/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-11 15:11:00,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-11 15:11:00,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-11 15:11:00,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-11 15:11:00,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-11 15:11:00,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-11 15:11:00,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-11 15:11:00,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-11 15:11:00,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-11 15:11:00,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-11 15:11:00,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-11 15:11:00,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-11 15:11:00,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-11 15:11:00,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-11 15:11:00,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-11 15:11:00,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-11 15:11:00,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-11 15:11:00,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-11 15:11:00,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-11 15:11:00,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-11 15:11:00,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-11 15:11:00,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-11 15:11:00,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-11 15:11:00,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-11 15:11:00,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-11 15:11:00,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-11 15:11:00,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-11 15:11:00,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-11 15:11:00,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-11 15:11:00,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-11 15:11:00,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-11 15:11:00,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-11 15:11:00,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-11 15:11:00,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-11 15:11:00,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-11 15:11:00,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-11 15:11:00,197 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2020-11-11 15:11:00,226 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-11 15:11:00,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-11 15:11:00,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-11 15:11:00,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-11 15:11:00,228 INFO L138 SettingsManager]: * Use SBE=true [2020-11-11 15:11:00,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-11 15:11:00,229 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-11 15:11:00,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-11 15:11:00,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-11 15:11:00,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-11 15:11:00,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-11 15:11:00,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-11 15:11:00,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-11 15:11:00,231 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-11 15:11:00,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-11 15:11:00,231 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-11 15:11:00,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-11 15:11:00,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-11 15:11:00,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-11 15:11:00,233 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-11 15:11:00,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-11 15:11:00,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 15:11:00,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-11 15:11:00,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-11 15:11:00,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-11 15:11:00,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-11 15:11:00,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-11 15:11:00,235 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-11 15:11:00,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-11 15:11:00,235 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-11 15:11:00,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-11 15:11:00,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-11 15:11:00,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-11 15:11:00,707 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-11 15:11:00,708 INFO L275 PluginConnector]: CDTParser initialized [2020-11-11 15:11:00,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-11-11 15:11:00,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5d954d4e/c1b65b2ace1e47c7b5e2562046c3b63f/FLAGf26de8862 [2020-11-11 15:11:01,657 INFO L306 CDTParser]: Found 1 translation units. [2020-11-11 15:11:01,658 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-11-11 15:11:01,680 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5d954d4e/c1b65b2ace1e47c7b5e2562046c3b63f/FLAGf26de8862 [2020-11-11 15:11:01,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5d954d4e/c1b65b2ace1e47c7b5e2562046c3b63f [2020-11-11 15:11:01,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-11 15:11:01,865 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-11 15:11:01,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-11 15:11:01,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-11 15:11:01,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-11 15:11:01,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:11:01" (1/1) ... [2020-11-11 15:11:01,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36fec766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:01, skipping insertion in model container [2020-11-11 15:11:01,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:11:01" (1/1) ... [2020-11-11 15:11:01,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-11 15:11:01,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-11 15:11:02,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 15:11:02,404 INFO L203 MainTranslator]: Completed pre-run [2020-11-11 15:11:02,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 15:11:02,598 INFO L208 MainTranslator]: Completed translation [2020-11-11 15:11:02,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:02 WrapperNode [2020-11-11 15:11:02,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-11 15:11:02,601 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-11 15:11:02,601 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-11 15:11:02,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-11 15:11:02,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:02" (1/1) ... [2020-11-11 15:11:02,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:02" (1/1) ... [2020-11-11 15:11:02,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-11 15:11:02,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-11 15:11:02,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-11 15:11:02,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-11 15:11:02,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:02" (1/1) ... [2020-11-11 15:11:02,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:02" (1/1) ... [2020-11-11 15:11:02,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:02" (1/1) ... [2020-11-11 15:11:02,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:02" (1/1) ... [2020-11-11 15:11:02,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:02" (1/1) ... [2020-11-11 15:11:02,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:02" (1/1) ... [2020-11-11 15:11:02,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:02" (1/1) ... [2020-11-11 15:11:02,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-11 15:11:02,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-11 15:11:02,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-11 15:11:02,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-11 15:11:02,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 15:11:02,774 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-11 15:11:02,775 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-11 15:11:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-11 15:11:02,775 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-11 15:11:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-11 15:11:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-11 15:11:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-11 15:11:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-11 15:11:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-11 15:11:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-11 15:11:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-11 15:11:02,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-11 15:11:02,778 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-11 15:11:03,282 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-11 15:11:03,282 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-11 15:11:03,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:11:03 BoogieIcfgContainer [2020-11-11 15:11:03,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-11 15:11:03,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-11 15:11:03,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-11 15:11:03,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-11 15:11:03,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 03:11:01" (1/3) ... [2020-11-11 15:11:03,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca06056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:11:03, skipping insertion in model container [2020-11-11 15:11:03,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:02" (2/3) ... [2020-11-11 15:11:03,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca06056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:11:03, skipping insertion in model container [2020-11-11 15:11:03,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:11:03" (3/3) ... [2020-11-11 15:11:03,299 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-11-11 15:11:03,319 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-11 15:11:03,319 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-11 15:11:03,324 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-11 15:11:03,325 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-11 15:11:03,374 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,375 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,375 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,375 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,376 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,376 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,377 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,377 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,377 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,378 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,378 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,379 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,380 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,380 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,380 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,380 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,381 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,381 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,382 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,382 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,382 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,383 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,383 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,383 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,383 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,383 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,384 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,384 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,386 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,386 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,386 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,386 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,387 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,387 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,387 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,387 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,387 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,388 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,389 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,389 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,389 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,390 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,391 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,391 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,391 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,392 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,392 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,392 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,393 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,393 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,394 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,394 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,394 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,394 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,394 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,395 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,398 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,399 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,399 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,399 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,400 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,400 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,408 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,409 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,409 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,409 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,409 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,409 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:03,417 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-11 15:11:03,433 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-11 15:11:03,476 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-11 15:11:03,476 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-11 15:11:03,476 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-11 15:11:03,477 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-11 15:11:03,477 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-11 15:11:03,477 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-11 15:11:03,477 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-11 15:11:03,477 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-11 15:11:03,496 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 138 flow [2020-11-11 15:11:03,673 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:03,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-11 15:11:03,713 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:03,714 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:03,714 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:03,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:03,737 INFO L82 PathProgramCache]: Analyzing trace with hash 27863943, now seen corresponding path program 1 times [2020-11-11 15:11:03,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:03,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195816105] [2020-11-11 15:11:03,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:04,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195816105] [2020-11-11 15:11:04,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:04,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:11:04,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209533662] [2020-11-11 15:11:04,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:11:04,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:04,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:11:04,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:11:04,262 INFO L87 Difference]: Start difference. First operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:04,483 INFO L93 Difference]: Finished difference Result 3507 states and 10199 transitions. [2020-11-11 15:11:04,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-11 15:11:04,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2020-11-11 15:11:04,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:04,513 INFO L225 Difference]: With dead ends: 3507 [2020-11-11 15:11:04,514 INFO L226 Difference]: Without dead ends: 1291 [2020-11-11 15:11:04,515 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:04,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2020-11-11 15:11:04,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 951. [2020-11-11 15:11:04,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 2.7621052631578946) internal successors, (2624), 950 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:04,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 2624 transitions. [2020-11-11 15:11:04,684 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 2624 transitions. Word has length 28 [2020-11-11 15:11:04,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:04,685 INFO L481 AbstractCegarLoop]: Abstraction has 951 states and 2624 transitions. [2020-11-11 15:11:04,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:04,685 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 2624 transitions. [2020-11-11 15:11:04,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-11 15:11:04,690 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:04,690 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:04,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-11 15:11:04,691 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:04,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:04,692 INFO L82 PathProgramCache]: Analyzing trace with hash 732293130, now seen corresponding path program 1 times [2020-11-11 15:11:04,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:04,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606676792] [2020-11-11 15:11:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:04,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606676792] [2020-11-11 15:11:04,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:04,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:11:04,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146865048] [2020-11-11 15:11:04,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:11:04,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:04,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:11:04,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:11:04,837 INFO L87 Difference]: Start difference. First operand 951 states and 2624 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:04,954 INFO L93 Difference]: Finished difference Result 1131 states and 3040 transitions. [2020-11-11 15:11:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 15:11:04,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2020-11-11 15:11:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:04,963 INFO L225 Difference]: With dead ends: 1131 [2020-11-11 15:11:04,963 INFO L226 Difference]: Without dead ends: 915 [2020-11-11 15:11:04,964 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:11:04,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2020-11-11 15:11:04,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 808. [2020-11-11 15:11:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 2.7732342007434942) internal successors, (2238), 807 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2238 transitions. [2020-11-11 15:11:05,000 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2238 transitions. Word has length 32 [2020-11-11 15:11:05,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:05,001 INFO L481 AbstractCegarLoop]: Abstraction has 808 states and 2238 transitions. [2020-11-11 15:11:05,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:05,002 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2238 transitions. [2020-11-11 15:11:05,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-11 15:11:05,005 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:05,005 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:05,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-11 15:11:05,005 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:05,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:05,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1417635940, now seen corresponding path program 1 times [2020-11-11 15:11:05,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:05,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244838129] [2020-11-11 15:11:05,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:05,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244838129] [2020-11-11 15:11:05,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:05,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:11:05,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226017256] [2020-11-11 15:11:05,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:11:05,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:05,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:11:05,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:11:05,206 INFO L87 Difference]: Start difference. First operand 808 states and 2238 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:05,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:05,311 INFO L93 Difference]: Finished difference Result 2107 states and 5756 transitions. [2020-11-11 15:11:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 15:11:05,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2020-11-11 15:11:05,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:05,325 INFO L225 Difference]: With dead ends: 2107 [2020-11-11 15:11:05,325 INFO L226 Difference]: Without dead ends: 1851 [2020-11-11 15:11:05,326 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:11:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2020-11-11 15:11:05,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 982. [2020-11-11 15:11:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 2.7533129459734966) internal successors, (2701), 981 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:05,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 2701 transitions. [2020-11-11 15:11:05,375 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 2701 transitions. Word has length 32 [2020-11-11 15:11:05,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:05,376 INFO L481 AbstractCegarLoop]: Abstraction has 982 states and 2701 transitions. [2020-11-11 15:11:05,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:05,376 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 2701 transitions. [2020-11-11 15:11:05,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-11 15:11:05,378 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:05,378 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:05,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-11 15:11:05,379 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:05,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:05,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1368897688, now seen corresponding path program 2 times [2020-11-11 15:11:05,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:05,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365583034] [2020-11-11 15:11:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:05,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365583034] [2020-11-11 15:11:05,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:05,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:11:05,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725004565] [2020-11-11 15:11:05,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:11:05,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:05,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:11:05,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:11:05,573 INFO L87 Difference]: Start difference. First operand 982 states and 2701 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:05,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:05,685 INFO L93 Difference]: Finished difference Result 1227 states and 3221 transitions. [2020-11-11 15:11:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 15:11:05,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2020-11-11 15:11:05,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:05,692 INFO L225 Difference]: With dead ends: 1227 [2020-11-11 15:11:05,692 INFO L226 Difference]: Without dead ends: 902 [2020-11-11 15:11:05,693 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:05,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2020-11-11 15:11:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 810. [2020-11-11 15:11:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 2.7169344870210135) internal successors, (2198), 809 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2198 transitions. [2020-11-11 15:11:05,722 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2198 transitions. Word has length 32 [2020-11-11 15:11:05,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:05,722 INFO L481 AbstractCegarLoop]: Abstraction has 810 states and 2198 transitions. [2020-11-11 15:11:05,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2198 transitions. [2020-11-11 15:11:05,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:11:05,725 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:05,725 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:05,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-11 15:11:05,725 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:05,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:05,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1044457191, now seen corresponding path program 1 times [2020-11-11 15:11:05,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:05,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116614157] [2020-11-11 15:11:05,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:05,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116614157] [2020-11-11 15:11:05,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:05,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-11 15:11:05,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319765920] [2020-11-11 15:11:05,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 15:11:05,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:05,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 15:11:05,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-11 15:11:05,885 INFO L87 Difference]: Start difference. First operand 810 states and 2198 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:06,025 INFO L93 Difference]: Finished difference Result 1698 states and 4550 transitions. [2020-11-11 15:11:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:11:06,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2020-11-11 15:11:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:06,037 INFO L225 Difference]: With dead ends: 1698 [2020-11-11 15:11:06,037 INFO L226 Difference]: Without dead ends: 1431 [2020-11-11 15:11:06,038 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:06,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2020-11-11 15:11:06,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 855. [2020-11-11 15:11:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 2.6814988290398127) internal successors, (2290), 854 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2290 transitions. [2020-11-11 15:11:06,075 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2290 transitions. Word has length 36 [2020-11-11 15:11:06,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:06,075 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 2290 transitions. [2020-11-11 15:11:06,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:06,075 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2290 transitions. [2020-11-11 15:11:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:11:06,077 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:06,078 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:06,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-11 15:11:06,078 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:06,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:06,079 INFO L82 PathProgramCache]: Analyzing trace with hash -2125654229, now seen corresponding path program 2 times [2020-11-11 15:11:06,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:06,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387599410] [2020-11-11 15:11:06,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:06,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387599410] [2020-11-11 15:11:06,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:06,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 15:11:06,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026758455] [2020-11-11 15:11:06,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 15:11:06,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:06,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 15:11:06,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-11 15:11:06,194 INFO L87 Difference]: Start difference. First operand 855 states and 2290 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:06,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:06,399 INFO L93 Difference]: Finished difference Result 1253 states and 3278 transitions. [2020-11-11 15:11:06,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 15:11:06,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2020-11-11 15:11:06,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:06,407 INFO L225 Difference]: With dead ends: 1253 [2020-11-11 15:11:06,408 INFO L226 Difference]: Without dead ends: 1029 [2020-11-11 15:11:06,408 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:06,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2020-11-11 15:11:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 899. [2020-11-11 15:11:06,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.714922048997773) internal successors, (2438), 898 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2438 transitions. [2020-11-11 15:11:06,446 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2438 transitions. Word has length 36 [2020-11-11 15:11:06,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:06,447 INFO L481 AbstractCegarLoop]: Abstraction has 899 states and 2438 transitions. [2020-11-11 15:11:06,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:06,447 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2438 transitions. [2020-11-11 15:11:06,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:11:06,449 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:06,450 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:06,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-11 15:11:06,450 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:06,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:06,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1451531371, now seen corresponding path program 3 times [2020-11-11 15:11:06,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:06,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128361605] [2020-11-11 15:11:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:06,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128361605] [2020-11-11 15:11:06,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:06,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 15:11:06,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566379535] [2020-11-11 15:11:06,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 15:11:06,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:06,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 15:11:06,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-11 15:11:06,612 INFO L87 Difference]: Start difference. First operand 899 states and 2438 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:06,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:06,767 INFO L93 Difference]: Finished difference Result 2449 states and 6632 transitions. [2020-11-11 15:11:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:11:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2020-11-11 15:11:06,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:06,784 INFO L225 Difference]: With dead ends: 2449 [2020-11-11 15:11:06,784 INFO L226 Difference]: Without dead ends: 2182 [2020-11-11 15:11:06,785 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:06,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2020-11-11 15:11:06,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1005. [2020-11-11 15:11:06,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 2.7739043824701195) internal successors, (2785), 1004 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 2785 transitions. [2020-11-11 15:11:06,845 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 2785 transitions. Word has length 36 [2020-11-11 15:11:06,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:06,846 INFO L481 AbstractCegarLoop]: Abstraction has 1005 states and 2785 transitions. [2020-11-11 15:11:06,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 2785 transitions. [2020-11-11 15:11:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:11:06,848 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:06,848 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:06,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-11 15:11:06,849 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:06,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:06,849 INFO L82 PathProgramCache]: Analyzing trace with hash 259676583, now seen corresponding path program 4 times [2020-11-11 15:11:06,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:06,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253228182] [2020-11-11 15:11:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:06,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253228182] [2020-11-11 15:11:06,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:06,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 15:11:06,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075912210] [2020-11-11 15:11:06,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 15:11:06,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:06,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 15:11:06,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-11 15:11:06,958 INFO L87 Difference]: Start difference. First operand 1005 states and 2785 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:07,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:07,126 INFO L93 Difference]: Finished difference Result 1461 states and 3937 transitions. [2020-11-11 15:11:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 15:11:07,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2020-11-11 15:11:07,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:07,134 INFO L225 Difference]: With dead ends: 1461 [2020-11-11 15:11:07,134 INFO L226 Difference]: Without dead ends: 1047 [2020-11-11 15:11:07,135 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:07,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2020-11-11 15:11:07,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 860. [2020-11-11 15:11:07,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.7427240977881255) internal successors, (2356), 859 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2356 transitions. [2020-11-11 15:11:07,165 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2356 transitions. Word has length 36 [2020-11-11 15:11:07,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:07,165 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 2356 transitions. [2020-11-11 15:11:07,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2356 transitions. [2020-11-11 15:11:07,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:11:07,167 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:07,168 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:07,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-11 15:11:07,168 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:07,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:07,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1144099044, now seen corresponding path program 1 times [2020-11-11 15:11:07,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:07,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511152710] [2020-11-11 15:11:07,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:07,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511152710] [2020-11-11 15:11:07,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604479401] [2020-11-11 15:11:07,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:07,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:11:07,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:07,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:07,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:07,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-11 15:11:07,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44053035] [2020-11-11 15:11:07,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 15:11:07,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:07,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 15:11:07,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:11:07,543 INFO L87 Difference]: Start difference. First operand 860 states and 2356 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:07,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:07,712 INFO L93 Difference]: Finished difference Result 1300 states and 3400 transitions. [2020-11-11 15:11:07,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:11:07,712 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2020-11-11 15:11:07,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:07,719 INFO L225 Difference]: With dead ends: 1300 [2020-11-11 15:11:07,719 INFO L226 Difference]: Without dead ends: 1030 [2020-11-11 15:11:07,720 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:07,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2020-11-11 15:11:07,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 947. [2020-11-11 15:11:07,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 2.712473572938689) internal successors, (2566), 946 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 2566 transitions. [2020-11-11 15:11:07,757 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 2566 transitions. Word has length 41 [2020-11-11 15:11:07,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:07,758 INFO L481 AbstractCegarLoop]: Abstraction has 947 states and 2566 transitions. [2020-11-11 15:11:07,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:07,758 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 2566 transitions. [2020-11-11 15:11:07,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:11:07,760 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:07,760 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:07,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-11 15:11:07,974 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:07,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:07,974 INFO L82 PathProgramCache]: Analyzing trace with hash 988054880, now seen corresponding path program 2 times [2020-11-11 15:11:07,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:07,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523653001] [2020-11-11 15:11:07,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:08,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523653001] [2020-11-11 15:11:08,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237966284] [2020-11-11 15:11:08,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:08,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:08,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:08,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:11:08,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:08,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:08,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:08,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:08,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-11-11 15:11:08,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926445341] [2020-11-11 15:11:08,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:11:08,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:08,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:11:08,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:08,249 INFO L87 Difference]: Start difference. First operand 947 states and 2566 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:08,437 INFO L93 Difference]: Finished difference Result 1510 states and 3900 transitions. [2020-11-11 15:11:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 15:11:08,438 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2020-11-11 15:11:08,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:08,446 INFO L225 Difference]: With dead ends: 1510 [2020-11-11 15:11:08,446 INFO L226 Difference]: Without dead ends: 1240 [2020-11-11 15:11:08,447 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:11:08,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2020-11-11 15:11:08,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1002. [2020-11-11 15:11:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 2.7382617382617385) internal successors, (2741), 1001 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 2741 transitions. [2020-11-11 15:11:08,486 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 2741 transitions. Word has length 41 [2020-11-11 15:11:08,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:08,486 INFO L481 AbstractCegarLoop]: Abstraction has 1002 states and 2741 transitions. [2020-11-11 15:11:08,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 2741 transitions. [2020-11-11 15:11:08,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:11:08,488 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:08,489 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:08,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-11 15:11:08,703 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:08,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:08,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1616846382, now seen corresponding path program 3 times [2020-11-11 15:11:08,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:08,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966860305] [2020-11-11 15:11:08,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:08,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966860305] [2020-11-11 15:11:08,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929947758] [2020-11-11 15:11:08,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:08,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 15:11:08,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:08,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:11:08,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:08,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:08,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:08,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-11 15:11:08,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812581364] [2020-11-11 15:11:08,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 15:11:08,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:08,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 15:11:08,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:11:08,936 INFO L87 Difference]: Start difference. First operand 1002 states and 2741 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:09,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:09,139 INFO L93 Difference]: Finished difference Result 2602 states and 7044 transitions. [2020-11-11 15:11:09,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 15:11:09,139 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2020-11-11 15:11:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:09,156 INFO L225 Difference]: With dead ends: 2602 [2020-11-11 15:11:09,156 INFO L226 Difference]: Without dead ends: 2332 [2020-11-11 15:11:09,157 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:11:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2020-11-11 15:11:09,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1127. [2020-11-11 15:11:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.7815275310834813) internal successors, (3132), 1126 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3132 transitions. [2020-11-11 15:11:09,234 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3132 transitions. Word has length 41 [2020-11-11 15:11:09,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:09,235 INFO L481 AbstractCegarLoop]: Abstraction has 1127 states and 3132 transitions. [2020-11-11 15:11:09,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3132 transitions. [2020-11-11 15:11:09,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:11:09,238 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:09,238 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:09,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-11 15:11:09,452 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash -966912960, now seen corresponding path program 4 times [2020-11-11 15:11:09,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:09,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104957034] [2020-11-11 15:11:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:09,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104957034] [2020-11-11 15:11:09,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022752470] [2020-11-11 15:11:09,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:09,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:09,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:09,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:09,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:09,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:09,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:09,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:09,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-11-11 15:11:09,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162667737] [2020-11-11 15:11:09,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:11:09,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:09,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:11:09,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:09,718 INFO L87 Difference]: Start difference. First operand 1127 states and 3132 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:10,068 INFO L93 Difference]: Finished difference Result 1942 states and 5130 transitions. [2020-11-11 15:11:10,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:11:10,069 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2020-11-11 15:11:10,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:10,078 INFO L225 Difference]: With dead ends: 1942 [2020-11-11 15:11:10,078 INFO L226 Difference]: Without dead ends: 1415 [2020-11-11 15:11:10,079 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:11:10,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2020-11-11 15:11:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1137. [2020-11-11 15:11:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.76056338028169) internal successors, (3136), 1136 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3136 transitions. [2020-11-11 15:11:10,119 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3136 transitions. Word has length 41 [2020-11-11 15:11:10,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:10,119 INFO L481 AbstractCegarLoop]: Abstraction has 1137 states and 3136 transitions. [2020-11-11 15:11:10,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3136 transitions. [2020-11-11 15:11:10,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-11 15:11:10,122 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:10,122 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:10,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:10,337 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:10,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:10,338 INFO L82 PathProgramCache]: Analyzing trace with hash -226684744, now seen corresponding path program 1 times [2020-11-11 15:11:10,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:10,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748409625] [2020-11-11 15:11:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:10,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748409625] [2020-11-11 15:11:10,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136671234] [2020-11-11 15:11:10,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:10,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:10,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:10,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:10,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:10,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:10,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-11-11 15:11:10,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990649093] [2020-11-11 15:11:10,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:10,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:10,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:10,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:10,647 INFO L87 Difference]: Start difference. First operand 1137 states and 3136 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:10,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:10,895 INFO L93 Difference]: Finished difference Result 2005 states and 5320 transitions. [2020-11-11 15:11:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:11:10,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2020-11-11 15:11:10,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:10,903 INFO L225 Difference]: With dead ends: 2005 [2020-11-11 15:11:10,903 INFO L226 Difference]: Without dead ends: 1671 [2020-11-11 15:11:10,904 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:11:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2020-11-11 15:11:10,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1222. [2020-11-11 15:11:10,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 2.7076167076167077) internal successors, (3306), 1221 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:10,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 3306 transitions. [2020-11-11 15:11:10,946 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 3306 transitions. Word has length 46 [2020-11-11 15:11:10,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:10,946 INFO L481 AbstractCegarLoop]: Abstraction has 1222 states and 3306 transitions. [2020-11-11 15:11:10,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:10,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 3306 transitions. [2020-11-11 15:11:10,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-11 15:11:10,949 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:10,949 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:11,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-11 15:11:11,164 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:11,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:11,165 INFO L82 PathProgramCache]: Analyzing trace with hash -359805978, now seen corresponding path program 2 times [2020-11-11 15:11:11,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:11,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082727803] [2020-11-11 15:11:11,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:11,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082727803] [2020-11-11 15:11:11,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60623086] [2020-11-11 15:11:11,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:11,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:11,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:11,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:11:11,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:11,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:11,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:11,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 15:11:11,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747427000] [2020-11-11 15:11:11,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:11:11,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:11,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:11:11,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:11,378 INFO L87 Difference]: Start difference. First operand 1222 states and 3306 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:11,571 INFO L93 Difference]: Finished difference Result 1870 states and 4730 transitions. [2020-11-11 15:11:11,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 15:11:11,572 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2020-11-11 15:11:11,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:11,577 INFO L225 Difference]: With dead ends: 1870 [2020-11-11 15:11:11,578 INFO L226 Difference]: Without dead ends: 1600 [2020-11-11 15:11:11,578 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:11:11,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2020-11-11 15:11:11,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1237. [2020-11-11 15:11:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 2.6990291262135924) internal successors, (3336), 1236 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 3336 transitions. [2020-11-11 15:11:11,619 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 3336 transitions. Word has length 46 [2020-11-11 15:11:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:11,620 INFO L481 AbstractCegarLoop]: Abstraction has 1237 states and 3336 transitions. [2020-11-11 15:11:11,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 3336 transitions. [2020-11-11 15:11:11,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-11 15:11:11,622 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:11,623 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:11,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:11,837 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:11,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:11,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1471726806, now seen corresponding path program 3 times [2020-11-11 15:11:11,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:11,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821302229] [2020-11-11 15:11:11,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:11,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821302229] [2020-11-11 15:11:11,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134779636] [2020-11-11 15:11:11,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:12,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 15:11:12,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:12,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:11:12,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:12,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:12,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:12,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:12,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-11-11 15:11:12,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375255439] [2020-11-11 15:11:12,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:12,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:12,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:12,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:12,131 INFO L87 Difference]: Start difference. First operand 1237 states and 3336 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:12,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:12,388 INFO L93 Difference]: Finished difference Result 1800 states and 4610 transitions. [2020-11-11 15:11:12,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:11:12,389 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2020-11-11 15:11:12,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:12,393 INFO L225 Difference]: With dead ends: 1800 [2020-11-11 15:11:12,394 INFO L226 Difference]: Without dead ends: 1530 [2020-11-11 15:11:12,396 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:11:12,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2020-11-11 15:11:12,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1237. [2020-11-11 15:11:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 2.703074433656958) internal successors, (3341), 1236 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:12,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 3341 transitions. [2020-11-11 15:11:12,433 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 3341 transitions. Word has length 46 [2020-11-11 15:11:12,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:12,433 INFO L481 AbstractCegarLoop]: Abstraction has 1237 states and 3341 transitions. [2020-11-11 15:11:12,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:12,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 3341 transitions. [2020-11-11 15:11:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-11 15:11:12,436 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:12,436 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:12,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-11 15:11:12,653 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:12,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:12,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2100518308, now seen corresponding path program 4 times [2020-11-11 15:11:12,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:12,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259639511] [2020-11-11 15:11:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:12,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259639511] [2020-11-11 15:11:12,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843468289] [2020-11-11 15:11:12,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:12,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:12,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:12,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:12,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:12,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:12,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:12,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 15:11:12,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954988697] [2020-11-11 15:11:12,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:11:12,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:11:12,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:12,858 INFO L87 Difference]: Start difference. First operand 1237 states and 3341 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:13,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:13,052 INFO L93 Difference]: Finished difference Result 2912 states and 7794 transitions. [2020-11-11 15:11:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 15:11:13,053 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2020-11-11 15:11:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:13,060 INFO L225 Difference]: With dead ends: 2912 [2020-11-11 15:11:13,061 INFO L226 Difference]: Without dead ends: 2642 [2020-11-11 15:11:13,061 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:11:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2020-11-11 15:11:13,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1362. [2020-11-11 15:11:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 2.742101396032329) internal successors, (3732), 1361 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 3732 transitions. [2020-11-11 15:11:13,138 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 3732 transitions. Word has length 46 [2020-11-11 15:11:13,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:13,139 INFO L481 AbstractCegarLoop]: Abstraction has 1362 states and 3732 transitions. [2020-11-11 15:11:13,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:13,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 3732 transitions. [2020-11-11 15:11:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-11 15:11:13,142 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:13,142 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:13,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-11 15:11:13,356 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:13,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:13,357 INFO L82 PathProgramCache]: Analyzing trace with hash -483241034, now seen corresponding path program 5 times [2020-11-11 15:11:13,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:13,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442138230] [2020-11-11 15:11:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:13,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442138230] [2020-11-11 15:11:13,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776362919] [2020-11-11 15:11:13,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:13,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 15:11:13,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:13,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:11:13,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:13,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:13,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:13,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:13,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 15:11:13,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866533766] [2020-11-11 15:11:13,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:11:13,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:13,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:11:13,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:13,574 INFO L87 Difference]: Start difference. First operand 1362 states and 3732 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:13,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:13,920 INFO L93 Difference]: Finished difference Result 1951 states and 5150 transitions. [2020-11-11 15:11:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 15:11:13,921 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2020-11-11 15:11:13,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:13,925 INFO L225 Difference]: With dead ends: 1951 [2020-11-11 15:11:13,926 INFO L226 Difference]: Without dead ends: 1480 [2020-11-11 15:11:13,926 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:11:13,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2020-11-11 15:11:13,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1152. [2020-11-11 15:11:13,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 2.7158992180712422) internal successors, (3126), 1151 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 3126 transitions. [2020-11-11 15:11:13,971 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 3126 transitions. Word has length 46 [2020-11-11 15:11:13,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:13,971 INFO L481 AbstractCegarLoop]: Abstraction has 1152 states and 3126 transitions. [2020-11-11 15:11:13,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:13,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 3126 transitions. [2020-11-11 15:11:13,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:13,974 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:13,974 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:14,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-11 15:11:14,188 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:14,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:14,189 INFO L82 PathProgramCache]: Analyzing trace with hash -935339201, now seen corresponding path program 6 times [2020-11-11 15:11:14,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:14,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392462309] [2020-11-11 15:11:14,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:14,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392462309] [2020-11-11 15:11:14,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636534453] [2020-11-11 15:11:14,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:14,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 15:11:14,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:14,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:14,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:14,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:14,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:14,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 15:11:14,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582571289] [2020-11-11 15:11:14,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:14,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:14,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:14,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:14,448 INFO L87 Difference]: Start difference. First operand 1152 states and 3126 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:14,691 INFO L93 Difference]: Finished difference Result 1745 states and 4490 transitions. [2020-11-11 15:11:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:11:14,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2020-11-11 15:11:14,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:14,701 INFO L225 Difference]: With dead ends: 1745 [2020-11-11 15:11:14,701 INFO L226 Difference]: Without dead ends: 1475 [2020-11-11 15:11:14,702 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:11:14,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2020-11-11 15:11:14,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1202. [2020-11-11 15:11:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 2.7277268942547876) internal successors, (3276), 1201 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:14,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 3276 transitions. [2020-11-11 15:11:14,743 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 3276 transitions. Word has length 51 [2020-11-11 15:11:14,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:14,743 INFO L481 AbstractCegarLoop]: Abstraction has 1202 states and 3276 transitions. [2020-11-11 15:11:14,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:14,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 3276 transitions. [2020-11-11 15:11:14,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:14,746 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:14,746 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:14,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-11 15:11:14,961 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:14,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:14,962 INFO L82 PathProgramCache]: Analyzing trace with hash 896193583, now seen corresponding path program 7 times [2020-11-11 15:11:14,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:14,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108678243] [2020-11-11 15:11:14,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:15,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108678243] [2020-11-11 15:11:15,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104783957] [2020-11-11 15:11:15,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:15,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:15,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:15,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:15,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:15,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:15,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-11-11 15:11:15,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350133181] [2020-11-11 15:11:15,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:11:15,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:15,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:11:15,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:15,216 INFO L87 Difference]: Start difference. First operand 1202 states and 3276 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:15,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:15,514 INFO L93 Difference]: Finished difference Result 1885 states and 4850 transitions. [2020-11-11 15:11:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:11:15,515 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2020-11-11 15:11:15,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:15,519 INFO L225 Difference]: With dead ends: 1885 [2020-11-11 15:11:15,519 INFO L226 Difference]: Without dead ends: 1615 [2020-11-11 15:11:15,520 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:11:15,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2020-11-11 15:11:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1252. [2020-11-11 15:11:15,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 2.7505995203836933) internal successors, (3441), 1251 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 3441 transitions. [2020-11-11 15:11:15,558 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 3441 transitions. Word has length 51 [2020-11-11 15:11:15,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:15,559 INFO L481 AbstractCegarLoop]: Abstraction has 1252 states and 3441 transitions. [2020-11-11 15:11:15,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:15,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 3441 transitions. [2020-11-11 15:11:15,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:15,562 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:15,562 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:15,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:15,777 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:15,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:15,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1524985085, now seen corresponding path program 8 times [2020-11-11 15:11:15,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:15,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346792430] [2020-11-11 15:11:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:15,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346792430] [2020-11-11 15:11:15,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485467265] [2020-11-11 15:11:15,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:15,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:15,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:15,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:15,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:15,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:15,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:15,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 15:11:15,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604437627] [2020-11-11 15:11:15,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:15,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:15,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:15,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:15,977 INFO L87 Difference]: Start difference. First operand 1252 states and 3441 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:16,277 INFO L93 Difference]: Finished difference Result 2952 states and 7944 transitions. [2020-11-11 15:11:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:11:16,277 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2020-11-11 15:11:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:16,287 INFO L225 Difference]: With dead ends: 2952 [2020-11-11 15:11:16,288 INFO L226 Difference]: Without dead ends: 2682 [2020-11-11 15:11:16,288 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:11:16,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2020-11-11 15:11:16,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1377. [2020-11-11 15:11:16,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 2.7848837209302326) internal successors, (3832), 1376 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:16,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 3832 transitions. [2020-11-11 15:11:16,351 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 3832 transitions. Word has length 51 [2020-11-11 15:11:16,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:16,352 INFO L481 AbstractCegarLoop]: Abstraction has 1377 states and 3832 transitions. [2020-11-11 15:11:16,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:16,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 3832 transitions. [2020-11-11 15:11:16,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:16,354 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:16,355 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:16,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:16,569 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:16,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:16,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1058774257, now seen corresponding path program 9 times [2020-11-11 15:11:16,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:16,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557759475] [2020-11-11 15:11:16,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:16,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557759475] [2020-11-11 15:11:16,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386272152] [2020-11-11 15:11:16,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:16,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 15:11:16,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:16,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:16,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:16,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:16,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:16,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:16,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-11-11 15:11:16,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530543720] [2020-11-11 15:11:16,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:11:16,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:16,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:11:16,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:16,806 INFO L87 Difference]: Start difference. First operand 1377 states and 3832 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:17,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:17,244 INFO L93 Difference]: Finished difference Result 2347 states and 6190 transitions. [2020-11-11 15:11:17,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:11:17,245 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2020-11-11 15:11:17,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:17,250 INFO L225 Difference]: With dead ends: 2347 [2020-11-11 15:11:17,250 INFO L226 Difference]: Without dead ends: 1820 [2020-11-11 15:11:17,251 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:11:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2020-11-11 15:11:17,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1387. [2020-11-11 15:11:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1386 states have (on average 2.7676767676767677) internal successors, (3836), 1386 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 3836 transitions. [2020-11-11 15:11:17,291 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 3836 transitions. Word has length 51 [2020-11-11 15:11:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:17,291 INFO L481 AbstractCegarLoop]: Abstraction has 1387 states and 3836 transitions. [2020-11-11 15:11:17,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 3836 transitions. [2020-11-11 15:11:17,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:17,294 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:17,294 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:17,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-11 15:11:17,510 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:17,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:17,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1906333367, now seen corresponding path program 10 times [2020-11-11 15:11:17,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:17,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777805425] [2020-11-11 15:11:17,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:17,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777805425] [2020-11-11 15:11:17,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450913529] [2020-11-11 15:11:17,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:17,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:17,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:17,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:17,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:17,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:17,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:17,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:17,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-11 15:11:17,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407357822] [2020-11-11 15:11:17,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:17,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:17,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:17,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:17,760 INFO L87 Difference]: Start difference. First operand 1387 states and 3836 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:18,020 INFO L93 Difference]: Finished difference Result 2305 states and 6120 transitions. [2020-11-11 15:11:18,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:11:18,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-11 15:11:18,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:18,026 INFO L225 Difference]: With dead ends: 2305 [2020-11-11 15:11:18,026 INFO L226 Difference]: Without dead ends: 1971 [2020-11-11 15:11:18,027 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:11:18,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2020-11-11 15:11:18,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1472. [2020-11-11 15:11:18,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.7233174711080896) internal successors, (4006), 1471 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:18,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 4006 transitions. [2020-11-11 15:11:18,078 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 4006 transitions. Word has length 56 [2020-11-11 15:11:18,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:18,078 INFO L481 AbstractCegarLoop]: Abstraction has 1472 states and 4006 transitions. [2020-11-11 15:11:18,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:18,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 4006 transitions. [2020-11-11 15:11:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:18,083 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:18,083 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:18,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:18,299 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:18,300 INFO L82 PathProgramCache]: Analyzing trace with hash -2112175369, now seen corresponding path program 11 times [2020-11-11 15:11:18,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:18,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429486346] [2020-11-11 15:11:18,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:18,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429486346] [2020-11-11 15:11:18,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141390319] [2020-11-11 15:11:18,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:18,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 15:11:18,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:18,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:18,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:18,514 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:18,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:18,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-11 15:11:18,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669117194] [2020-11-11 15:11:18,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:18,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:18,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:18,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:18,524 INFO L87 Difference]: Start difference. First operand 1472 states and 4006 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:18,719 INFO L93 Difference]: Finished difference Result 2270 states and 5730 transitions. [2020-11-11 15:11:18,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 15:11:18,719 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-11 15:11:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:18,726 INFO L225 Difference]: With dead ends: 2270 [2020-11-11 15:11:18,726 INFO L226 Difference]: Without dead ends: 2000 [2020-11-11 15:11:18,727 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:11:18,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2020-11-11 15:11:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1487. [2020-11-11 15:11:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.7160161507402423) internal successors, (4036), 1486 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4036 transitions. [2020-11-11 15:11:18,762 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4036 transitions. Word has length 56 [2020-11-11 15:11:18,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:18,763 INFO L481 AbstractCegarLoop]: Abstraction has 1487 states and 4036 transitions. [2020-11-11 15:11:18,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:18,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4036 transitions. [2020-11-11 15:11:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:18,766 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:18,766 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:18,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-11 15:11:18,981 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:18,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:18,982 INFO L82 PathProgramCache]: Analyzing trace with hash 643256295, now seen corresponding path program 12 times [2020-11-11 15:11:18,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:18,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027114616] [2020-11-11 15:11:18,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:19,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027114616] [2020-11-11 15:11:19,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852044164] [2020-11-11 15:11:19,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:19,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 15:11:19,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:19,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:19,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:19,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:19,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:19,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:19,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 15:11:19,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351167744] [2020-11-11 15:11:19,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:11:19,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:19,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:11:19,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:19,228 INFO L87 Difference]: Start difference. First operand 1487 states and 4036 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:19,537 INFO L93 Difference]: Finished difference Result 2155 states and 5500 transitions. [2020-11-11 15:11:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:11:19,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-11 15:11:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:19,543 INFO L225 Difference]: With dead ends: 2155 [2020-11-11 15:11:19,543 INFO L226 Difference]: Without dead ends: 1885 [2020-11-11 15:11:19,544 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:11:19,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2020-11-11 15:11:19,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1487. [2020-11-11 15:11:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.7160161507402423) internal successors, (4036), 1486 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:19,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4036 transitions. [2020-11-11 15:11:19,582 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4036 transitions. Word has length 56 [2020-11-11 15:11:19,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:19,583 INFO L481 AbstractCegarLoop]: Abstraction has 1487 states and 4036 transitions. [2020-11-11 15:11:19,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:19,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4036 transitions. [2020-11-11 15:11:19,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:19,586 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:19,586 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:19,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:19,800 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:19,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:19,801 INFO L82 PathProgramCache]: Analyzing trace with hash -713310411, now seen corresponding path program 13 times [2020-11-11 15:11:19,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:19,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219863037] [2020-11-11 15:11:19,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:19,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219863037] [2020-11-11 15:11:19,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047068114] [2020-11-11 15:11:19,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:19,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:19,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:20,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:20,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:20,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-11 15:11:20,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597137407] [2020-11-11 15:11:20,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:20,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:20,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:20,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:20,010 INFO L87 Difference]: Start difference. First operand 1487 states and 4036 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:20,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:20,256 INFO L93 Difference]: Finished difference Result 2130 states and 5450 transitions. [2020-11-11 15:11:20,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 15:11:20,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-11 15:11:20,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:20,261 INFO L225 Difference]: With dead ends: 2130 [2020-11-11 15:11:20,262 INFO L226 Difference]: Without dead ends: 1860 [2020-11-11 15:11:20,262 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:11:20,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2020-11-11 15:11:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1487. [2020-11-11 15:11:20,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.7160161507402423) internal successors, (4036), 1486 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:20,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4036 transitions. [2020-11-11 15:11:20,297 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4036 transitions. Word has length 56 [2020-11-11 15:11:20,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:20,297 INFO L481 AbstractCegarLoop]: Abstraction has 1487 states and 4036 transitions. [2020-11-11 15:11:20,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:20,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4036 transitions. [2020-11-11 15:11:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:20,300 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:20,301 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:20,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-11 15:11:20,512 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:20,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:20,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1118222373, now seen corresponding path program 14 times [2020-11-11 15:11:20,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:20,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126409370] [2020-11-11 15:11:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:20,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126409370] [2020-11-11 15:11:20,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223235834] [2020-11-11 15:11:20,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:20,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:20,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:20,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:20,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:20,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:20,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:20,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:20,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 15:11:20,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357993987] [2020-11-11 15:11:20,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:11:20,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:20,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:11:20,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:20,809 INFO L87 Difference]: Start difference. First operand 1487 states and 4036 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:21,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:21,194 INFO L93 Difference]: Finished difference Result 2125 states and 5460 transitions. [2020-11-11 15:11:21,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:11:21,197 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-11 15:11:21,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:21,202 INFO L225 Difference]: With dead ends: 2125 [2020-11-11 15:11:21,202 INFO L226 Difference]: Without dead ends: 1855 [2020-11-11 15:11:21,203 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:11:21,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2020-11-11 15:11:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1487. [2020-11-11 15:11:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.719380888290713) internal successors, (4041), 1486 states have internal predecessors, (4041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:21,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4041 transitions. [2020-11-11 15:11:21,237 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4041 transitions. Word has length 56 [2020-11-11 15:11:21,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:21,237 INFO L481 AbstractCegarLoop]: Abstraction has 1487 states and 4041 transitions. [2020-11-11 15:11:21,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:21,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4041 transitions. [2020-11-11 15:11:21,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:21,240 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:21,241 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:21,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-11 15:11:21,455 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:21,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:21,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1747013875, now seen corresponding path program 15 times [2020-11-11 15:11:21,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:21,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147099901] [2020-11-11 15:11:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:21,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147099901] [2020-11-11 15:11:21,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405718160] [2020-11-11 15:11:21,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:21,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 15:11:21,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:21,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:21,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:21,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:21,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:21,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-11 15:11:21,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048584146] [2020-11-11 15:11:21,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:21,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:21,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:21,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:21,702 INFO L87 Difference]: Start difference. First operand 1487 states and 4041 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:22,034 INFO L93 Difference]: Finished difference Result 3212 states and 8594 transitions. [2020-11-11 15:11:22,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:11:22,035 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-11 15:11:22,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:22,041 INFO L225 Difference]: With dead ends: 3212 [2020-11-11 15:11:22,041 INFO L226 Difference]: Without dead ends: 2942 [2020-11-11 15:11:22,042 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:11:22,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2020-11-11 15:11:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 1612. [2020-11-11 15:11:22,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 2.751086281812539) internal successors, (4432), 1611 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:22,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 4432 transitions. [2020-11-11 15:11:22,093 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 4432 transitions. Word has length 56 [2020-11-11 15:11:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:22,093 INFO L481 AbstractCegarLoop]: Abstraction has 1612 states and 4432 transitions. [2020-11-11 15:11:22,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 4432 transitions. [2020-11-11 15:11:22,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:22,097 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:22,097 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:22,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-11 15:11:22,312 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:22,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:22,313 INFO L82 PathProgramCache]: Analyzing trace with hash -836745467, now seen corresponding path program 16 times [2020-11-11 15:11:22,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:22,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501812324] [2020-11-11 15:11:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:22,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501812324] [2020-11-11 15:11:22,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843945706] [2020-11-11 15:11:22,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:22,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:22,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:22,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:22,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:22,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:22,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:22,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:22,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-11-11 15:11:22,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784872573] [2020-11-11 15:11:22,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:22,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:22,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:22,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:22,555 INFO L87 Difference]: Start difference. First operand 1612 states and 4432 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:23,081 INFO L93 Difference]: Finished difference Result 2587 states and 6750 transitions. [2020-11-11 15:11:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:11:23,081 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-11 15:11:23,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:23,086 INFO L225 Difference]: With dead ends: 2587 [2020-11-11 15:11:23,086 INFO L226 Difference]: Without dead ends: 2060 [2020-11-11 15:11:23,087 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2020-11-11 15:11:23,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2020-11-11 15:11:23,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1362. [2020-11-11 15:11:23,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 2.700955180014695) internal successors, (3676), 1361 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:23,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 3676 transitions. [2020-11-11 15:11:23,121 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 3676 transitions. Word has length 56 [2020-11-11 15:11:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:23,122 INFO L481 AbstractCegarLoop]: Abstraction has 1362 states and 3676 transitions. [2020-11-11 15:11:23,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:23,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 3676 transitions. [2020-11-11 15:11:23,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:23,125 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:23,125 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:23,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-11 15:11:23,338 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:23,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:23,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1823983856, now seen corresponding path program 17 times [2020-11-11 15:11:23,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:23,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843017908] [2020-11-11 15:11:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:23,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843017908] [2020-11-11 15:11:23,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275278553] [2020-11-11 15:11:23,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:23,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 15:11:23,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:23,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:23,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:23,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:23,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:23,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 15:11:23,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413826999] [2020-11-11 15:11:23,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:23,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:23,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:23,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:23,573 INFO L87 Difference]: Start difference. First operand 1362 states and 3676 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:23,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:23,858 INFO L93 Difference]: Finished difference Result 2055 states and 5240 transitions. [2020-11-11 15:11:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:11:23,859 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-11-11 15:11:23,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:23,862 INFO L225 Difference]: With dead ends: 2055 [2020-11-11 15:11:23,862 INFO L226 Difference]: Without dead ends: 1785 [2020-11-11 15:11:23,862 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:11:23,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2020-11-11 15:11:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1412. [2020-11-11 15:11:23,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 2.7115520907158044) internal successors, (3826), 1411 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 3826 transitions. [2020-11-11 15:11:23,895 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 3826 transitions. Word has length 61 [2020-11-11 15:11:23,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:23,895 INFO L481 AbstractCegarLoop]: Abstraction has 1412 states and 3826 transitions. [2020-11-11 15:11:23,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 3826 transitions. [2020-11-11 15:11:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:23,899 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:23,900 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:24,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-11 15:11:24,116 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:24,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:24,116 INFO L82 PathProgramCache]: Analyzing trace with hash 931447808, now seen corresponding path program 18 times [2020-11-11 15:11:24,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:24,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778441446] [2020-11-11 15:11:24,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:24,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778441446] [2020-11-11 15:11:24,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918885051] [2020-11-11 15:11:24,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:24,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 15:11:24,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:24,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:24,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:24,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:24,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:24,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:24,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-11 15:11:24,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748343802] [2020-11-11 15:11:24,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:24,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:24,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:24,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:24,374 INFO L87 Difference]: Start difference. First operand 1412 states and 3826 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:24,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:24,703 INFO L93 Difference]: Finished difference Result 2200 states and 5580 transitions. [2020-11-11 15:11:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:11:24,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-11-11 15:11:24,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:24,706 INFO L225 Difference]: With dead ends: 2200 [2020-11-11 15:11:24,707 INFO L226 Difference]: Without dead ends: 1930 [2020-11-11 15:11:24,707 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:11:24,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-11-11 15:11:24,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1462. [2020-11-11 15:11:24,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 2.7214236824093088) internal successors, (3976), 1461 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 3976 transitions. [2020-11-11 15:11:24,768 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 3976 transitions. Word has length 61 [2020-11-11 15:11:24,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:24,769 INFO L481 AbstractCegarLoop]: Abstraction has 1462 states and 3976 transitions. [2020-11-11 15:11:24,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:24,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 3976 transitions. [2020-11-11 15:11:24,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:24,772 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:24,772 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:24,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:24,987 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:24,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:24,987 INFO L82 PathProgramCache]: Analyzing trace with hash -425118898, now seen corresponding path program 19 times [2020-11-11 15:11:24,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:24,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850423477] [2020-11-11 15:11:24,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:25,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850423477] [2020-11-11 15:11:25,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797646477] [2020-11-11 15:11:25,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:25,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:25,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:25,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:25,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:25,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 15:11:25,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112703652] [2020-11-11 15:11:25,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:25,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:25,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:25,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:25,203 INFO L87 Difference]: Start difference. First operand 1462 states and 3976 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:25,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:25,529 INFO L93 Difference]: Finished difference Result 2235 states and 5715 transitions. [2020-11-11 15:11:25,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:11:25,530 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-11-11 15:11:25,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:25,532 INFO L225 Difference]: With dead ends: 2235 [2020-11-11 15:11:25,532 INFO L226 Difference]: Without dead ends: 1965 [2020-11-11 15:11:25,533 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:11:25,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2020-11-11 15:11:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1512. [2020-11-11 15:11:25,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 2.7372600926538717) internal successors, (4136), 1511 states have internal predecessors, (4136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 4136 transitions. [2020-11-11 15:11:25,578 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 4136 transitions. Word has length 61 [2020-11-11 15:11:25,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:25,578 INFO L481 AbstractCegarLoop]: Abstraction has 1512 states and 4136 transitions. [2020-11-11 15:11:25,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 4136 transitions. [2020-11-11 15:11:25,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:25,584 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:25,585 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:25,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-11 15:11:25,799 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:25,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:25,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1406413886, now seen corresponding path program 20 times [2020-11-11 15:11:25,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:25,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666390981] [2020-11-11 15:11:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:25,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666390981] [2020-11-11 15:11:25,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926719187] [2020-11-11 15:11:25,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:25,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:25,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:25,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:25,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:26,016 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:26,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:26,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:26,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-11 15:11:26,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160430856] [2020-11-11 15:11:26,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:26,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:26,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:26,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:26,050 INFO L87 Difference]: Start difference. First operand 1512 states and 4136 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:26,577 INFO L93 Difference]: Finished difference Result 2694 states and 6984 transitions. [2020-11-11 15:11:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:11:26,577 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-11-11 15:11:26,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:26,580 INFO L225 Difference]: With dead ends: 2694 [2020-11-11 15:11:26,581 INFO L226 Difference]: Without dead ends: 2125 [2020-11-11 15:11:26,581 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2020-11-11 15:11:26,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2020-11-11 15:11:26,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1562. [2020-11-11 15:11:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.7488789237668163) internal successors, (4291), 1561 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:26,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4291 transitions. [2020-11-11 15:11:26,617 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4291 transitions. Word has length 61 [2020-11-11 15:11:26,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:26,617 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4291 transitions. [2020-11-11 15:11:26,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:26,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4291 transitions. [2020-11-11 15:11:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:26,620 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:26,621 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:26,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:26,835 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:26,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:26,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2035205388, now seen corresponding path program 21 times [2020-11-11 15:11:26,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:26,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66854549] [2020-11-11 15:11:26,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:26,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66854549] [2020-11-11 15:11:26,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196747746] [2020-11-11 15:11:26,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:27,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 15:11:27,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:27,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:27,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:27,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:27,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:27,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 15:11:27,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147888712] [2020-11-11 15:11:27,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:27,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:27,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:27,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:27,082 INFO L87 Difference]: Start difference. First operand 1562 states and 4291 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:27,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:27,396 INFO L93 Difference]: Finished difference Result 3312 states and 8894 transitions. [2020-11-11 15:11:27,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:11:27,397 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-11-11 15:11:27,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:27,401 INFO L225 Difference]: With dead ends: 3312 [2020-11-11 15:11:27,402 INFO L226 Difference]: Without dead ends: 3042 [2020-11-11 15:11:27,403 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:11:27,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2020-11-11 15:11:27,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 1687. [2020-11-11 15:11:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 2.7769869513641754) internal successors, (4682), 1686 states have internal predecessors, (4682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 4682 transitions. [2020-11-11 15:11:27,452 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 4682 transitions. Word has length 61 [2020-11-11 15:11:27,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:27,452 INFO L481 AbstractCegarLoop]: Abstraction has 1687 states and 4682 transitions. [2020-11-11 15:11:27,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:27,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 4682 transitions. [2020-11-11 15:11:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:27,454 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:27,455 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:27,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-11 15:11:27,655 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:27,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:27,656 INFO L82 PathProgramCache]: Analyzing trace with hash -548553954, now seen corresponding path program 22 times [2020-11-11 15:11:27,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:27,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494315276] [2020-11-11 15:11:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:27,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494315276] [2020-11-11 15:11:27,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406287677] [2020-11-11 15:11:27,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:27,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:27,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:27,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:27,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:27,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:27,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:27,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:27,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 15:11:27,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257704103] [2020-11-11 15:11:27,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:27,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:27,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:27,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:27,873 INFO L87 Difference]: Start difference. First operand 1687 states and 4682 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:28,371 INFO L93 Difference]: Finished difference Result 2326 states and 6200 transitions. [2020-11-11 15:11:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:11:28,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-11-11 15:11:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:28,375 INFO L225 Difference]: With dead ends: 2326 [2020-11-11 15:11:28,375 INFO L226 Difference]: Without dead ends: 1915 [2020-11-11 15:11:28,376 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:11:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2020-11-11 15:11:28,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1637. [2020-11-11 15:11:28,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 2.772616136919315) internal successors, (4536), 1636 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:28,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 4536 transitions. [2020-11-11 15:11:28,414 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 4536 transitions. Word has length 61 [2020-11-11 15:11:28,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:28,414 INFO L481 AbstractCegarLoop]: Abstraction has 1637 states and 4536 transitions. [2020-11-11 15:11:28,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:28,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 4536 transitions. [2020-11-11 15:11:28,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:28,417 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:28,417 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:28,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-11 15:11:28,631 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:28,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:28,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1466794138, now seen corresponding path program 23 times [2020-11-11 15:11:28,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:28,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931921686] [2020-11-11 15:11:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:28,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931921686] [2020-11-11 15:11:28,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007578986] [2020-11-11 15:11:28,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:28,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 15:11:28,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:28,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:28,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:28,951 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:28,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:28,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:28,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2020-11-11 15:11:28,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444718452] [2020-11-11 15:11:28,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:11:28,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:28,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:11:28,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:11:28,998 INFO L87 Difference]: Start difference. First operand 1637 states and 4536 transitions. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:29,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:29,383 INFO L93 Difference]: Finished difference Result 2605 states and 6920 transitions. [2020-11-11 15:11:29,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:11:29,384 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:11:29,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:29,388 INFO L225 Difference]: With dead ends: 2605 [2020-11-11 15:11:29,388 INFO L226 Difference]: Without dead ends: 2271 [2020-11-11 15:11:29,389 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:11:29,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2020-11-11 15:11:29,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1722. [2020-11-11 15:11:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 2.7344567112144103) internal successors, (4706), 1721 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:29,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 4706 transitions. [2020-11-11 15:11:29,435 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 4706 transitions. Word has length 66 [2020-11-11 15:11:29,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:29,436 INFO L481 AbstractCegarLoop]: Abstraction has 1722 states and 4706 transitions. [2020-11-11 15:11:29,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:29,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 4706 transitions. [2020-11-11 15:11:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:29,439 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:29,439 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:29,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-11 15:11:29,654 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:29,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:29,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1504782136, now seen corresponding path program 24 times [2020-11-11 15:11:29,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:29,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583575190] [2020-11-11 15:11:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:29,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583575190] [2020-11-11 15:11:29,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311152697] [2020-11-11 15:11:29,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:29,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 15:11:29,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:29,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:29,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:29,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:29,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:29,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:11:29,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446689640] [2020-11-11 15:11:29,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:29,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:29,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:29,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:29,911 INFO L87 Difference]: Start difference. First operand 1722 states and 4706 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:30,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:30,150 INFO L93 Difference]: Finished difference Result 2670 states and 6730 transitions. [2020-11-11 15:11:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:11:30,151 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:11:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:30,155 INFO L225 Difference]: With dead ends: 2670 [2020-11-11 15:11:30,155 INFO L226 Difference]: Without dead ends: 2400 [2020-11-11 15:11:30,156 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:11:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2020-11-11 15:11:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1737. [2020-11-11 15:11:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.728110599078341) internal successors, (4736), 1736 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:30,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4736 transitions. [2020-11-11 15:11:30,199 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4736 transitions. Word has length 66 [2020-11-11 15:11:30,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:30,199 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4736 transitions. [2020-11-11 15:11:30,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:30,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4736 transitions. [2020-11-11 15:11:30,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:30,203 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:30,203 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:30,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-11 15:11:30,414 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:30,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:30,414 INFO L82 PathProgramCache]: Analyzing trace with hash -676070984, now seen corresponding path program 25 times [2020-11-11 15:11:30,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:30,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905576584] [2020-11-11 15:11:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:30,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905576584] [2020-11-11 15:11:30,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818460145] [2020-11-11 15:11:30,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:30,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:30,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:30,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:30,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:30,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:30,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-11 15:11:30,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621735958] [2020-11-11 15:11:30,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:30,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:30,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:30,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:30,699 INFO L87 Difference]: Start difference. First operand 1737 states and 4736 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:31,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:31,040 INFO L93 Difference]: Finished difference Result 2555 states and 6500 transitions. [2020-11-11 15:11:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:11:31,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:11:31,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:31,046 INFO L225 Difference]: With dead ends: 2555 [2020-11-11 15:11:31,046 INFO L226 Difference]: Without dead ends: 2285 [2020-11-11 15:11:31,047 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:11:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2020-11-11 15:11:31,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1737. [2020-11-11 15:11:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.728110599078341) internal successors, (4736), 1736 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:31,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4736 transitions. [2020-11-11 15:11:31,112 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4736 transitions. Word has length 66 [2020-11-11 15:11:31,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:31,112 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4736 transitions. [2020-11-11 15:11:31,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:31,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4736 transitions. [2020-11-11 15:11:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:31,117 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:31,117 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:31,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-11 15:11:31,332 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:31,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:31,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1896357766, now seen corresponding path program 26 times [2020-11-11 15:11:31,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:31,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917826175] [2020-11-11 15:11:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:31,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917826175] [2020-11-11 15:11:31,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553208924] [2020-11-11 15:11:31,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:31,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:31,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:31,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:31,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:31,571 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:31,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:31,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:11:31,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417604302] [2020-11-11 15:11:31,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:31,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:31,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:31,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:31,581 INFO L87 Difference]: Start difference. First operand 1737 states and 4736 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:31,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:31,902 INFO L93 Difference]: Finished difference Result 2530 states and 6450 transitions. [2020-11-11 15:11:31,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:11:31,902 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:11:31,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:31,905 INFO L225 Difference]: With dead ends: 2530 [2020-11-11 15:11:31,905 INFO L226 Difference]: Without dead ends: 2260 [2020-11-11 15:11:31,906 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:11:31,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2020-11-11 15:11:31,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1737. [2020-11-11 15:11:31,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.728110599078341) internal successors, (4736), 1736 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4736 transitions. [2020-11-11 15:11:31,944 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4736 transitions. Word has length 66 [2020-11-11 15:11:31,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:31,945 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4736 transitions. [2020-11-11 15:11:31,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4736 transitions. [2020-11-11 15:11:31,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:31,948 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:31,948 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:32,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:32,164 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:32,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:32,164 INFO L82 PathProgramCache]: Analyzing trace with hash 356822134, now seen corresponding path program 27 times [2020-11-11 15:11:32,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:32,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188543678] [2020-11-11 15:11:32,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:32,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188543678] [2020-11-11 15:11:32,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000821195] [2020-11-11 15:11:32,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:32,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 15:11:32,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:32,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:32,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:32,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:32,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:32,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:32,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-11 15:11:32,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678476636] [2020-11-11 15:11:32,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:32,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:32,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:32,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:32,465 INFO L87 Difference]: Start difference. First operand 1737 states and 4736 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:32,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:32,914 INFO L93 Difference]: Finished difference Result 2480 states and 6350 transitions. [2020-11-11 15:11:32,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:11:32,915 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:11:32,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:32,917 INFO L225 Difference]: With dead ends: 2480 [2020-11-11 15:11:32,918 INFO L226 Difference]: Without dead ends: 2210 [2020-11-11 15:11:32,918 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:11:32,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2020-11-11 15:11:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1737. [2020-11-11 15:11:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.728110599078341) internal successors, (4736), 1736 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4736 transitions. [2020-11-11 15:11:32,945 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4736 transitions. Word has length 66 [2020-11-11 15:11:32,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:32,946 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4736 transitions. [2020-11-11 15:11:32,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:32,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4736 transitions. [2020-11-11 15:11:32,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:32,949 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:32,949 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:33,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-11 15:11:33,163 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:33,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:33,163 INFO L82 PathProgramCache]: Analyzing trace with hash -999744572, now seen corresponding path program 28 times [2020-11-11 15:11:33,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:33,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046957297] [2020-11-11 15:11:33,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:33,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046957297] [2020-11-11 15:11:33,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574271591] [2020-11-11 15:11:33,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:33,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:33,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:33,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:33,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:33,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:33,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:33,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:11:33,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386951272] [2020-11-11 15:11:33,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:33,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:33,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:33,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:33,417 INFO L87 Difference]: Start difference. First operand 1737 states and 4736 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:33,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:33,799 INFO L93 Difference]: Finished difference Result 2430 states and 6250 transitions. [2020-11-11 15:11:33,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:11:33,799 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:11:33,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:33,802 INFO L225 Difference]: With dead ends: 2430 [2020-11-11 15:11:33,802 INFO L226 Difference]: Without dead ends: 2160 [2020-11-11 15:11:33,803 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:11:33,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2020-11-11 15:11:33,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1737. [2020-11-11 15:11:33,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.728110599078341) internal successors, (4736), 1736 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:33,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4736 transitions. [2020-11-11 15:11:33,837 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4736 transitions. Word has length 66 [2020-11-11 15:11:33,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:33,838 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4736 transitions. [2020-11-11 15:11:33,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:33,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4736 transitions. [2020-11-11 15:11:33,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:33,840 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:33,840 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:34,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-11 15:11:34,047 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:34,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:34,048 INFO L82 PathProgramCache]: Analyzing trace with hash 831788212, now seen corresponding path program 29 times [2020-11-11 15:11:34,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:34,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916592418] [2020-11-11 15:11:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:34,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916592418] [2020-11-11 15:11:34,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352565485] [2020-11-11 15:11:34,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:34,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 15:11:34,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:34,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:34,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:34,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:34,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:34,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:34,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-11 15:11:34,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968729991] [2020-11-11 15:11:34,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:34,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:34,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:34,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:34,343 INFO L87 Difference]: Start difference. First operand 1737 states and 4736 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:34,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:34,916 INFO L93 Difference]: Finished difference Result 2809 states and 7284 transitions. [2020-11-11 15:11:34,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:11:34,920 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:11:34,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:34,924 INFO L225 Difference]: With dead ends: 2809 [2020-11-11 15:11:34,924 INFO L226 Difference]: Without dead ends: 2240 [2020-11-11 15:11:34,925 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:11:34,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2020-11-11 15:11:34,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 1677. [2020-11-11 15:11:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 2.7392601431980905) internal successors, (4591), 1676 states have internal predecessors, (4591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 4591 transitions. [2020-11-11 15:11:34,965 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 4591 transitions. Word has length 66 [2020-11-11 15:11:34,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:34,966 INFO L481 AbstractCegarLoop]: Abstraction has 1677 states and 4591 transitions. [2020-11-11 15:11:34,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:34,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 4591 transitions. [2020-11-11 15:11:34,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:34,969 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:34,969 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:35,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:35,183 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:35,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:35,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1460579714, now seen corresponding path program 30 times [2020-11-11 15:11:35,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:35,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044916805] [2020-11-11 15:11:35,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:35,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044916805] [2020-11-11 15:11:35,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495849121] [2020-11-11 15:11:35,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:35,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 15:11:35,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:35,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:35,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:35,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:35,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:35,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:11:35,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432756885] [2020-11-11 15:11:35,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:35,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:35,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:35,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:35,422 INFO L87 Difference]: Start difference. First operand 1677 states and 4591 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:35,831 INFO L93 Difference]: Finished difference Result 3452 states and 9244 transitions. [2020-11-11 15:11:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:11:35,832 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:11:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:35,838 INFO L225 Difference]: With dead ends: 3452 [2020-11-11 15:11:35,838 INFO L226 Difference]: Without dead ends: 3182 [2020-11-11 15:11:35,839 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:11:35,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2020-11-11 15:11:35,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 1802. [2020-11-11 15:11:35,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1801 states have (on average 2.7662409772348697) internal successors, (4982), 1801 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 4982 transitions. [2020-11-11 15:11:35,887 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 4982 transitions. Word has length 66 [2020-11-11 15:11:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:35,888 INFO L481 AbstractCegarLoop]: Abstraction has 1802 states and 4982 transitions. [2020-11-11 15:11:35,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 4982 transitions. [2020-11-11 15:11:35,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:35,890 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:35,890 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:36,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-11 15:11:36,105 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:36,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:36,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1123179628, now seen corresponding path program 31 times [2020-11-11 15:11:36,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:36,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804417443] [2020-11-11 15:11:36,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:36,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804417443] [2020-11-11 15:11:36,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132831543] [2020-11-11 15:11:36,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:36,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:36,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:36,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:36,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:36,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:36,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:11:36,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590081234] [2020-11-11 15:11:36,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:36,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:36,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:36,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:36,387 INFO L87 Difference]: Start difference. First operand 1802 states and 4982 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:36,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:36,923 INFO L93 Difference]: Finished difference Result 2491 states and 6600 transitions. [2020-11-11 15:11:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:11:36,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:11:36,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:36,928 INFO L225 Difference]: With dead ends: 2491 [2020-11-11 15:11:36,928 INFO L226 Difference]: Without dead ends: 2080 [2020-11-11 15:11:36,928 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 15:11:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2020-11-11 15:11:36,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1452. [2020-11-11 15:11:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 2.7057201929703654) internal successors, (3926), 1451 states have internal predecessors, (3926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 3926 transitions. [2020-11-11 15:11:36,956 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 3926 transitions. Word has length 66 [2020-11-11 15:11:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:36,957 INFO L481 AbstractCegarLoop]: Abstraction has 1452 states and 3926 transitions. [2020-11-11 15:11:36,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:36,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 3926 transitions. [2020-11-11 15:11:36,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:36,959 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:36,960 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:37,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:37,160 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:37,161 INFO L82 PathProgramCache]: Analyzing trace with hash 244367777, now seen corresponding path program 32 times [2020-11-11 15:11:37,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:37,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039838196] [2020-11-11 15:11:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:37,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039838196] [2020-11-11 15:11:37,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361528277] [2020-11-11 15:11:37,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:37,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:37,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:37,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:37,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:37,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:37,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:37,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:11:37,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787266915] [2020-11-11 15:11:37,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:37,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:37,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:37,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:37,423 INFO L87 Difference]: Start difference. First operand 1452 states and 3926 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:37,730 INFO L93 Difference]: Finished difference Result 2245 states and 5690 transitions. [2020-11-11 15:11:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:11:37,730 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-11 15:11:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:37,734 INFO L225 Difference]: With dead ends: 2245 [2020-11-11 15:11:37,734 INFO L226 Difference]: Without dead ends: 1975 [2020-11-11 15:11:37,734 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:11:37,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2020-11-11 15:11:37,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1502. [2020-11-11 15:11:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 2.7155229846768822) internal successors, (4076), 1501 states have internal predecessors, (4076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:37,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 4076 transitions. [2020-11-11 15:11:37,768 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 4076 transitions. Word has length 71 [2020-11-11 15:11:37,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:37,769 INFO L481 AbstractCegarLoop]: Abstraction has 1502 states and 4076 transitions. [2020-11-11 15:11:37,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:37,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 4076 transitions. [2020-11-11 15:11:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:37,771 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:37,771 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:37,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-11 15:11:37,985 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:37,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:37,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1073078929, now seen corresponding path program 33 times [2020-11-11 15:11:37,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:37,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908008264] [2020-11-11 15:11:37,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:38,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908008264] [2020-11-11 15:11:38,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519415954] [2020-11-11 15:11:38,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:38,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 15:11:38,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:38,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:38,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:38,236 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:38,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:38,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:38,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:11:38,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067664306] [2020-11-11 15:11:38,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:38,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:38,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:38,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:38,273 INFO L87 Difference]: Start difference. First operand 1502 states and 4076 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:38,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:38,684 INFO L93 Difference]: Finished difference Result 2440 states and 6130 transitions. [2020-11-11 15:11:38,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:11:38,685 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-11 15:11:38,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:38,687 INFO L225 Difference]: With dead ends: 2440 [2020-11-11 15:11:38,687 INFO L226 Difference]: Without dead ends: 2170 [2020-11-11 15:11:38,688 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:11:38,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2020-11-11 15:11:38,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1552. [2020-11-11 15:11:38,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 2.7246937459703418) internal successors, (4226), 1551 states have internal predecessors, (4226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 4226 transitions. [2020-11-11 15:11:38,714 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 4226 transitions. Word has length 71 [2020-11-11 15:11:38,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:38,714 INFO L481 AbstractCegarLoop]: Abstraction has 1552 states and 4226 transitions. [2020-11-11 15:11:38,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 4226 transitions. [2020-11-11 15:11:38,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:38,716 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:38,716 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:38,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-11 15:11:38,917 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:38,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:38,918 INFO L82 PathProgramCache]: Analyzing trace with hash -649459617, now seen corresponding path program 34 times [2020-11-11 15:11:38,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:38,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452325663] [2020-11-11 15:11:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:39,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452325663] [2020-11-11 15:11:39,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435580686] [2020-11-11 15:11:39,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:39,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:39,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:39,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:11:39,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:39,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:39,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:39,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:11:39,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799095324] [2020-11-11 15:11:39,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:39,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:39,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:39,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:39,182 INFO L87 Difference]: Start difference. First operand 1552 states and 4226 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:39,570 INFO L93 Difference]: Finished difference Result 2445 states and 6190 transitions. [2020-11-11 15:11:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:11:39,571 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-11 15:11:39,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:39,574 INFO L225 Difference]: With dead ends: 2445 [2020-11-11 15:11:39,574 INFO L226 Difference]: Without dead ends: 2175 [2020-11-11 15:11:39,574 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:11:39,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2020-11-11 15:11:39,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1602. [2020-11-11 15:11:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1601 states have (on average 2.7332916926920676) internal successors, (4376), 1601 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 4376 transitions. [2020-11-11 15:11:39,605 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 4376 transitions. Word has length 71 [2020-11-11 15:11:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:39,605 INFO L481 AbstractCegarLoop]: Abstraction has 1602 states and 4376 transitions. [2020-11-11 15:11:39,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 4376 transitions. [2020-11-11 15:11:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:39,608 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:39,608 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:39,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-11 15:11:39,809 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:39,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:39,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2105972047, now seen corresponding path program 35 times [2020-11-11 15:11:39,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:39,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857551952] [2020-11-11 15:11:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:39,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857551952] [2020-11-11 15:11:39,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359772642] [2020-11-11 15:11:39,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:40,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 15:11:40,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:40,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:40,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:40,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:40,056 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:40,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:40,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:11:40,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908945016] [2020-11-11 15:11:40,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:40,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:40,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:40,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:40,073 INFO L87 Difference]: Start difference. First operand 1602 states and 4376 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:40,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:40,564 INFO L93 Difference]: Finished difference Result 2445 states and 6240 transitions. [2020-11-11 15:11:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:11:40,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-11 15:11:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:40,570 INFO L225 Difference]: With dead ends: 2445 [2020-11-11 15:11:40,570 INFO L226 Difference]: Without dead ends: 2175 [2020-11-11 15:11:40,571 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:11:40,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2020-11-11 15:11:40,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1652. [2020-11-11 15:11:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 2.741368867353119) internal successors, (4526), 1651 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 4526 transitions. [2020-11-11 15:11:40,601 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 4526 transitions. Word has length 71 [2020-11-11 15:11:40,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:40,602 INFO L481 AbstractCegarLoop]: Abstraction has 1652 states and 4526 transitions. [2020-11-11 15:11:40,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 4526 transitions. [2020-11-11 15:11:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:40,604 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:40,604 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:40,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-11-11 15:11:40,805 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:40,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:40,806 INFO L82 PathProgramCache]: Analyzing trace with hash 749405341, now seen corresponding path program 36 times [2020-11-11 15:11:40,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:40,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298349738] [2020-11-11 15:11:40,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:40,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298349738] [2020-11-11 15:11:40,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439142631] [2020-11-11 15:11:40,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:41,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 15:11:41,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:41,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:41,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:41,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:41,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:41,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:11:41,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757841706] [2020-11-11 15:11:41,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:41,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:41,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:41,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:41,088 INFO L87 Difference]: Start difference. First operand 1652 states and 4526 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:41,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:41,501 INFO L93 Difference]: Finished difference Result 2445 states and 6290 transitions. [2020-11-11 15:11:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:11:41,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-11 15:11:41,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:41,504 INFO L225 Difference]: With dead ends: 2445 [2020-11-11 15:11:41,504 INFO L226 Difference]: Without dead ends: 2175 [2020-11-11 15:11:41,505 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:11:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2020-11-11 15:11:41,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1702. [2020-11-11 15:11:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 2.748971193415638) internal successors, (4676), 1701 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 4676 transitions. [2020-11-11 15:11:41,532 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 4676 transitions. Word has length 71 [2020-11-11 15:11:41,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:41,532 INFO L481 AbstractCegarLoop]: Abstraction has 1702 states and 4676 transitions. [2020-11-11 15:11:41,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 4676 transitions. [2020-11-11 15:11:41,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:41,534 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:41,534 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:41,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:41,742 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:41,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:41,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1714029171, now seen corresponding path program 37 times [2020-11-11 15:11:41,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:41,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046729197] [2020-11-11 15:11:41,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:41,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046729197] [2020-11-11 15:11:41,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351582784] [2020-11-11 15:11:41,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:41,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:41,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:41,985 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:41,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:42,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:42,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:11:42,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136734334] [2020-11-11 15:11:42,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:42,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:42,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:42,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:42,004 INFO L87 Difference]: Start difference. First operand 1702 states and 4676 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:42,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:42,585 INFO L93 Difference]: Finished difference Result 2490 states and 6460 transitions. [2020-11-11 15:11:42,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:11:42,585 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-11 15:11:42,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:42,588 INFO L225 Difference]: With dead ends: 2490 [2020-11-11 15:11:42,588 INFO L226 Difference]: Without dead ends: 2220 [2020-11-11 15:11:42,589 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=889, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:11:42,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2020-11-11 15:11:42,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1752. [2020-11-11 15:11:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.764705882352941) internal successors, (4841), 1751 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4841 transitions. [2020-11-11 15:11:42,625 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4841 transitions. Word has length 71 [2020-11-11 15:11:42,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:42,625 INFO L481 AbstractCegarLoop]: Abstraction has 1752 states and 4841 transitions. [2020-11-11 15:11:42,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4841 transitions. [2020-11-11 15:11:42,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:42,627 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:42,627 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:42,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-11 15:11:42,828 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:42,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:42,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1085237669, now seen corresponding path program 38 times [2020-11-11 15:11:42,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:42,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632211163] [2020-11-11 15:11:42,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:42,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632211163] [2020-11-11 15:11:42,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17275502] [2020-11-11 15:11:42,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:43,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:43,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:43,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:43,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:43,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:43,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:43,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:11:43,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083296290] [2020-11-11 15:11:43,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:43,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:43,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:43,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:43,089 INFO L87 Difference]: Start difference. First operand 1752 states and 4841 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:43,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:43,576 INFO L93 Difference]: Finished difference Result 3552 states and 9544 transitions. [2020-11-11 15:11:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:11:43,576 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-11 15:11:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:43,581 INFO L225 Difference]: With dead ends: 3552 [2020-11-11 15:11:43,581 INFO L226 Difference]: Without dead ends: 3282 [2020-11-11 15:11:43,582 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:11:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2020-11-11 15:11:43,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 1877. [2020-11-11 15:11:43,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 2.788912579957356) internal successors, (5232), 1876 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:43,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5232 transitions. [2020-11-11 15:11:43,616 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5232 transitions. Word has length 71 [2020-11-11 15:11:43,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:43,617 INFO L481 AbstractCegarLoop]: Abstraction has 1877 states and 5232 transitions. [2020-11-11 15:11:43,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:43,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5232 transitions. [2020-11-11 15:11:43,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:43,619 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:43,619 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:43,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-11 15:11:43,835 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:43,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:43,835 INFO L82 PathProgramCache]: Analyzing trace with hash 625970285, now seen corresponding path program 39 times [2020-11-11 15:11:43,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:43,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580905847] [2020-11-11 15:11:43,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:43,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580905847] [2020-11-11 15:11:43,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095657330] [2020-11-11 15:11:43,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:44,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 15:11:44,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:44,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:44,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:44,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:44,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:44,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:44,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:11:44,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372345777] [2020-11-11 15:11:44,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:44,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:44,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:44,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:44,098 INFO L87 Difference]: Start difference. First operand 1877 states and 5232 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:44,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:44,747 INFO L93 Difference]: Finished difference Result 2566 states and 6850 transitions. [2020-11-11 15:11:44,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:11:44,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-11 15:11:44,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:44,750 INFO L225 Difference]: With dead ends: 2566 [2020-11-11 15:11:44,750 INFO L226 Difference]: Without dead ends: 2155 [2020-11-11 15:11:44,751 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:11:44,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2020-11-11 15:11:44,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1391. [2020-11-11 15:11:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 2.710791366906475) internal successors, (3768), 1390 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 3768 transitions. [2020-11-11 15:11:44,779 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 3768 transitions. Word has length 71 [2020-11-11 15:11:44,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:44,779 INFO L481 AbstractCegarLoop]: Abstraction has 1391 states and 3768 transitions. [2020-11-11 15:11:44,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:44,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 3768 transitions. [2020-11-11 15:11:44,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:44,781 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:44,782 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:44,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:44,982 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:44,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:44,983 INFO L82 PathProgramCache]: Analyzing trace with hash 582428331, now seen corresponding path program 40 times [2020-11-11 15:11:44,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:44,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965262861] [2020-11-11 15:11:44,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:45,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965262861] [2020-11-11 15:11:45,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198624770] [2020-11-11 15:11:45,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:45,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:45,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:45,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:11:45,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:45,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:45,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:45,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:45,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:11:45,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522213700] [2020-11-11 15:11:45,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:11:45,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:45,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:11:45,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:11:45,322 INFO L87 Difference]: Start difference. First operand 1391 states and 3768 transitions. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:45,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:45,695 INFO L93 Difference]: Finished difference Result 1961 states and 5036 transitions. [2020-11-11 15:11:45,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:11:45,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:11:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:45,698 INFO L225 Difference]: With dead ends: 1961 [2020-11-11 15:11:45,698 INFO L226 Difference]: Without dead ends: 1691 [2020-11-11 15:11:45,698 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2020-11-11 15:11:45,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2020-11-11 15:11:45,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1476. [2020-11-11 15:11:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 2.6698305084745764) internal successors, (3938), 1475 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 3938 transitions. [2020-11-11 15:11:45,722 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 3938 transitions. Word has length 76 [2020-11-11 15:11:45,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:45,722 INFO L481 AbstractCegarLoop]: Abstraction has 1476 states and 3938 transitions. [2020-11-11 15:11:45,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 3938 transitions. [2020-11-11 15:11:45,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:45,725 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:45,725 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:45,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-11-11 15:11:45,940 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:45,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:45,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1793236313, now seen corresponding path program 41 times [2020-11-11 15:11:45,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:45,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539123019] [2020-11-11 15:11:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:46,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539123019] [2020-11-11 15:11:46,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651995210] [2020-11-11 15:11:46,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:46,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:11:46,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:46,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:46,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:46,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:46,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:46,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-11-11 15:11:46,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318257415] [2020-11-11 15:11:46,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:46,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:46,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:46,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:46,233 INFO L87 Difference]: Start difference. First operand 1476 states and 3938 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:46,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:46,532 INFO L93 Difference]: Finished difference Result 2660 states and 6520 transitions. [2020-11-11 15:11:46,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:11:46,533 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:11:46,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:46,537 INFO L225 Difference]: With dead ends: 2660 [2020-11-11 15:11:46,537 INFO L226 Difference]: Without dead ends: 2390 [2020-11-11 15:11:46,537 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:11:46,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2020-11-11 15:11:46,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 1577. [2020-11-11 15:11:46,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 2.681472081218274) internal successors, (4226), 1576 states have internal predecessors, (4226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 4226 transitions. [2020-11-11 15:11:46,576 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 4226 transitions. Word has length 76 [2020-11-11 15:11:46,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:46,577 INFO L481 AbstractCegarLoop]: Abstraction has 1577 states and 4226 transitions. [2020-11-11 15:11:46,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 4226 transitions. [2020-11-11 15:11:46,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:46,580 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:46,580 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:46,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:46,794 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:46,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:46,794 INFO L82 PathProgramCache]: Analyzing trace with hash 247943753, now seen corresponding path program 42 times [2020-11-11 15:11:46,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:46,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175621629] [2020-11-11 15:11:46,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:46,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175621629] [2020-11-11 15:11:46,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015027723] [2020-11-11 15:11:46,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:47,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:11:47,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:47,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:47,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:47,083 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:47,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:47,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:47,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:11:47,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160285637] [2020-11-11 15:11:47,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:11:47,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:47,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:11:47,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:11:47,115 INFO L87 Difference]: Start difference. First operand 1577 states and 4226 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:47,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:47,563 INFO L93 Difference]: Finished difference Result 2595 states and 6440 transitions. [2020-11-11 15:11:47,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:11:47,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:11:47,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:47,566 INFO L225 Difference]: With dead ends: 2595 [2020-11-11 15:11:47,567 INFO L226 Difference]: Without dead ends: 2325 [2020-11-11 15:11:47,567 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2020-11-11 15:11:47,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2020-11-11 15:11:47,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 1627. [2020-11-11 15:11:47,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.6912669126691267) internal successors, (4376), 1626 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 4376 transitions. [2020-11-11 15:11:47,594 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 4376 transitions. Word has length 76 [2020-11-11 15:11:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:47,594 INFO L481 AbstractCegarLoop]: Abstraction has 1627 states and 4376 transitions. [2020-11-11 15:11:47,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:47,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 4376 transitions. [2020-11-11 15:11:47,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:47,596 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:47,597 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:47,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-11-11 15:11:47,801 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:47,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:47,801 INFO L82 PathProgramCache]: Analyzing trace with hash -319222121, now seen corresponding path program 43 times [2020-11-11 15:11:47,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:47,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225070126] [2020-11-11 15:11:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:48,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225070126] [2020-11-11 15:11:48,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534161792] [2020-11-11 15:11:48,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:48,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:48,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:48,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:48,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:48,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-11-11 15:11:48,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971444965] [2020-11-11 15:11:48,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:48,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:48,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:48,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:48,087 INFO L87 Difference]: Start difference. First operand 1627 states and 4376 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:48,464 INFO L93 Difference]: Finished difference Result 2620 states and 6540 transitions. [2020-11-11 15:11:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:11:48,465 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:11:48,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:48,469 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:11:48,469 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:11:48,469 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:11:48,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:11:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1677. [2020-11-11 15:11:48,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 2.700477326968974) internal successors, (4526), 1676 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:48,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 4526 transitions. [2020-11-11 15:11:48,497 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 4526 transitions. Word has length 76 [2020-11-11 15:11:48,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:48,497 INFO L481 AbstractCegarLoop]: Abstraction has 1677 states and 4526 transitions. [2020-11-11 15:11:48,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:48,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 4526 transitions. [2020-11-11 15:11:48,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:48,500 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:48,500 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:48,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:48,700 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:48,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:48,701 INFO L82 PathProgramCache]: Analyzing trace with hash 509489031, now seen corresponding path program 44 times [2020-11-11 15:11:48,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:48,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796746360] [2020-11-11 15:11:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:48,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796746360] [2020-11-11 15:11:48,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883701016] [2020-11-11 15:11:48,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:48,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:48,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:48,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:48,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:48,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:48,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:49,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:49,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:11:49,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797757713] [2020-11-11 15:11:49,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:11:49,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:49,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:11:49,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:11:49,012 INFO L87 Difference]: Start difference. First operand 1677 states and 4526 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:49,531 INFO L93 Difference]: Finished difference Result 2620 states and 6590 transitions. [2020-11-11 15:11:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:11:49,531 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:11:49,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:49,535 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:11:49,536 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:11:49,536 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 15:11:49,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:11:49,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1727. [2020-11-11 15:11:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 2.709154113557358) internal successors, (4676), 1726 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 4676 transitions. [2020-11-11 15:11:49,574 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 4676 transitions. Word has length 76 [2020-11-11 15:11:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:49,574 INFO L481 AbstractCegarLoop]: Abstraction has 1727 states and 4676 transitions. [2020-11-11 15:11:49,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:49,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 4676 transitions. [2020-11-11 15:11:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:49,577 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:49,577 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:49,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-11 15:11:49,778 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:49,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:49,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1213049515, now seen corresponding path program 45 times [2020-11-11 15:11:49,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:49,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291481034] [2020-11-11 15:11:49,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:49,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291481034] [2020-11-11 15:11:49,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533404974] [2020-11-11 15:11:49,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:50,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-11 15:11:50,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:50,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:50,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:50,037 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:50,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:50,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-11-11 15:11:50,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385751204] [2020-11-11 15:11:50,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:50,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:50,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:50,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:50,051 INFO L87 Difference]: Start difference. First operand 1727 states and 4676 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:50,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:50,453 INFO L93 Difference]: Finished difference Result 2620 states and 6640 transitions. [2020-11-11 15:11:50,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:11:50,454 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:11:50,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:50,458 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:11:50,458 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:11:50,458 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2020-11-11 15:11:50,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:11:50,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1777. [2020-11-11 15:11:50,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 2.7173423423423424) internal successors, (4826), 1776 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 4826 transitions. [2020-11-11 15:11:50,488 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 4826 transitions. Word has length 76 [2020-11-11 15:11:50,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:50,489 INFO L481 AbstractCegarLoop]: Abstraction has 1777 states and 4826 transitions. [2020-11-11 15:11:50,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:50,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 4826 transitions. [2020-11-11 15:11:50,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:50,491 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:50,491 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:50,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-11 15:11:50,692 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:50,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1542382149, now seen corresponding path program 46 times [2020-11-11 15:11:50,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:50,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494222869] [2020-11-11 15:11:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:50,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494222869] [2020-11-11 15:11:50,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956726526] [2020-11-11 15:11:50,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:50,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:50,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:50,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:11:50,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:50,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:50,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:50,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:50,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:11:50,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201456591] [2020-11-11 15:11:50,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:11:50,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:50,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:11:50,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:11:50,990 INFO L87 Difference]: Start difference. First operand 1777 states and 4826 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:51,597 INFO L93 Difference]: Finished difference Result 2620 states and 6690 transitions. [2020-11-11 15:11:51,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:11:51,598 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:11:51,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:51,601 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:11:51,601 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:11:51,601 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 15:11:51,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:11:51,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1827. [2020-11-11 15:11:51,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 2.725082146768894) internal successors, (4976), 1826 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:51,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 4976 transitions. [2020-11-11 15:11:51,629 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 4976 transitions. Word has length 76 [2020-11-11 15:11:51,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:51,629 INFO L481 AbstractCegarLoop]: Abstraction has 1827 states and 4976 transitions. [2020-11-11 15:11:51,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:51,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 4976 transitions. [2020-11-11 15:11:51,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:51,632 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:51,632 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:51,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-11 15:11:51,834 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:51,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:51,835 INFO L82 PathProgramCache]: Analyzing trace with hash 185815443, now seen corresponding path program 47 times [2020-11-11 15:11:51,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:51,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849378739] [2020-11-11 15:11:51,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:51,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849378739] [2020-11-11 15:11:51,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168634268] [2020-11-11 15:11:51,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:52,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:11:52,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:52,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:52,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:52,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:52,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:52,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-11-11 15:11:52,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833766874] [2020-11-11 15:11:52,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:52,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:52,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:52,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:52,091 INFO L87 Difference]: Start difference. First operand 1827 states and 4976 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:52,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:52,676 INFO L93 Difference]: Finished difference Result 2620 states and 6740 transitions. [2020-11-11 15:11:52,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:11:52,677 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:11:52,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:52,680 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:11:52,680 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:11:52,681 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 15:11:52,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:11:52,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1877. [2020-11-11 15:11:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 2.732409381663113) internal successors, (5126), 1876 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5126 transitions. [2020-11-11 15:11:52,723 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5126 transitions. Word has length 76 [2020-11-11 15:11:52,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:52,724 INFO L481 AbstractCegarLoop]: Abstraction has 1877 states and 5126 transitions. [2020-11-11 15:11:52,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:52,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5126 transitions. [2020-11-11 15:11:52,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:52,727 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:52,728 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:52,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-11 15:11:52,941 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:52,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:52,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2017348227, now seen corresponding path program 48 times [2020-11-11 15:11:52,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:52,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480296004] [2020-11-11 15:11:52,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:53,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480296004] [2020-11-11 15:11:53,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038654093] [2020-11-11 15:11:53,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:53,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:11:53,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:53,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:53,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:53,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:53,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:53,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:53,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:11:53,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395166394] [2020-11-11 15:11:53,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:11:53,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:53,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:11:53,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:11:53,216 INFO L87 Difference]: Start difference. First operand 1877 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:53,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:53,900 INFO L93 Difference]: Finished difference Result 2665 states and 6910 transitions. [2020-11-11 15:11:53,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:11:53,901 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:11:53,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:53,904 INFO L225 Difference]: With dead ends: 2665 [2020-11-11 15:11:53,904 INFO L226 Difference]: Without dead ends: 2395 [2020-11-11 15:11:53,905 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 15:11:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2020-11-11 15:11:53,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 1927. [2020-11-11 15:11:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1926 states have (on average 2.7471443406022846) internal successors, (5291), 1926 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:53,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 5291 transitions. [2020-11-11 15:11:53,935 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 5291 transitions. Word has length 76 [2020-11-11 15:11:53,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:53,935 INFO L481 AbstractCegarLoop]: Abstraction has 1927 states and 5291 transitions. [2020-11-11 15:11:53,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:53,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 5291 transitions. [2020-11-11 15:11:53,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:53,938 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:53,938 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:54,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-11 15:11:54,140 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:54,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:54,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1648827567, now seen corresponding path program 49 times [2020-11-11 15:11:54,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:54,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054712446] [2020-11-11 15:11:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:54,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054712446] [2020-11-11 15:11:54,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982867653] [2020-11-11 15:11:54,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:54,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:54,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:54,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:54,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:54,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-11-11 15:11:54,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613758002] [2020-11-11 15:11:54,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:54,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:54,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:54,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:54,379 INFO L87 Difference]: Start difference. First operand 1927 states and 5291 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:54,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:54,953 INFO L93 Difference]: Finished difference Result 3752 states and 10044 transitions. [2020-11-11 15:11:54,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:11:54,954 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:11:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:54,959 INFO L225 Difference]: With dead ends: 3752 [2020-11-11 15:11:54,960 INFO L226 Difference]: Without dead ends: 3482 [2020-11-11 15:11:54,960 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 15:11:54,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2020-11-11 15:11:54,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 2052. [2020-11-11 15:11:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 2.7703559239395417) internal successors, (5682), 2051 states have internal predecessors, (5682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 5682 transitions. [2020-11-11 15:11:55,002 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 5682 transitions. Word has length 76 [2020-11-11 15:11:55,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:55,003 INFO L481 AbstractCegarLoop]: Abstraction has 2052 states and 5682 transitions. [2020-11-11 15:11:55,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 5682 transitions. [2020-11-11 15:11:55,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:55,006 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:55,006 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:55,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-11-11 15:11:55,208 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:55,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:55,208 INFO L82 PathProgramCache]: Analyzing trace with hash 62380387, now seen corresponding path program 50 times [2020-11-11 15:11:55,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:55,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928835178] [2020-11-11 15:11:55,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:55,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928835178] [2020-11-11 15:11:55,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725846066] [2020-11-11 15:11:55,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:55,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:55,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:55,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:55,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:55,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:55,491 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:55,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:55,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:11:55,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456137229] [2020-11-11 15:11:55,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:11:55,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:55,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:11:55,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:11:55,503 INFO L87 Difference]: Start difference. First operand 2052 states and 5682 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:56,237 INFO L93 Difference]: Finished difference Result 2663 states and 7016 transitions. [2020-11-11 15:11:56,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:11:56,238 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:11:56,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:56,242 INFO L225 Difference]: With dead ends: 2663 [2020-11-11 15:11:56,242 INFO L226 Difference]: Without dead ends: 2330 [2020-11-11 15:11:56,242 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 15:11:56,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2020-11-11 15:11:56,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1982. [2020-11-11 15:11:56,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 2.751640585562847) internal successors, (5451), 1981 states have internal predecessors, (5451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:56,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 5451 transitions. [2020-11-11 15:11:56,272 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 5451 transitions. Word has length 76 [2020-11-11 15:11:56,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:56,272 INFO L481 AbstractCegarLoop]: Abstraction has 1982 states and 5451 transitions. [2020-11-11 15:11:56,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:56,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 5451 transitions. [2020-11-11 15:11:56,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:11:56,274 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:56,274 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:56,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:56,475 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:56,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:56,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1380054286, now seen corresponding path program 51 times [2020-11-11 15:11:56,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:56,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964369866] [2020-11-11 15:11:56,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:56,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964369866] [2020-11-11 15:11:56,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142257412] [2020-11-11 15:11:56,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:56,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-11 15:11:56,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:56,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:56,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:56,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-11 15:11:56,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-11-11 15:11:56,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319008849] [2020-11-11 15:11:56,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:56,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:56,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:56,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:56,696 INFO L87 Difference]: Start difference. First operand 1982 states and 5451 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:56,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:56,882 INFO L93 Difference]: Finished difference Result 4415 states and 11702 transitions. [2020-11-11 15:11:56,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 15:11:56,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-11 15:11:56,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:56,884 INFO L225 Difference]: With dead ends: 4415 [2020-11-11 15:11:56,885 INFO L226 Difference]: Without dead ends: 1035 [2020-11-11 15:11:56,885 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:11:56,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2020-11-11 15:11:56,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1035. [2020-11-11 15:11:56,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 2.507736943907157) internal successors, (2593), 1034 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 2593 transitions. [2020-11-11 15:11:56,900 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 2593 transitions. Word has length 81 [2020-11-11 15:11:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:56,900 INFO L481 AbstractCegarLoop]: Abstraction has 1035 states and 2593 transitions. [2020-11-11 15:11:56,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 2593 transitions. [2020-11-11 15:11:56,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:11:56,901 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:56,902 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:11:57,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:57,102 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:57,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:57,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1605796935, now seen corresponding path program 52 times [2020-11-11 15:11:57,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:57,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258085786] [2020-11-11 15:11:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:57,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258085786] [2020-11-11 15:11:57,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604823996] [2020-11-11 15:11:57,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 15:11:57,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:57,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:57,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:57,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:11:57,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-11 15:11:57,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-11-11 15:11:57,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4448014] [2020-11-11 15:11:57,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:57,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:57,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:57,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:57,316 INFO L87 Difference]: Start difference. First operand 1035 states and 2593 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:57,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:57,502 INFO L93 Difference]: Finished difference Result 1502 states and 3433 transitions. [2020-11-11 15:11:57,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 15:11:57,503 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-11 15:11:57,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:57,503 INFO L225 Difference]: With dead ends: 1502 [2020-11-11 15:11:57,503 INFO L226 Difference]: Without dead ends: 0 [2020-11-11 15:11:57,503 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:11:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-11 15:11:57,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-11 15:11:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:57,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-11 15:11:57,504 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 81 [2020-11-11 15:11:57,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:57,504 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-11 15:11:57,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:57,505 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-11 15:11:57,505 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-11 15:11:57,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:57,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.11 03:11:57 BasicIcfg [2020-11-11 15:11:57,713 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-11 15:11:57,715 INFO L168 Benchmark]: Toolchain (without parser) took 55854.45 ms. Allocated memory was 302.0 MB in the beginning and 792.7 MB in the end (delta: 490.7 MB). Free memory was 276.5 MB in the beginning and 325.7 MB in the end (delta: -49.2 MB). Peak memory consumption was 443.4 MB. Max. memory is 16.0 GB. [2020-11-11 15:11:57,715 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 302.0 MB. Free memory was 273.2 MB in the beginning and 273.1 MB in the end (delta: 76.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 15:11:57,715 INFO L168 Benchmark]: CACSL2BoogieTranslator took 732.54 ms. Allocated memory is still 302.0 MB. Free memory was 275.8 MB in the beginning and 279.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 29.8 MB. Max. memory is 16.0 GB. [2020-11-11 15:11:57,716 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.47 ms. Allocated memory is still 302.0 MB. Free memory was 279.0 MB in the beginning and 276.9 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 15:11:57,716 INFO L168 Benchmark]: Boogie Preprocessor took 29.84 ms. Allocated memory is still 302.0 MB. Free memory was 276.9 MB in the beginning and 275.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 15:11:57,716 INFO L168 Benchmark]: RCFGBuilder took 592.09 ms. Allocated memory is still 302.0 MB. Free memory was 275.9 MB in the beginning and 252.8 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2020-11-11 15:11:57,717 INFO L168 Benchmark]: TraceAbstraction took 54423.62 ms. Allocated memory was 302.0 MB in the beginning and 792.7 MB in the end (delta: 490.7 MB). Free memory was 252.8 MB in the beginning and 325.7 MB in the end (delta: -72.9 MB). Peak memory consumption was 417.8 MB. Max. memory is 16.0 GB. [2020-11-11 15:11:57,719 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 302.0 MB. Free memory was 273.2 MB in the beginning and 273.1 MB in the end (delta: 76.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 732.54 ms. Allocated memory is still 302.0 MB. Free memory was 275.8 MB in the beginning and 279.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 29.8 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 61.47 ms. Allocated memory is still 302.0 MB. Free memory was 279.0 MB in the beginning and 276.9 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 29.84 ms. Allocated memory is still 302.0 MB. Free memory was 276.9 MB in the beginning and 275.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 592.09 ms. Allocated memory is still 302.0 MB. Free memory was 275.9 MB in the beginning and 252.8 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 54423.62 ms. Allocated memory was 302.0 MB in the beginning and 792.7 MB in the end (delta: 490.7 MB). Free memory was 252.8 MB in the beginning and 325.7 MB in the end (delta: -72.9 MB). Peak memory consumption was 417.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 685]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 54.2s, OverallIterations: 64, TraceHistogramMax: 6, AutomataDifference: 23.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 5851 SDtfs, 21574 SDslu, 38168 SDs, 0 SdLazy, 7033 SolverSat, 2586 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5073 GetRequests, 3488 SyntacticMatches, 47 SemanticMatches, 1538 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8494 ImplicationChecksByTransitivity, 20.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2052occurred in iteration=61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 64 MinimizatonAttempts, 35922 StatesRemovedByMinimization, 62 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 11.0s InterpolantComputationTime, 7300 NumberOfCodeBlocks, 7296 NumberOfCodeBlocksAsserted, 232 NumberOfCheckSat, 7180 ConstructedInterpolants, 0 QuantifiedInterpolants, 1672222 SizeOfPredicates, 585 NumberOfNonLiveVariables, 8210 ConjunctsInSsa, 756 ConjunctsInUnsatCore, 120 InterpolantComputations, 10 PerfectInterpolantSequences, 350/4520 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...