends: 109 [2020-10-16 10:53:30,135 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 10:53:30,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:53:30,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 10:53:30,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-16 10:53:30,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:30,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:30,138 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:30,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:30,138 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:30,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:30,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:30,139 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:30,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:30,344 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:30,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-16 10:53:30,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:30,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283641799] [2020-10-16 10:53:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:30,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283641799] [2020-10-16 10:53:30,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651912993] [2020-10-16 10:53:30,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:30,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:30,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:30,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:30,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:30,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:30,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:30,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726029455] [2020-10-16 10:53:30,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:30,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:30,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:30,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:30,632 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:31,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:31,366 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-16 10:53:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:53:31,367 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:31,367 INFO L225 Difference]: With dead ends: 106 [2020-10-16 10:53:31,367 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 10:53:31,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:53:31,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 10:53:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-16 10:53:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:31,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:31,369 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:31,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:31,370 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:31,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:31,370 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:31,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:31,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:31,370 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:31,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-16 10:53:31,571 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:31,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:31,571 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-16 10:53:31,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:31,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541772160] [2020-10-16 10:53:31,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:31,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541772160] [2020-10-16 10:53:31,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888079453] [2020-10-16 10:53:31,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:31,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:31,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:31,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:31,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:31,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:31,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:31,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:31,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130455216] [2020-10-16 10:53:31,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:31,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:31,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:31,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:31,885 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:32,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:32,806 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-16 10:53:32,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:53:32,807 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:32,808 INFO L225 Difference]: With dead ends: 105 [2020-10-16 10:53:32,808 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 10:53:32,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:53:32,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 10:53:32,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-16 10:53:32,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:32,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:32,811 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:32,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:32,811 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:32,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:32,811 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:32,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:32,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:32,812 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:33,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:33,013 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:33,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:33,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-16 10:53:33,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:33,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18655067] [2020-10-16 10:53:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:33,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18655067] [2020-10-16 10:53:33,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597616609] [2020-10-16 10:53:33,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:33,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:33,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:33,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:33,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:33,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995142420] [2020-10-16 10:53:33,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:33,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:33,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:33,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:33,290 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:34,071 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-16 10:53:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:53:34,072 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:34,072 INFO L225 Difference]: With dead ends: 102 [2020-10-16 10:53:34,073 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 10:53:34,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:53:34,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 10:53:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-16 10:53:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:34,075 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:34,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:34,075 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:34,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:34,075 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:34,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:34,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:34,075 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:34,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:34,276 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:34,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:34,277 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-16 10:53:34,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:34,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532002560] [2020-10-16 10:53:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:34,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532002560] [2020-10-16 10:53:34,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013346472] [2020-10-16 10:53:34,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:34,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:34,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:34,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:34,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:34,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:34,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:34,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:34,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488224534] [2020-10-16 10:53:34,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:34,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:34,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:34,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:34,579 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:35,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:35,603 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-16 10:53:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:53:35,603 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:35,604 INFO L225 Difference]: With dead ends: 101 [2020-10-16 10:53:35,604 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 10:53:35,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:53:35,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 10:53:35,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-16 10:53:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:35,606 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:35,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:35,606 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:35,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:35,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:35,607 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:35,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-16 10:53:35,814 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:35,814 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-16 10:53:35,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:35,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41371155] [2020-10-16 10:53:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:36,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41371155] [2020-10-16 10:53:36,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009604197] [2020-10-16 10:53:36,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:36,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 10:53:36,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:36,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:36,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:36,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:36,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:36,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987611861] [2020-10-16 10:53:36,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:36,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:36,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:36,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:36,090 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:36,943 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-16 10:53:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:53:36,944 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:36,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:36,945 INFO L225 Difference]: With dead ends: 98 [2020-10-16 10:53:36,945 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 10:53:36,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:53:36,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 10:53:36,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-16 10:53:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:36,947 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:36,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:36,948 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:36,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:36,948 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:36,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:36,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:36,948 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:37,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:37,149 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:37,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:37,149 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-16 10:53:37,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:37,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147329232] [2020-10-16 10:53:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:37,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147329232] [2020-10-16 10:53:37,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919116470] [2020-10-16 10:53:37,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:37,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:37,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:37,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:37,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:37,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:37,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:37,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:37,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111331679] [2020-10-16 10:53:37,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:37,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:37,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:37,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:37,456 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:38,570 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-16 10:53:38,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:53:38,571 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:38,572 INFO L225 Difference]: With dead ends: 97 [2020-10-16 10:53:38,572 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 10:53:38,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 10:53:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 10:53:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-16 10:53:38,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:38,574 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:38,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:38,575 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:38,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:38,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:38,575 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:38,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-16 10:53:38,778 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:38,778 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-16 10:53:38,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:38,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971560024] [2020-10-16 10:53:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:38,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971560024] [2020-10-16 10:53:38,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902522021] [2020-10-16 10:53:38,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:39,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:39,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:39,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:39,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:39,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:39,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:39,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947125188] [2020-10-16 10:53:39,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:39,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:39,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:39,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:39,050 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:39,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:39,959 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-16 10:53:39,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:53:39,960 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:39,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:39,961 INFO L225 Difference]: With dead ends: 113 [2020-10-16 10:53:39,961 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 10:53:39,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:53:39,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 10:53:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-16 10:53:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 10:53:39,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-16 10:53:39,964 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-16 10:53:39,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:39,964 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-16 10:53:39,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:39,964 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-16 10:53:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:39,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:39,964 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:40,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 10:53:40,165 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:40,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:40,166 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-16 10:53:40,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:40,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858569039] [2020-10-16 10:53:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:40,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858569039] [2020-10-16 10:53:40,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275462594] [2020-10-16 10:53:40,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:40,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:40,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:40,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:40,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:40,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:40,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:40,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:40,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992188966] [2020-10-16 10:53:40,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:40,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:40,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:40,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:40,466 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-16 10:53:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:41,663 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-16 10:53:41,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 10:53:41,664 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:41,664 INFO L225 Difference]: With dead ends: 94 [2020-10-16 10:53:41,665 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 10:53:41,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:53:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 10:53:41,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-16 10:53:41,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 10:53:41,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-16 10:53:41,667 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-16 10:53:41,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:41,667 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-16 10:53:41,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:41,667 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-16 10:53:41,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:41,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:41,668 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:41,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-16 10:53:41,869 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:41,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:41,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-16 10:53:41,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:41,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170317176] [2020-10-16 10:53:41,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:42,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170317176] [2020-10-16 10:53:42,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528831728] [2020-10-16 10:53:42,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:42,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:42,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:42,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:53:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:42,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:42,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:42,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810292270] [2020-10-16 10:53:42,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:42,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:42,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:42,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:42,179 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-16 10:53:43,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:43,266 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-16 10:53:43,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:53:43,267 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:43,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:43,267 INFO L225 Difference]: With dead ends: 108 [2020-10-16 10:53:43,268 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 10:53:43,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:53:43,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 10:53:43,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-16 10:53:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:53:43,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-16 10:53:43,270 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-16 10:53:43,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:43,270 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-16 10:53:43,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:43,270 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-16 10:53:43,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:43,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:43,271 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:43,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 10:53:43,472 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:43,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:43,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-16 10:53:43,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:43,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280774001] [2020-10-16 10:53:43,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:43,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280774001] [2020-10-16 10:53:43,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840880762] [2020-10-16 10:53:43,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:43,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:43,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:43,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:43,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:43,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:53:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:43,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:43,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:43,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840607225] [2020-10-16 10:53:43,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:43,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:43,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:43,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:43,797 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-16 10:53:44,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:44,964 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-16 10:53:44,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:53:44,965 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:44,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:44,965 INFO L225 Difference]: With dead ends: 90 [2020-10-16 10:53:44,966 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 10:53:44,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 10:53:44,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 10:53:44,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-16 10:53:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:53:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-16 10:53:44,968 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-16 10:53:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:44,968 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-16 10:53:44,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:44,968 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-16 10:53:44,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:44,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:44,969 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:45,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:45,170 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:45,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:45,170 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-16 10:53:45,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:45,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461788188] [2020-10-16 10:53:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:45,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461788188] [2020-10-16 10:53:45,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413012654] [2020-10-16 10:53:45,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:45,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:53:45,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:45,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:45,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:45,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:45,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:45,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417616786] [2020-10-16 10:53:45,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:45,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:45,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:45,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:45,538 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-16 10:53:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:46,033 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-16 10:53:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:53:46,034 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:46,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:46,034 INFO L225 Difference]: With dead ends: 96 [2020-10-16 10:53:46,035 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 10:53:46,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:53:46,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 10:53:46,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-16 10:53:46,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:53:46,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-16 10:53:46,037 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-16 10:53:46,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:46,037 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-16 10:53:46,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:46,038 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-16 10:53:46,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:46,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:46,038 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:46,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:46,241 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:46,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:46,242 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-16 10:53:46,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:46,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134128196] [2020-10-16 10:53:46,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:46,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134128196] [2020-10-16 10:53:46,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804384943] [2020-10-16 10:53:46,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:46,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:46,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:46,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:46,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:46,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:46,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:46,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:46,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350407698] [2020-10-16 10:53:46,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:46,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:46,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:46,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:46,639 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-16 10:53:47,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:47,162 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-16 10:53:47,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:53:47,163 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:47,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:47,164 INFO L225 Difference]: With dead ends: 114 [2020-10-16 10:53:47,164 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 10:53:47,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:53:47,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 10:53:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-16 10:53:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:53:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-16 10:53:47,166 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-16 10:53:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:47,167 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-16 10:53:47,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-16 10:53:47,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:47,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:47,167 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:47,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:47,368 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:47,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:47,369 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-16 10:53:47,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:47,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504990907] [2020-10-16 10:53:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:47,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504990907] [2020-10-16 10:53:47,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437848076] [2020-10-16 10:53:47,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:47,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:53:47,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:47,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:47,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:47,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:47,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:47,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513422954] [2020-10-16 10:53:47,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:47,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:47,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:47,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:47,724 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-16 10:53:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:48,307 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-16 10:53:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:53:48,308 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:48,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:48,308 INFO L225 Difference]: With dead ends: 115 [2020-10-16 10:53:48,308 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 10:53:48,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:53:48,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 10:53:48,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-16 10:53:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 10:53:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-16 10:53:48,311 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-16 10:53:48,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:48,311 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-16 10:53:48,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:48,312 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-16 10:53:48,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:48,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:48,312 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:48,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:48,513 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:48,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:48,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-16 10:53:48,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:48,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513379920] [2020-10-16 10:53:48,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:48,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513379920] [2020-10-16 10:53:48,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392257420] [2020-10-16 10:53:48,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:48,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:53:48,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:48,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:48,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:48,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:48,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:48,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068546352] [2020-10-16 10:53:48,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:48,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:48,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:48,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:48,913 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-16 10:53:49,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:49,529 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-16 10:53:49,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:53:49,529 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:49,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:49,530 INFO L225 Difference]: With dead ends: 129 [2020-10-16 10:53:49,530 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 10:53:49,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:53:49,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 10:53:49,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-16 10:53:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:53:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-16 10:53:49,533 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-16 10:53:49,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:49,534 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-16 10:53:49,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:49,534 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-16 10:53:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:49,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:49,534 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:49,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:49,743 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:49,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:49,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-16 10:53:49,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:49,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655124165] [2020-10-16 10:53:49,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:50,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655124165] [2020-10-16 10:53:50,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635312151] [2020-10-16 10:53:50,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:50,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:50,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:50,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:50,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:50,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548761769] [2020-10-16 10:53:50,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:50,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:50,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:50,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:50,084 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-16 10:53:50,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:50,731 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-16 10:53:50,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:53:50,731 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:50,732 INFO L225 Difference]: With dead ends: 129 [2020-10-16 10:53:50,732 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 10:53:50,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:53:50,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 10:53:50,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-16 10:53:50,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 10:53:50,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-16 10:53:50,734 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-16 10:53:50,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:50,735 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-16 10:53:50,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:50,735 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-16 10:53:50,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:50,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:50,735 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:50,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:50,936 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:50,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:50,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-16 10:53:50,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:50,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314646999] [2020-10-16 10:53:50,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:51,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314646999] [2020-10-16 10:53:51,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731380928] [2020-10-16 10:53:51,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:51,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:51,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:51,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:51,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:51,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:51,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:51,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:51,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342924470] [2020-10-16 10:53:51,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:51,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:51,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:51,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:51,310 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-16 10:53:52,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:52,056 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-16 10:53:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:53:52,057 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:52,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:52,058 INFO L225 Difference]: With dead ends: 126 [2020-10-16 10:53:52,058 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 10:53:52,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:53:52,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 10:53:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-16 10:53:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 10:53:52,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-16 10:53:52,061 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-16 10:53:52,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:52,061 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-16 10:53:52,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:52,062 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-16 10:53:52,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:52,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:52,062 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:52,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:52,263 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:52,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:52,263 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-16 10:53:52,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:52,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290011967] [2020-10-16 10:53:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:52,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290011967] [2020-10-16 10:53:52,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413847052] [2020-10-16 10:53:52,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:52,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:53:52,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:52,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:52,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:52,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:52,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:52,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071712229] [2020-10-16 10:53:52,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:52,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:52,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:52,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:52,603 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-16 10:53:53,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:53,308 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-16 10:53:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:53:53,308 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:53,309 INFO L225 Difference]: With dead ends: 127 [2020-10-16 10:53:53,309 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 10:53:53,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:53:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 10:53:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-16 10:53:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:53:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-16 10:53:53,311 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-16 10:53:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:53,312 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-16 10:53:53,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-16 10:53:53,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:53,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:53,312 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:53,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-16 10:53:53,513 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:53,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:53,514 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-16 10:53:53,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:53,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360676546] [2020-10-16 10:53:53,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:53,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360676546] [2020-10-16 10:53:53,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929877107] [2020-10-16 10:53:53,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:53,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:53,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:53,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:53,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:53,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:53,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:53,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:53,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694400053] [2020-10-16 10:53:53,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:53,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:53,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:53,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:53,876 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-16 10:53:54,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:54,699 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-16 10:53:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:53:54,700 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:54,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:54,700 INFO L225 Difference]: With dead ends: 124 [2020-10-16 10:53:54,700 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 10:53:54,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:53:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 10:53:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-16 10:53:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:53:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-16 10:53:54,702 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-16 10:53:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:54,703 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-16 10:53:54,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-16 10:53:54,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:54,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:54,704 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:54,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-16 10:53:54,904 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:54,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:54,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-16 10:53:54,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:54,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106529064] [2020-10-16 10:53:54,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:55,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106529064] [2020-10-16 10:53:55,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272286450] [2020-10-16 10:53:55,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:55,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:53:55,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:55,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:55,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:55,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:55,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:55,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594284351] [2020-10-16 10:53:55,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:55,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:55,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:55,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:55,248 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-16 10:53:56,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:56,016 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-16 10:53:56,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:53:56,017 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:56,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:56,017 INFO L225 Difference]: With dead ends: 125 [2020-10-16 10:53:56,018 INFO L226 Difference]: Without dead ends: 119 [2020-10-16 10:53:56,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:53:56,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-16 10:53:56,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-16 10:53:56,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 10:53:56,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-16 10:53:56,020 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-16 10:53:56,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:56,021 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-16 10:53:56,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:56,021 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-16 10:53:56,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:56,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:56,021 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:56,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-16 10:53:56,222 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:56,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:56,223 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-16 10:53:56,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:56,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164394785] [2020-10-16 10:53:56,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:56,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164394785] [2020-10-16 10:53:56,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235447778] [2020-10-16 10:53:56,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:56,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:53:56,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:56,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:56,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:56,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:56,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:56,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:56,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198506411] [2020-10-16 10:53:56,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:56,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:56,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:56,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:56,579 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-16 10:53:57,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:57,498 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-16 10:53:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:53:57,499 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:57,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:57,500 INFO L225 Difference]: With dead ends: 122 [2020-10-16 10:53:57,500 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 10:53:57,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:53:57,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 10:53:57,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-16 10:53:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:53:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-16 10:53:57,502 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-16 10:53:57,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:57,502 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-16 10:53:57,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:57,502 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-16 10:53:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:57,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:57,503 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:57,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-16 10:53:57,704 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:57,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-16 10:53:57,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:57,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120914615] [2020-10-16 10:53:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:57,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120914615] [2020-10-16 10:53:57,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814526672] [2020-10-16 10:53:57,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:57,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:57,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:58,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:58,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:58,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873569194] [2020-10-16 10:53:58,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:58,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:58,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:58,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:58,012 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-16 10:53:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:58,853 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-16 10:53:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:53:58,853 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:58,854 INFO L225 Difference]: With dead ends: 123 [2020-10-16 10:53:58,854 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:53:58,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:53:58,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:53:58,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-16 10:53:58,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 10:53:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-16 10:53:58,857 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-16 10:53:58,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:58,857 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-16 10:53:58,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:58,857 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-16 10:53:58,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:58,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:58,857 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:59,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:59,058 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:59,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:59,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-16 10:53:59,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:59,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263556938] [2020-10-16 10:53:59,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:59,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263556938] [2020-10-16 10:53:59,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294019076] [2020-10-16 10:53:59,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:59,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:59,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:59,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:59,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:59,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:59,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:59,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:59,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547449404] [2020-10-16 10:53:59,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:59,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:59,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:59,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:59,409 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-16 10:54:00,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:00,411 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-16 10:54:00,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:54:00,412 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:54:00,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:00,412 INFO L225 Difference]: With dead ends: 120 [2020-10-16 10:54:00,413 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 10:54:00,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:54:00,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 10:54:00,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-16 10:54:00,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 10:54:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-16 10:54:00,414 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-16 10:54:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:00,415 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-16 10:54:00,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-16 10:54:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:54:00,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:00,415 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:00,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:00,616 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:00,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:00,616 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-16 10:54:00,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:00,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510419199] [2020-10-16 10:54:00,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:00,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510419199] [2020-10-16 10:54:00,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606690890] [2020-10-16 10:54:00,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:00,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:54:00,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:00,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:54:00,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:00,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:00,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:54:00,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058065887] [2020-10-16 10:54:00,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:54:00,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:00,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:54:00,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:54:00,941 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-16 10:54:01,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:01,856 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-16 10:54:01,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:54:01,857 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:54:01,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:01,857 INFO L225 Difference]: With dead ends: 121 [2020-10-16 10:54:01,857 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 10:54:01,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 10:54:01,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 10:54:01,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-16 10:54:01,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:54:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:54:01,859 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-16 10:54:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:01,859 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:54:01,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:54:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:54:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:54:01,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:01,860 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:02,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-16 10:54:02,061 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:02,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:02,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-16 10:54:02,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:02,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813019867] [2020-10-16 10:54:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:02,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813019867] [2020-10-16 10:54:02,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241106736] [2020-10-16 10:54:02,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:02,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:02,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:02,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:54:02,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:02,378 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:02,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:02,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:54:02,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680351280] [2020-10-16 10:54:02,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:02,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:02,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:02,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:02,397 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-16 10:54:03,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:03,542 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-16 10:54:03,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:54:03,543 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:54:03,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:03,543 INFO L225 Difference]: With dead ends: 118 [2020-10-16 10:54:03,543 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 10:54:03,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 10:54:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 10:54:03,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-16 10:54:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:54:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:54:03,545 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-16 10:54:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:03,545 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:54:03,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:03,545 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:54:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:54:03,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:03,546 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:03,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:03,747 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:03,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:03,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-16 10:54:03,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:03,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871176776] [2020-10-16 10:54:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:03,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871176776] [2020-10-16 10:54:03,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355974834] [2020-10-16 10:54:03,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:04,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:54:04,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:04,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:54:04,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:04,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:04,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:54:04,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235767663] [2020-10-16 10:54:04,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:54:04,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:04,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:54:04,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:54:04,061 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-16 10:54:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:05,053 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-16 10:54:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 10:54:05,053 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:54:05,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:05,054 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:54:05,054 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:54:05,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:54:05,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:54:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-16 10:54:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 10:54:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-16 10:54:05,057 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-16 10:54:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:05,058 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-16 10:54:05,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:54:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-16 10:54:05,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:54:05,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:05,058 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:05,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:05,265 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:05,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:05,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-16 10:54:05,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:05,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806830909] [2020-10-16 10:54:05,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:05,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806830909] [2020-10-16 10:54:05,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244351084] [2020-10-16 10:54:05,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:05,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:54:05,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:05,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:54:05,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:05,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:05,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:05,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:54:05,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165890865] [2020-10-16 10:54:05,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:05,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:05,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:05,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:05,609 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-16 10:54:06,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:06,822 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-16 10:54:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 10:54:06,823 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:54:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:06,824 INFO L225 Difference]: With dead ends: 116 [2020-10-16 10:54:06,824 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 10:54:06,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 10:54:06,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 10:54:06,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-16 10:54:06,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:54:06,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-16 10:54:06,826 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-16 10:54:06,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:06,827 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-16 10:54:06,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:06,827 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-16 10:54:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:54:06,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:06,827 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:07,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:07,028 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:07,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:07,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-16 10:54:07,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:07,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19757063] [2020-10-16 10:54:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:07,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19757063] [2020-10-16 10:54:07,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170263347] [2020-10-16 10:54:07,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:07,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:54:07,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:07,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:07,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:54:07,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742858086] [2020-10-16 10:54:07,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:54:07,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:07,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:54:07,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:54:07,336 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-16 10:54:08,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:08,370 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-16 10:54:08,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:54:08,371 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:54:08,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:08,372 INFO L225 Difference]: With dead ends: 136 [2020-10-16 10:54:08,372 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 10:54:08,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 10:54:08,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 10:54:08,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-16 10:54:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 10:54:08,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-16 10:54:08,375 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-16 10:54:08,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:08,376 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-16 10:54:08,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:54:08,376 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-16 10:54:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:54:08,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:08,376 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:08,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:08,585 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:08,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:08,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-16 10:54:08,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:08,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861266302] [2020-10-16 10:54:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:08,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861266302] [2020-10-16 10:54:08,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168209759] [2020-10-16 10:54:08,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:08,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:08,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:08,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:54:08,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:08,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:08,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:08,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:54:08,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577515972] [2020-10-16 10:54:08,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:08,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:08,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:08,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:08,913 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-16 10:54:10,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:10,162 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-16 10:54:10,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 10:54:10,163 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:54:10,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:10,164 INFO L225 Difference]: With dead ends: 117 [2020-10-16 10:54:10,164 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 10:54:10,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 10:54:10,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 10:54:10,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-16 10:54:10,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 10:54:10,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-16 10:54:10,166 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-16 10:54:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:10,166 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-16 10:54:10,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-16 10:54:10,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:10,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:10,167 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:10,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:10,368 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:10,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:10,368 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-16 10:54:10,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:10,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157596488] [2020-10-16 10:54:10,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:10,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157596488] [2020-10-16 10:54:10,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846263953] [2020-10-16 10:54:10,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:10,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:54:10,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:10,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:10,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:10,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:10,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:10,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117819804] [2020-10-16 10:54:10,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:10,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:10,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:10,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:10,778 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-16 10:54:11,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:11,363 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-16 10:54:11,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:54:11,364 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:11,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:11,365 INFO L225 Difference]: With dead ends: 134 [2020-10-16 10:54:11,365 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 10:54:11,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:54:11,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 10:54:11,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-16 10:54:11,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:11,367 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:11,367 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:11,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:11,368 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:11,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:11,368 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:11,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-16 10:54:11,569 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:11,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:11,569 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-16 10:54:11,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:11,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620592103] [2020-10-16 10:54:11,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:11,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620592103] [2020-10-16 10:54:11,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386346401] [2020-10-16 10:54:11,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:11,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:11,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:11,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:11,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:11,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:12,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:12,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:12,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630350108] [2020-10-16 10:54:12,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:12,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:12,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:12,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:12,005 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:12,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:12,684 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-16 10:54:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:54:12,685 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:12,686 INFO L225 Difference]: With dead ends: 131 [2020-10-16 10:54:12,686 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 10:54:12,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:54:12,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 10:54:12,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-16 10:54:12,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:12,689 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:12,689 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:12,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:12,689 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:12,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:12,690 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:12,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-16 10:54:12,890 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:12,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:12,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-16 10:54:12,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:12,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073901702] [2020-10-16 10:54:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:13,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073901702] [2020-10-16 10:54:13,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082517946] [2020-10-16 10:54:13,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:13,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:54:13,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:13,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:13,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:13,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:13,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:13,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415076675] [2020-10-16 10:54:13,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:13,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:13,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:13,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:13,298 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:13,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:13,952 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-16 10:54:13,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:54:13,953 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:13,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:13,954 INFO L225 Difference]: With dead ends: 128 [2020-10-16 10:54:13,954 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 10:54:13,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:54:13,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 10:54:13,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-16 10:54:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:13,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:13,957 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:13,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:13,957 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:13,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:13,957 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:13,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:13,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:13,958 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:14,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:14,158 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:14,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:14,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-16 10:54:14,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:14,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059522671] [2020-10-16 10:54:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:14,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059522671] [2020-10-16 10:54:14,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771204833] [2020-10-16 10:54:14,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:14,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:54:14,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:14,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:14,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:14,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:14,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:14,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:14,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671243289] [2020-10-16 10:54:14,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:14,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:14,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:14,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:14,597 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:15,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:15,379 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-16 10:54:15,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:54:15,380 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:15,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:15,381 INFO L225 Difference]: With dead ends: 127 [2020-10-16 10:54:15,381 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 10:54:15,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:54:15,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 10:54:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-16 10:54:15,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:15,383 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:15,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:15,383 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:15,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:15,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:15,384 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:15,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-16 10:54:15,584 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:15,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-16 10:54:15,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:15,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518998584] [2020-10-16 10:54:15,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:15,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518998584] [2020-10-16 10:54:15,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199937136] [2020-10-16 10:54:15,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:15,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:15,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:15,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:15,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:15,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541746499] [2020-10-16 10:54:15,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:15,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:15,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:15,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:15,966 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:16,696 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-16 10:54:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:54:16,697 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:16,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:16,697 INFO L225 Difference]: With dead ends: 124 [2020-10-16 10:54:16,698 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 10:54:16,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:54:16,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 10:54:16,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-16 10:54:16,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:16,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:16,700 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:16,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:16,700 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:16,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:16,701 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:16,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:16,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:16,701 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:16,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:16,902 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:16,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:16,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-16 10:54:16,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:16,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695599987] [2020-10-16 10:54:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:17,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695599987] [2020-10-16 10:54:17,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173316260] [2020-10-16 10:54:17,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:17,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:17,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:17,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:17,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:17,284 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:17,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:17,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:17,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562677109] [2020-10-16 10:54:17,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:17,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:17,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:17,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:17,299 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:18,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:18,165 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-16 10:54:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:54:18,166 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:18,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:18,167 INFO L225 Difference]: With dead ends: 123 [2020-10-16 10:54:18,167 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:54:18,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:54:18,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:54:18,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-16 10:54:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:18,169 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:18,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:18,169 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:18,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:18,170 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:18,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:18,170 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:18,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:18,371 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:18,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:18,371 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-16 10:54:18,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:18,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605021394] [2020-10-16 10:54:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:18,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605021394] [2020-10-16 10:54:18,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412813693] [2020-10-16 10:54:18,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:18,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:54:18,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:18,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:18,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:18,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:18,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:18,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868303496] [2020-10-16 10:54:18,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:18,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:18,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:18,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:18,726 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:19,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:19,522 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-16 10:54:19,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:54:19,523 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:19,523 INFO L225 Difference]: With dead ends: 120 [2020-10-16 10:54:19,523 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 10:54:19,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:54:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 10:54:19,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-16 10:54:19,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:19,526 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:19,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:19,526 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:19,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:19,526 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:19,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:19,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:19,526 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:19,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:19,727 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:19,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:19,728 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-16 10:54:19,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:19,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415663894] [2020-10-16 10:54:19,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:20,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415663894] [2020-10-16 10:54:20,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81313541] [2020-10-16 10:54:20,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:20,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:20,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:20,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:20,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:20,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:20,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:20,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:20,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513591215] [2020-10-16 10:54:20,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:20,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:20,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:20,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:20,121 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:21,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:21,103 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-16 10:54:21,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:54:21,104 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:21,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:21,105 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:54:21,105 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:54:21,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:54:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:54:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-16 10:54:21,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:21,108 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:21,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:21,108 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:21,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:21,108 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:21,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:21,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:21,109 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:21,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:21,312 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:21,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:21,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-16 10:54:21,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:21,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120294842] [2020-10-16 10:54:21,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:21,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120294842] [2020-10-16 10:54:21,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055254844] [2020-10-16 10:54:21,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:21,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:54:21,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:21,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:21,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:21,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:21,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:21,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074616641] [2020-10-16 10:54:21,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:21,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:21,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:21,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:21,655 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:22,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:22,507 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-16 10:54:22,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:54:22,508 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:22,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:22,508 INFO L225 Difference]: With dead ends: 116 [2020-10-16 10:54:22,508 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 10:54:22,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:54:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 10:54:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-16 10:54:22,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:22,511 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:22,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:22,511 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:22,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:22,511 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:22,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:22,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:22,511 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:22,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-16 10:54:22,712 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:22,713 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-16 10:54:22,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:22,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280019479] [2020-10-16 10:54:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:22,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280019479] [2020-10-16 10:54:22,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141608608] [2020-10-16 10:54:22,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:23,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:54:23,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:23,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:23,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:23,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:23,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:23,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:23,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042464371] [2020-10-16 10:54:23,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:23,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:23,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:23,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:23,096 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:24,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:24,176 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-16 10:54:24,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:54:24,177 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:24,178 INFO L225 Difference]: With dead ends: 115 [2020-10-16 10:54:24,178 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 10:54:24,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 10:54:24,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 10:54:24,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-16 10:54:24,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:24,181 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:24,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:24,181 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:24,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:24,182 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:24,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:24,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:24,182 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:24,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:24,389 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:24,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-16 10:54:24,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:24,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681780237] [2020-10-16 10:54:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:24,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681780237] [2020-10-16 10:54:24,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771917674] [2020-10-16 10:54:24,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:24,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:24,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:24,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:24,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:24,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160322865] [2020-10-16 10:54:24,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:24,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:24,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:24,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:24,736 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:25,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:25,701 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-16 10:54:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:54:25,703 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:25,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:25,704 INFO L225 Difference]: With dead ends: 112 [2020-10-16 10:54:25,704 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 10:54:25,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:54:25,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 10:54:25,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-16 10:54:25,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:25,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:25,708 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:25,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:25,708 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:25,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:25,708 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:25,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:25,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:25,709 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:25,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-16 10:54:25,912 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:25,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:25,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-16 10:54:25,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:25,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805027654] [2020-10-16 10:54:25,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:26,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805027654] [2020-10-16 10:54:26,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795071744] [2020-10-16 10:54:26,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:26,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:26,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:26,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:26,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:26,265 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:26,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:26,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:26,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880036231] [2020-10-16 10:54:26,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:26,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:26,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:26,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:26,289 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:27,494 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-16 10:54:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:54:27,495 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:27,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:27,496 INFO L225 Difference]: With dead ends: 111 [2020-10-16 10:54:27,496 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 10:54:27,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:54:27,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 10:54:27,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-16 10:54:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:27,498 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:27,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:27,499 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:27,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:27,499 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:27,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:27,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:27,499 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:27,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-16 10:54:27,700 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:27,700 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-16 10:54:27,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:27,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010240194] [2020-10-16 10:54:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:27,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010240194] [2020-10-16 10:54:27,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352104305] [2020-10-16 10:54:27,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:28,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:54:28,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:28,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:28,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:28,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:28,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:28,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426030284] [2020-10-16 10:54:28,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:28,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:28,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:28,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:28,048 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:29,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:29,069 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-16 10:54:29,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:54:29,070 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:29,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:29,071 INFO L225 Difference]: With dead ends: 108 [2020-10-16 10:54:29,071 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 10:54:29,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 10:54:29,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 10:54:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-16 10:54:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:29,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:29,074 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:29,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:29,074 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:29,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:29,074 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:29,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:29,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:29,074 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:29,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:29,277 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:29,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:29,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-16 10:54:29,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:29,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815030053] [2020-10-16 10:54:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:29,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815030053] [2020-10-16 10:54:29,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168611782] [2020-10-16 10:54:29,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:29,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:29,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:29,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:29,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:29,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:29,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:29,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:29,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957768392] [2020-10-16 10:54:29,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:29,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:29,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:29,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:29,651 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:30,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:30,959 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-16 10:54:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 10:54:30,960 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:30,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:30,961 INFO L225 Difference]: With dead ends: 107 [2020-10-16 10:54:30,961 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:54:30,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 10:54:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:54:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-16 10:54:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:30,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:30,964 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:30,965 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:30,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:30,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:30,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:30,965 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:31,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:31,170 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:31,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:31,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-16 10:54:31,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:31,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480889996] [2020-10-16 10:54:31,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:31,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480889996] [2020-10-16 10:54:31,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115669978] [2020-10-16 10:54:31,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:31,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:54:31,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:31,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:31,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:31,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:31,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:31,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777310885] [2020-10-16 10:54:31,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:31,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:31,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:31,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:31,516 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:32,616 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-16 10:54:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 10:54:32,617 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:32,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:32,618 INFO L225 Difference]: With dead ends: 104 [2020-10-16 10:54:32,618 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:54:32,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 10:54:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:54:32,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-16 10:54:32,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:32,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:32,621 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:32,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:32,621 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:32,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:32,621 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:32,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:32,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:32,621 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:32,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:32,822 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:32,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:32,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-16 10:54:32,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:32,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567258987] [2020-10-16 10:54:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:33,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567258987] [2020-10-16 10:54:33,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820540380] [2020-10-16 10:54:33,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:33,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:54:33,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:33,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:33,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:33,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:33,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:33,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:33,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207831823] [2020-10-16 10:54:33,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:33,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:33,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:33,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:33,201 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:34,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:34,631 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-16 10:54:34,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 10:54:34,632 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:34,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:34,632 INFO L225 Difference]: With dead ends: 103 [2020-10-16 10:54:34,632 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 10:54:34,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 10:54:34,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 10:54:34,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-16 10:54:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:34,636 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:34,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:34,636 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:34,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:34,636 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:34,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:34,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:34,636 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:34,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-16 10:54:34,848 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:34,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-16 10:54:34,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:34,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218236369] [2020-10-16 10:54:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:35,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218236369] [2020-10-16 10:54:35,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968158364] [2020-10-16 10:54:35,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:35,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:35,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:35,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:35,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:35,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100467124] [2020-10-16 10:54:35,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:35,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:35,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:35,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:35,190 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:36,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:36,343 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-16 10:54:36,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:54:36,344 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:36,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:36,344 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:54:36,344 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:54:36,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 10:54:36,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:54:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-16 10:54:36,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-16 10:54:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-16 10:54:36,347 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-16 10:54:36,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:36,348 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-16 10:54:36,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:36,348 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-16 10:54:36,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:36,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:36,349 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:36,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:36,549 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:36,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:36,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-16 10:54:36,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:36,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974719287] [2020-10-16 10:54:36,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:36,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974719287] [2020-10-16 10:54:36,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570337821] [2020-10-16 10:54:36,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:36,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:36,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:36,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:36,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:36,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:36,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:36,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:36,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835461847] [2020-10-16 10:54:36,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:36,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:36,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:36,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:36,931 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-16 10:54:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:38,385 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-16 10:54:38,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 10:54:38,386 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:38,386 INFO L225 Difference]: With dead ends: 100 [2020-10-16 10:54:38,386 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 10:54:38,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 10:54:38,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 10:54:38,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-16 10:54:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 10:54:38,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-16 10:54:38,389 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-16 10:54:38,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:38,389 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-16 10:54:38,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:38,389 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-16 10:54:38,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:38,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:38,390 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:38,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:38,597 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:38,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:38,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-16 10:54:38,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:38,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471025821] [2020-10-16 10:54:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:38,864 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:38,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471025821] [2020-10-16 10:54:38,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104373423] [2020-10-16 10:54:38,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:38,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:54:38,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:38,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:38,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:38,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:54:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:38,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:38,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:38,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701770744] [2020-10-16 10:54:38,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:38,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:38,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:38,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:38,973 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-16 10:54:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:40,375 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-16 10:54:40,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:54:40,376 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:40,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:40,377 INFO L225 Difference]: With dead ends: 116 [2020-10-16 10:54:40,377 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 10:54:40,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 10:54:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 10:54:40,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-16 10:54:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 10:54:40,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-16 10:54:40,379 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-16 10:54:40,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:40,379 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-16 10:54:40,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:40,380 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-16 10:54:40,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:40,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:40,380 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:40,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:40,581 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:40,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:40,581 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-16 10:54:40,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:40,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635437365] [2020-10-16 10:54:40,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:40,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635437365] [2020-10-16 10:54:40,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575571284] [2020-10-16 10:54:40,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:40,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:40,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:40,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:40,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:40,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:54:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:40,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:40,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:40,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615261452] [2020-10-16 10:54:40,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:40,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:40,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:40,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:40,980 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-16 10:54:42,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:42,452 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-16 10:54:42,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:54:42,453 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:42,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:42,453 INFO L225 Difference]: With dead ends: 96 [2020-10-16 10:54:42,453 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 10:54:42,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 10:54:42,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 10:54:42,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-16 10:54:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:54:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-16 10:54:42,455 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-16 10:54:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:42,456 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-16 10:54:42,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:42,456 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-16 10:54:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:42,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:42,456 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:42,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:42,657 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:42,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:42,658 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-16 10:54:42,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:42,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661439872] [2020-10-16 10:54:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:43,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661439872] [2020-10-16 10:54:43,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556353671] [2020-10-16 10:54:43,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:43,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:54:43,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:43,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:43,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:43,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:43,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:43,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438119702] [2020-10-16 10:54:43,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:43,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:43,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:43,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:43,108 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-16 10:54:43,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:43,711 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-16 10:54:43,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:54:43,712 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:43,713 INFO L225 Difference]: With dead ends: 102 [2020-10-16 10:54:43,713 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 10:54:43,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:54:43,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 10:54:43,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-16 10:54:43,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:54:43,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-16 10:54:43,716 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-16 10:54:43,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:43,716 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-16 10:54:43,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:43,716 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-16 10:54:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:43,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:43,716 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:43,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-16 10:54:43,918 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:43,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:43,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-16 10:54:43,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:43,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826706797] [2020-10-16 10:54:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:44,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826706797] [2020-10-16 10:54:44,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462350155] [2020-10-16 10:54:44,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:44,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:54:44,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:44,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:44,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:44,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:44,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:44,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:44,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254902250] [2020-10-16 10:54:44,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:44,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:44,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:44,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:44,398 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-16 10:54:45,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:45,075 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-16 10:54:45,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:54:45,076 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:45,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:45,077 INFO L225 Difference]: With dead ends: 122 [2020-10-16 10:54:45,077 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 10:54:45,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:54:45,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 10:54:45,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-16 10:54:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 10:54:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-16 10:54:45,079 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-16 10:54:45,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:45,079 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-16 10:54:45,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:45,079 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-16 10:54:45,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:45,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:45,080 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:45,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-16 10:54:45,281 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:45,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:45,281 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-16 10:54:45,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:45,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294651661] [2020-10-16 10:54:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:45,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294651661] [2020-10-16 10:54:45,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237314644] [2020-10-16 10:54:45,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:45,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:45,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:45,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:45,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:45,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063705823] [2020-10-16 10:54:45,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:45,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:45,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:45,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:45,742 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-16 10:54:46,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:46,455 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-16 10:54:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:54:46,456 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:46,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:46,456 INFO L225 Difference]: With dead ends: 123 [2020-10-16 10:54:46,457 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:54:46,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:54:46,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:54:46,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-16 10:54:46,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:54:46,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-16 10:54:46,459 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-16 10:54:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:46,459 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-16 10:54:46,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-16 10:54:46,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:46,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:46,460 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:46,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-16 10:54:46,660 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:46,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:46,661 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-16 10:54:46,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:46,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952302464] [2020-10-16 10:54:46,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:47,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952302464] [2020-10-16 10:54:47,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956311393] [2020-10-16 10:54:47,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:47,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:47,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:47,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:47,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:47,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:47,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:47,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:47,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412730165] [2020-10-16 10:54:47,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:47,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:47,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:47,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:47,149 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-16 10:54:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:47,917 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-16 10:54:47,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:54:47,917 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:47,918 INFO L225 Difference]: With dead ends: 139 [2020-10-16 10:54:47,918 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 10:54:47,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:54:47,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 10:54:47,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-16 10:54:47,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:54:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-16 10:54:47,922 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-16 10:54:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:47,922 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-16 10:54:47,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-16 10:54:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:47,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:47,923 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:48,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-16 10:54:48,132 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:48,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:48,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-16 10:54:48,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:48,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778020277] [2020-10-16 10:54:48,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:48,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778020277] [2020-10-16 10:54:48,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407312808] [2020-10-16 10:54:48,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:48,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 10:54:48,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:48,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:48,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:48,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:48,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:48,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269493179] [2020-10-16 10:54:48,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:48,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:48,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:48,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:48,561 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-16 10:54:49,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:49,364 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-16 10:54:49,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:54:49,365 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:49,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:49,365 INFO L225 Difference]: With dead ends: 139 [2020-10-16 10:54:49,365 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 10:54:49,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:54:49,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 10:54:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-16 10:54:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 10:54:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-16 10:54:49,368 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-16 10:54:49,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:49,368 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-16 10:54:49,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:49,368 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-16 10:54:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:49,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:49,368 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:49,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:49,569 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:49,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:49,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-16 10:54:49,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:49,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110512903] [2020-10-16 10:54:49,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:49,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110512903] [2020-10-16 10:54:49,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536963752] [2020-10-16 10:54:49,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:49,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:49,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:49,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:49,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:50,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:50,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:50,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:50,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025387261] [2020-10-16 10:54:50,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:50,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:50,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:50,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:50,024 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-16 10:54:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:50,919 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-16 10:54:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:54:50,920 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:50,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:50,920 INFO L225 Difference]: With dead ends: 136 [2020-10-16 10:54:50,920 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 10:54:50,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:54:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 10:54:50,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-16 10:54:50,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:54:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-16 10:54:50,922 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-16 10:54:50,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:50,923 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-16 10:54:50,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:50,923 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-16 10:54:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:50,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:50,923 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:51,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-16 10:54:51,124 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:51,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:51,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-16 10:54:51,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:51,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412096778] [2020-10-16 10:54:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:51,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412096778] [2020-10-16 10:54:51,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055798928] [2020-10-16 10:54:51,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:51,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:54:51,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:51,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:51,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:51,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:51,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:51,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259778179] [2020-10-16 10:54:51,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:51,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:51,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:51,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:51,534 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-16 10:54:52,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:52,402 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-16 10:54:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:54:52,402 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:52,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:52,403 INFO L225 Difference]: With dead ends: 137 [2020-10-16 10:54:52,403 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 10:54:52,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:54:52,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 10:54:52,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-16 10:54:52,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 10:54:52,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-16 10:54:52,406 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-16 10:54:52,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:52,406 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-16 10:54:52,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:52,407 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-16 10:54:52,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:52,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:52,407 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:52,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:52,608 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:52,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:52,608 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-16 10:54:52,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:52,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165849192] [2020-10-16 10:54:52,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:52,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165849192] [2020-10-16 10:54:52,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106292019] [2020-10-16 10:54:52,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:53,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:54:53,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:53,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:53,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:53,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:53,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:53,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:53,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066832482] [2020-10-16 10:54:53,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:53,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:53,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:53,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:53,058 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-16 10:54:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:54,123 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-16 10:54:54,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:54:54,124 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:54,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:54,124 INFO L225 Difference]: With dead ends: 134 [2020-10-16 10:54:54,124 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 10:54:54,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:54:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 10:54:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-16 10:54:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 10:54:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-16 10:54:54,126 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-16 10:54:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:54,127 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-16 10:54:54,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-16 10:54:54,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:54,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:54,127 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:54,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-16 10:54:54,331 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:54,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:54,331 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-16 10:54:54,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:54,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834292295] [2020-10-16 10:54:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:54,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834292295] [2020-10-16 10:54:54,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936527681] [2020-10-16 10:54:54,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:54,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:54,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:54,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:54,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:54,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523714302] [2020-10-16 10:54:54,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:54,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:54,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:54,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:54,728 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-16 10:54:55,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:55,677 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-16 10:54:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:54:55,678 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:55,679 INFO L225 Difference]: With dead ends: 135 [2020-10-16 10:54:55,679 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 10:54:55,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 10:54:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 10:54:55,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-16 10:54:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:54:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-16 10:54:55,681 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-16 10:54:55,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:55,682 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-16 10:54:55,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:55,682 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-16 10:54:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:55,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:55,682 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:55,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:55,883 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:55,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:55,883 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-16 10:54:55,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:55,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770791486] [2020-10-16 10:54:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:56,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770791486] [2020-10-16 10:54:56,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226322172] [2020-10-16 10:54:56,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:56,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:56,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:56,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:56,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:56,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:56,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:56,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:56,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064634117] [2020-10-16 10:54:56,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:56,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:56,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:56,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:56,315 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-16 10:54:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:57,418 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-16 10:54:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:54:57,419 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:57,420 INFO L225 Difference]: With dead ends: 132 [2020-10-16 10:54:57,420 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 10:54:57,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 10:54:57,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 10:54:57,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-16 10:54:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:54:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-16 10:54:57,423 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-16 10:54:57,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:57,423 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-16 10:54:57,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-16 10:54:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:57,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:57,423 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:57,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:57,624 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:57,625 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-16 10:54:57,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:57,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056076364] [2020-10-16 10:54:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:57,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056076364] [2020-10-16 10:54:57,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270829951] [2020-10-16 10:54:57,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:58,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 10:54:58,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:58,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:58,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:58,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:58,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:58,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977248670] [2020-10-16 10:54:58,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:58,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:58,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:58,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:58,029 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-16 10:54:59,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:59,052 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-16 10:54:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:54:59,052 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:59,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:59,053 INFO L225 Difference]: With dead ends: 133 [2020-10-16 10:54:59,053 INFO L226 Difference]: Without dead ends: 127 [2020-10-16 10:54:59,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:54:59,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-16 10:54:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-16 10:54:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 10:54:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-16 10:54:59,055 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-16 10:54:59,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:59,056 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-16 10:54:59,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-16 10:54:59,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:59,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:59,056 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:59,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:59,257 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:59,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:59,257 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-16 10:54:59,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:59,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393570043] [2020-10-16 10:54:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:59,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393570043] [2020-10-16 10:54:59,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539980552] [2020-10-16 10:54:59,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:59,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:59,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:59,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:59,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:59,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:59,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:59,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:59,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176589779] [2020-10-16 10:54:59,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:59,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:59,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:59,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:59,693 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-16 10:55:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:00,915 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-16 10:55:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:55:00,916 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:55:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:00,917 INFO L225 Difference]: With dead ends: 130 [2020-10-16 10:55:00,917 INFO L226 Difference]: Without dead ends: 124 [2020-10-16 10:55:00,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 10:55:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-16 10:55:00,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-16 10:55:00,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:55:00,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-16 10:55:00,919 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-16 10:55:00,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:00,919 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-16 10:55:00,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:00,920 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-16 10:55:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:00,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:00,920 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:01,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:01,121 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:01,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:01,122 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-16 10:55:01,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:01,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444918246] [2020-10-16 10:55:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:01,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444918246] [2020-10-16 10:55:01,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890515017] [2020-10-16 10:55:01,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:01,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:55:01,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:01,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:01,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:01,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:01,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:55:01,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674042982] [2020-10-16 10:55:01,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:55:01,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:01,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:55:01,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:55:01,523 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-16 10:55:02,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:02,615 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-16 10:55:02,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 10:55:02,616 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:55:02,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:02,616 INFO L225 Difference]: With dead ends: 131 [2020-10-16 10:55:02,616 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 10:55:02,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 10:55:02,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 10:55:02,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-16 10:55:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 10:55:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-16 10:55:02,619 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-16 10:55:02,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:02,619 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-16 10:55:02,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:55:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-16 10:55:02,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:02,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:02,620 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:02,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-16 10:55:02,821 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:02,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-16 10:55:02,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:02,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178715502] [2020-10-16 10:55:02,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:03,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178715502] [2020-10-16 10:55:03,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083067391] [2020-10-16 10:55:03,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:03,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:55:03,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:03,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:03,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:03,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:03,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:03,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:55:03,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652615573] [2020-10-16 10:55:03,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:03,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:03,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:03,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:03,244 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-16 10:55:04,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:04,588 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-16 10:55:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 10:55:04,589 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:55:04,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:04,589 INFO L225 Difference]: With dead ends: 128 [2020-10-16 10:55:04,589 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 10:55:04,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 10:55:04,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 10:55:04,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-16 10:55:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 10:55:04,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-16 10:55:04,592 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-16 10:55:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:04,592 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-16 10:55:04,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:04,593 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-16 10:55:04,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:04,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:04,593 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:04,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-16 10:55:04,794 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:04,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:04,794 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-16 10:55:04,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:04,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979180546] [2020-10-16 10:55:04,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:05,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979180546] [2020-10-16 10:55:05,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548216417] [2020-10-16 10:55:05,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:05,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:05,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:05,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:05,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:55:05,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829431679] [2020-10-16 10:55:05,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:55:05,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:05,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:55:05,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:55:05,180 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-16 10:55:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:06,345 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-16 10:55:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:55:06,346 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:55:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:06,346 INFO L225 Difference]: With dead ends: 129 [2020-10-16 10:55:06,346 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 10:55:06,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 10:55:06,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 10:55:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-16 10:55:06,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:55:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:55:06,348 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-16 10:55:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:06,349 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:55:06,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:55:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:55:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:06,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:06,349 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:06,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-16 10:55:06,550 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:06,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:06,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-16 10:55:06,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:06,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252456202] [2020-10-16 10:55:06,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:06,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252456202] [2020-10-16 10:55:06,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324806806] [2020-10-16 10:55:06,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:06,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:55:06,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:06,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:06,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:06,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:06,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:06,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:55:06,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489936175] [2020-10-16 10:55:06,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:06,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:06,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:06,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:06,967 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-16 10:55:08,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:08,401 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-16 10:55:08,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 10:55:08,401 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:55:08,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:08,402 INFO L225 Difference]: With dead ends: 126 [2020-10-16 10:55:08,402 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 10:55:08,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-16 10:55:08,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 10:55:08,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-16 10:55:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:55:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:55:08,405 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-16 10:55:08,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:08,405 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:55:08,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:55:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:08,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:08,406 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:08,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-16 10:55:08,606 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:08,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:08,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-16 10:55:08,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:08,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667330355] [2020-10-16 10:55:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:08,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667330355] [2020-10-16 10:55:08,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680527312] [2020-10-16 10:55:08,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:08,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 10:55:08,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:08,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:08,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:09,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:09,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:55:09,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833522875] [2020-10-16 10:55:09,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:55:09,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:09,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:55:09,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:55:09,008 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-16 10:55:10,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:10,261 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-16 10:55:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 10:55:10,262 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:55:10,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:10,263 INFO L225 Difference]: With dead ends: 127 [2020-10-16 10:55:10,263 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 10:55:10,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 10:55:10,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 10:55:10,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-16 10:55:10,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-16 10:55:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-16 10:55:10,265 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-16 10:55:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:10,266 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-16 10:55:10,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:55:10,266 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-16 10:55:10,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:10,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:10,266 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:10,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:10,467 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:10,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:10,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-16 10:55:10,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:10,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194759556] [2020-10-16 10:55:10,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:10,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194759556] [2020-10-16 10:55:10,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811053816] [2020-10-16 10:55:10,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:10,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:55:10,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:10,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:10,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:10,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:10,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:10,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:55:10,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007071714] [2020-10-16 10:55:10,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:10,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:10,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:10,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:10,871 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-16 10:55:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:12,437 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-16 10:55:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 10:55:12,438 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:55:12,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:12,438 INFO L225 Difference]: With dead ends: 124 [2020-10-16 10:55:12,438 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 10:55:12,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 10:55:12,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 10:55:12,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-16 10:55:12,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 10:55:12,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-16 10:55:12,441 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-16 10:55:12,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:12,441 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-16 10:55:12,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-16 10:55:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:12,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:12,442 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:12,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-16 10:55:12,643 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:12,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:12,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-16 10:55:12,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:12,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82716440] [2020-10-16 10:55:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:12,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82716440] [2020-10-16 10:55:12,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531596013] [2020-10-16 10:55:12,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:13,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:55:13,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:13,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:13,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:13,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:13,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:55:13,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556157060] [2020-10-16 10:55:13,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:55:13,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:13,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:55:13,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:55:13,035 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-16 10:55:14,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:14,365 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-16 10:55:14,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 10:55:14,366 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:55:14,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:14,367 INFO L225 Difference]: With dead ends: 144 [2020-10-16 10:55:14,367 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 10:55:14,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-16 10:55:14,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 10:55:14,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-16 10:55:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 10:55:14,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-16 10:55:14,370 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-16 10:55:14,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:14,371 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-16 10:55:14,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:55:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-16 10:55:14,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:14,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:14,371 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:14,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:14,580 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:14,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-16 10:55:14,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:14,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972183348] [2020-10-16 10:55:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:14,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972183348] [2020-10-16 10:55:14,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496697301] [2020-10-16 10:55:14,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:14,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:55:14,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:14,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:14,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:14,957 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:14,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:14,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:55:14,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200762747] [2020-10-16 10:55:14,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:14,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:14,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:14,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:14,989 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-16 10:55:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:16,621 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-16 10:55:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 10:55:16,622 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:55:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:16,623 INFO L225 Difference]: With dead ends: 125 [2020-10-16 10:55:16,623 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:55:16,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 10:55:16,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:55:16,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-16 10:55:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 10:55:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-16 10:55:16,625 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-16 10:55:16,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:16,625 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-16 10:55:16,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-16 10:55:16,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:16,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:16,626 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:16,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-16 10:55:16,827 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:16,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:16,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-16 10:55:16,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:16,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655375181] [2020-10-16 10:55:16,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:17,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655375181] [2020-10-16 10:55:17,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635994033] [2020-10-16 10:55:17,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:17,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:17,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:17,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:17,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:17,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538628565] [2020-10-16 10:55:17,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:17,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:17,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:17,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:17,325 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-16 10:55:18,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:18,064 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-10-16 10:55:18,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:55:18,066 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:18,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:18,066 INFO L225 Difference]: With dead ends: 144 [2020-10-16 10:55:18,066 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 10:55:18,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:55:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 10:55:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-10-16 10:55:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:18,069 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:18,069 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:18,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:18,069 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:18,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:18,070 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:18,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:18,271 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:18,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:18,271 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-10-16 10:55:18,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:18,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26280462] [2020-10-16 10:55:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:18,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26280462] [2020-10-16 10:55:18,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813616794] [2020-10-16 10:55:18,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:18,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:55:18,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:18,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:18,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:18,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:18,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:18,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:55:18,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197815673] [2020-10-16 10:55:18,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:55:18,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:18,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:55:18,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:55:18,829 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 10:55:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:19,656 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-10-16 10:55:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:55:19,657 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 10:55:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:19,658 INFO L225 Difference]: With dead ends: 141 [2020-10-16 10:55:19,658 INFO L226 Difference]: Without dead ends: 135 [2020-10-16 10:55:19,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:55:19,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-16 10:55:19,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-10-16 10:55:19,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:55:19,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 10:55:19,661 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 10:55:19,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:19,661 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 10:55:19,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:55:19,661 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 10:55:19,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:19,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:19,661 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:19,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-10-16 10:55:19,862 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:19,863 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-10-16 10:55:19,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:19,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318084976] [2020-10-16 10:55:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:20,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318084976] [2020-10-16 10:55:20,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238374661] [2020-10-16 10:55:20,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:20,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 10:55:20,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:20,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:20,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:20,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:20,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:20,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827702298] [2020-10-16 10:55:20,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:20,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:20,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:20,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:20,360 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 10:55:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:21,148 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-10-16 10:55:21,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:55:21,149 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:21,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:21,150 INFO L225 Difference]: With dead ends: 138 [2020-10-16 10:55:21,150 INFO L226 Difference]: Without dead ends: 132 [2020-10-16 10:55:21,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:55:21,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-16 10:55:21,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-10-16 10:55:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:21,153 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:21,153 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:21,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:21,153 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:21,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:21,153 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:21,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:21,354 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:21,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:21,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-10-16 10:55:21,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:21,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636148214] [2020-10-16 10:55:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:21,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636148214] [2020-10-16 10:55:21,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934607514] [2020-10-16 10:55:21,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:21,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:55:21,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:21,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:21,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:21,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:21,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:21,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:55:21,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818068197] [2020-10-16 10:55:21,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:55:21,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:21,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:55:21,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:55:21,878 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 10:55:22,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:22,864 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-16 10:55:22,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:55:22,865 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 10:55:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:22,866 INFO L225 Difference]: With dead ends: 137 [2020-10-16 10:55:22,866 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 10:55:22,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:55:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 10:55:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-10-16 10:55:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:55:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 10:55:22,869 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 10:55:22,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:22,869 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 10:55:22,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:55:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 10:55:22,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:22,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:22,870 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:23,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-10-16 10:55:23,071 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:23,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:23,071 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-10-16 10:55:23,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:23,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18425958] [2020-10-16 10:55:23,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:23,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18425958] [2020-10-16 10:55:23,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827987604] [2020-10-16 10:55:23,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:23,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:55:23,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:23,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:23,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:23,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:23,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:23,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276165530] [2020-10-16 10:55:23,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:23,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:23,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:23,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:23,539 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 10:55:24,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:24,451 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-16 10:55:24,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:55:24,452 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:24,453 INFO L225 Difference]: With dead ends: 134 [2020-10-16 10:55:24,453 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 10:55:24,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:55:24,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 10:55:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-16 10:55:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:24,456 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:24,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:24,456 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:24,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:24,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:24,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:24,457 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:24,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-16 10:55:24,665 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:24,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:24,665 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-10-16 10:55:24,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:24,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866924141] [2020-10-16 10:55:24,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:25,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866924141] [2020-10-16 10:55:25,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136848341] [2020-10-16 10:55:25,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:25,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:55:25,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:25,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:25,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:25,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:25,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:25,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:55:25,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927271090] [2020-10-16 10:55:25,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:55:25,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:25,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:55:25,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:55:25,183 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 10:55:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:26,284 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-16 10:55:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:55:26,285 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 10:55:26,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:26,286 INFO L225 Difference]: With dead ends: 133 [2020-10-16 10:55:26,286 INFO L226 Difference]: Without dead ends: 127 [2020-10-16 10:55:26,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 10:55:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-16 10:55:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-10-16 10:55:26,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:55:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 10:55:26,289 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 10:55:26,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:26,289 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 10:55:26,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:55:26,289 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 10:55:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:26,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:26,290 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:26,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-16 10:55:26,494 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:26,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:26,494 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-10-16 10:55:26,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:26,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982147132] [2020-10-16 10:55:26,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:26,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982147132] [2020-10-16 10:55:26,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515519867] [2020-10-16 10:55:26,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:26,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:26,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:26,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:26,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:26,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677938048] [2020-10-16 10:55:26,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:26,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:26,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:26,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:26,958 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 10:55:27,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:27,967 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-10-16 10:55:27,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:55:27,969 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:27,969 INFO L225 Difference]: With dead ends: 130 [2020-10-16 10:55:27,969 INFO L226 Difference]: Without dead ends: 124 [2020-10-16 10:55:27,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:55:27,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-16 10:55:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-10-16 10:55:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:27,973 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:27,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:27,973 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:27,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:27,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:27,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:27,973 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:28,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:28,176 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:28,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:28,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-10-16 10:55:28,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:28,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263419295] [2020-10-16 10:55:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:28,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263419295] [2020-10-16 10:55:28,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040086203] [2020-10-16 10:55:28,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:28,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:55:28,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:28,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:28,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:28,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:28,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:28,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:55:28,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360944877] [2020-10-16 10:55:28,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:55:28,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:28,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:55:28,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:55:28,674 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 10:55:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:29,908 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-16 10:55:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:55:29,909 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 10:55:29,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:29,910 INFO L225 Difference]: With dead ends: 129 [2020-10-16 10:55:29,910 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 10:55:29,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:55:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 10:55:29,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-10-16 10:55:29,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:55:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 10:55:29,913 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 10:55:29,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:29,913 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 10:55:29,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:55:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 10:55:29,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:29,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:29,914 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:30,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-16 10:55:30,115 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:30,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:30,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-10-16 10:55:30,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:30,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316168054] [2020-10-16 10:55:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:30,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316168054] [2020-10-16 10:55:30,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765396237] [2020-10-16 10:55:30,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:30,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 10:55:30,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:30,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:30,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:30,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:30,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:30,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800931898] [2020-10-16 10:55:30,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:30,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:30,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:30,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:30,560 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 10:55:31,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:31,654 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-10-16 10:55:31,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:55:31,655 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:31,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:31,655 INFO L225 Difference]: With dead ends: 126 [2020-10-16 10:55:31,656 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 10:55:31,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 10:55:31,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 10:55:31,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-10-16 10:55:31,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:31,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:31,659 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:31,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:31,659 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:31,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:31,659 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:31,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:31,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:31,659 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:31,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:31,860 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:31,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:31,861 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-10-16 10:55:31,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:31,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633581936] [2020-10-16 10:55:31,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:32,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633581936] [2020-10-16 10:55:32,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283508035] [2020-10-16 10:55:32,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:32,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:55:32,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:32,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:32,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:32,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:32,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:32,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:55:32,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754418076] [2020-10-16 10:55:32,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:55:32,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:32,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:55:32,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:55:32,349 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 10:55:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:33,697 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-10-16 10:55:33,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:55:33,699 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 10:55:33,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:33,699 INFO L225 Difference]: With dead ends: 125 [2020-10-16 10:55:33,699 INFO L226 Difference]: Without dead ends: 119 [2020-10-16 10:55:33,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 10:55:33,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-16 10:55:33,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-10-16 10:55:33,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:55:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 10:55:33,702 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 10:55:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:33,702 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 10:55:33,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:55:33,702 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 10:55:33,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:33,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:33,703 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:33,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-10-16 10:55:33,906 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:33,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:33,906 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-10-16 10:55:33,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:33,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149088769] [2020-10-16 10:55:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:34,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149088769] [2020-10-16 10:55:34,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793415634] [2020-10-16 10:55:34,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:34,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:55:34,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:34,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:34,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:34,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:34,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:34,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113630492] [2020-10-16 10:55:34,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:34,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:34,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:34,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:34,352 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 10:55:35,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:35,538 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-10-16 10:55:35,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:55:35,539 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:35,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:35,540 INFO L225 Difference]: With dead ends: 122 [2020-10-16 10:55:35,540 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 10:55:35,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 10:55:35,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 10:55:35,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-16 10:55:35,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:35,544 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:35,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:35,544 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:35,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:35,544 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:35,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:35,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:35,545 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:35,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:35,749 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:35,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:35,749 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-10-16 10:55:35,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:35,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775335026] [2020-10-16 10:55:35,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:36,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775335026] [2020-10-16 10:55:36,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763334548] [2020-10-16 10:55:36,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:36,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:55:36,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:36,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:36,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:36,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:36,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:36,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:55:36,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545323700] [2020-10-16 10:55:36,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:55:36,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:36,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:55:36,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:55:36,237 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 10:55:37,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:37,704 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-10-16 10:55:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 10:55:37,705 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 10:55:37,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:37,705 INFO L225 Difference]: With dead ends: 121 [2020-10-16 10:55:37,705 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 10:55:37,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 10:55:37,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 10:55:37,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-10-16 10:55:37,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:55:37,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 10:55:37,708 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 10:55:37,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:37,708 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 10:55:37,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:55:37,708 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 10:55:37,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:37,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:37,709 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:37,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-10-16 10:55:37,910 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:37,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:37,910 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-10-16 10:55:37,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:37,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595750188] [2020-10-16 10:55:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:38,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595750188] [2020-10-16 10:55:38,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050694874] [2020-10-16 10:55:38,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:38,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:38,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:38,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:38,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:38,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694691518] [2020-10-16 10:55:38,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:38,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:38,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:38,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:38,339 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 10:55:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:39,583 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-10-16 10:55:39,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 10:55:39,584 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:39,585 INFO L225 Difference]: With dead ends: 118 [2020-10-16 10:55:39,585 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 10:55:39,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 10:55:39,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 10:55:39,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-10-16 10:55:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:39,587 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:39,587 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:39,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:39,588 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:39,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:39,588 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:39,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:39,789 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:39,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:39,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-10-16 10:55:39,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:39,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888558141] [2020-10-16 10:55:39,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:40,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888558141] [2020-10-16 10:55:40,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830401394] [2020-10-16 10:55:40,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:40,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:55:40,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:40,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:40,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:40,233 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:40,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:40,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:55:40,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924721971] [2020-10-16 10:55:40,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:55:40,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:40,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:55:40,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:55:40,255 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 10:55:41,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:41,854 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-10-16 10:55:41,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 10:55:41,855 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 10:55:41,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:41,855 INFO L225 Difference]: With dead ends: 117 [2020-10-16 10:55:41,855 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 10:55:41,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 10:55:41,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 10:55:41,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-10-16 10:55:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:55:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 10:55:41,858 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 10:55:41,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:41,859 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 10:55:41,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:55:41,859 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 10:55:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:41,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:41,859 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:42,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:42,060 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:42,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-10-16 10:55:42,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:42,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423291333] [2020-10-16 10:55:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:42,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423291333] [2020-10-16 10:55:42,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138775516] [2020-10-16 10:55:42,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:42,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 10:55:42,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:42,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:42,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:42,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:42,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:42,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360435313] [2020-10-16 10:55:42,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:42,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:42,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:42,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:42,504 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 10:55:43,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:43,863 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-16 10:55:43,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:55:43,864 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:43,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:43,865 INFO L225 Difference]: With dead ends: 114 [2020-10-16 10:55:43,865 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 10:55:43,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-16 10:55:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 10:55:43,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-16 10:55:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:43,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:43,867 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:43,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:43,867 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:43,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:43,868 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:43,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:43,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:43,868 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:44,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-16 10:55:44,069 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:44,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-10-16 10:55:44,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:44,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897649190] [2020-10-16 10:55:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:44,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897649190] [2020-10-16 10:55:44,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121843387] [2020-10-16 10:55:44,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:44,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:55:44,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:44,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:44,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:44,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:44,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:44,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:55:44,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317478672] [2020-10-16 10:55:44,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:55:44,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:44,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:55:44,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:55:44,542 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 10:55:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:46,290 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-16 10:55:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 10:55:46,291 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 10:55:46,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:46,292 INFO L225 Difference]: With dead ends: 113 [2020-10-16 10:55:46,292 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 10:55:46,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-10-16 10:55:46,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 10:55:46,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-10-16 10:55:46,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:55:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 10:55:46,294 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 10:55:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:46,294 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 10:55:46,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:55:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 10:55:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:46,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:46,295 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:46,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-16 10:55:46,496 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:46,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:46,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-10-16 10:55:46,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:46,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424066298] [2020-10-16 10:55:46,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:46,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424066298] [2020-10-16 10:55:46,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903592344] [2020-10-16 10:55:46,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:46,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:55:46,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:46,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:46,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:46,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:46,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:46,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457712936] [2020-10-16 10:55:46,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:46,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:46,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:46,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:46,946 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 10:55:48,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:48,432 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-10-16 10:55:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 10:55:48,433 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 10:55:48,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:48,434 INFO L225 Difference]: With dead ends: 110 [2020-10-16 10:55:48,434 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 10:55:48,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 10:55:48,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 10:55:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-10-16 10:55:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 10:55:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 10:55:48,436 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 10:55:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:48,436 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 10:55:48,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 10:55:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:48,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:48,437 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:48,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-16 10:55:48,638 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:48,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:48,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-10-16 10:55:48,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:48,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564562989] [2020-10-16 10:55:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:48,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564562989] [2020-10-16 10:55:48,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124018656] [2020-10-16 10:55:48,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:49,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:55:49,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:49,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:49,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:49,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:49,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:49,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 10:55:49,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427931131] [2020-10-16 10:55:49,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 10:55:49,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:49,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 10:55:49,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:55:49,107 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 10:55:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:51,015 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-10-16 10:55:51,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 10:55:51,017 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 10:55:51,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:51,017 INFO L225 Difference]: With dead ends: 109 [2020-10-16 10:55:51,018 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 10:55:51,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-10-16 10:55:51,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 10:55:51,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-16 10:55:51,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:55:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 10:55:51,019 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 10:55:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:51,020 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 10:55:51,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 10:55:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 10:55:51,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:51,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:51,020 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:51,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-16 10:55:51,221 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:51,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:51,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-10-16 10:55:51,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:51,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058109570] [2020-10-16 10:55:51,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:51,572 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:51,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058109570] [2020-10-16 10:55:51,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043756093] [2020-10-16 10:55:51,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:51,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 10:55:51,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:51,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:51,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 10:55:51,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977852666] [2020-10-16 10:55:51,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:51,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:51,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:51,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:51,660 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. Received shutdown request... [2020-10-16 10:55:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:55:52,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-16 10:55:52,263 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 10:55:52,267 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 10:55:52,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 10:55:52 BasicIcfg [2020-10-16 10:55:52,268 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 10:55:52,270 INFO L168 Benchmark]: Toolchain (without parser) took 271016.22 ms. Allocated memory was 137.9 MB in the beginning and 188.2 MB in the end (delta: 50.3 MB). Free memory was 100.2 MB in the beginning and 53.9 MB in the end (delta: 46.3 MB). Peak memory consumption was 96.7 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:52,272 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.0 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-10-16 10:55:52,272 INFO L168 Benchmark]: CACSL2BoogieTranslator took 813.02 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 99.8 MB in the beginning and 160.5 MB in the end (delta: -60.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:52,273 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.94 ms. Allocated memory is still 200.8 MB. Free memory was 160.5 MB in the beginning and 158.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:52,275 INFO L168 Benchmark]: Boogie Preprocessor took 27.46 ms. Allocated memory is still 200.8 MB. Free memory was 158.5 MB in the beginning and 157.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:52,275 INFO L168 Benchmark]: RCFGBuilder took 412.94 ms. Allocated memory is still 200.8 MB. Free memory was 157.5 MB in the beginning and 136.8 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:52,276 INFO L168 Benchmark]: TraceAbstraction took 269706.23 ms. Allocated memory was 200.8 MB in the beginning and 188.2 MB in the end (delta: -12.6 MB). Free memory was 135.8 MB in the beginning and 53.9 MB in the end (delta: 81.9 MB). Peak memory consumption was 69.3 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:52,278 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.0 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 813.02 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 99.8 MB in the beginning and 160.5 MB in the end (delta: -60.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.94 ms. Allocated memory is still 200.8 MB. Free memory was 160.5 MB in the beginning and 158.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.46 ms. Allocated memory is still 200.8 MB. Free memory was 158.5 MB in the beginning and 157.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 412.94 ms. Allocated memory is still 200.8 MB. Free memory was 157.5 MB in the beginning and 136.8 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 269706.23 ms. Allocated memory was 200.8 MB in the beginning and 188.2 MB in the end (delta: -12.6 MB). Free memory was 135.8 MB in the beginning and 53.9 MB in the end (delta: 81.9 MB). Peak memory consumption was 69.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was constructing difference of abstraction (92states) and FLOYD_HOARE automaton (currently 16 states, 24 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 38 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 269.5s, OverallIterations: 237, TraceHistogramMax: 10, AutomataDifference: 153.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3795 SDtfs, 13625 SDslu, 24699 SDs, 0 SdLazy, 26827 SolverSat, 15937 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13364 GetRequests, 4399 SyntacticMatches, 232 SemanticMatches, 8732 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88101 ImplicationChecksByTransitivity, 158.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 236 MinimizatonAttempts, 5995 StatesRemovedByMinimization, 235 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 5.3s SatisfiabilityAnalysisTime, 51.6s InterpolantComputationTime, 10018 NumberOfCodeBlocks, 10018 NumberOfCodeBlocksAsserted, 1242 NumberOfCheckSat, 9549 ConstructedInterpolants, 0 QuantifiedInterpolants, 936187 SizeOfPredicates, 3131 NumberOfNonLiveVariables, 30503 ConjunctsInSsa, 4060 ConjunctsInUnsatCore, 469 InterpolantComputations, 5 PerfectInterpolantSequences, 0/20670 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown